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Author Topic:   Identifying Older Johnson Outboard Motors Model Numbers
JBCornwell posted 06-11-2006 11:16 AM ET (US)   Profile for JBCornwell   Send Email to JBCornwell  
Up to about 1970, Johnson Model numbers were two or three letters and a two digit number. Prior to 1960 the RD seriers were based on a 40.5 cu-in. block. After 1960 the RD series were based on a 43.9 cu-in. block. The RX series were based on a 35.7cu-in. block, and so forth. Though the number usually identifies the year of production of that model, it is not a calendar year code.

After 1970 model numbers include the HP, as in J33ELUTa.
E=electric start
L=long (20") shaft
UT=year code (see below)
a=production run

[After 1980] the year code uses the letters of the word, "INTRODUCES" to represent the digits 1-0. So the UT would be 73.

I N T R O D U C E S 
1 2 3 4 5 6 7 8 9 0

Red sky at night. . .

bsmotril posted 06-11-2006 02:58 PM ET (US)     Profile for bsmotril  Send Email to bsmotril     
Besides the transom clamp tag, the motor block on OMC motors has a small round metal disc on the top left part of the block with the model and serial number. You can see if the powerhead has been replaced or if it matches the number on the transom clamp. BillS
Creid posted 06-11-2006 03:31 PM ET (US)     Profile for Creid  Send Email to Creid     
I have [a motor with these] numbers:

Serial - 1827190
Model - RDS-20

Is this a Seahorse?

JBCornwell posted 06-11-2006 06:05 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
RDS-20 is a 1958 short (15") shaft 35HP, Creid.

Fuel mix is 24:1
Plugs are Champion J4C (replaces J4J) gapped at .030"
Magneto points are set at .020"

Great engine. :)

Red sky at night. . .

jimh posted 06-12-2006 07:41 AM ET (US)     Profile for jimh  Send Email to jimh     
Thanks for this information. It should be useful for people who have older OMC outboard motors on their classic Boston Whaler boats.
fishrelic posted 07-05-2006 11:59 PM ET (US)     Profile for fishrelic  Send Email to fishrelic     
Thanks for the 'directory' JBCornwell..

We have a Johnson motor with the MOD. No. - J25RWLCOS
So far we figure it out as so:

J = Johnson
25 = 25HP
RW = ***don't know***
L = longshaft
co = 1985
S = ***don't know***

If anyone can help us figure out what the "RW" and "S" means, we would really appreciate your help.
[Removed question on different topic. Start new thread for a new topic--jimh.] Any information on this year and model would be greatly appreciated as we are having trouble getting any information.

JBCornwell posted 07-06-2006 07:55 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
I think the "R" means rope start, fishrelic.

The "S" is a production run code, useful for ordering parts that may have changed during the life of the model.

Don't know about the "W", unless the "RW" means rewind.

My "directory" above is in error. I left out the 1970 to 1980 numbers. During that period both HP and year model are in the model number, as in: J25RL73. The "INTRODUCES" code began in 1980.

Red sky at night. . .

seahorse posted 07-06-2006 07:53 PM ET (US)     Profile for seahorse  Send Email to seahorse     
The " W " means a commercial or "work" engine, and they are usually slightly different than the consumer engines and have lower compression to run very low grade fuels.
cheesybear posted 02-11-2007 01:40 AM ET (US)     Profile for cheesybear  Send Email to cheesybear     
cheesybear posted 02-11-2007 01:43 AM ET (US)     Profile for cheesybear  Send Email to cheesybear     
Maybe you guys can help.

I scored an old 50's-ish johnson 5 hp outboard at an estate sale for a few bucks, but it's missing the label plate. However, the component level part numbers are still readable, and there is a circular chrome plate on the power head with the number 1238650.

Any ideas on where i might be able to find more information? or better yet, parts?

thanks for any ideas.

Tom W Clark posted 02-11-2007 01:53 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

You might contacting the guys at the Antique Outboard Motor Club, Inc.:

The Judge posted 02-12-2007 12:23 PM ET (US)     Profile for The Judge  Send Email to The Judge     
[Gave some anectodal instances of how to interpret the INTRODUCES code. See the first article in this thread for general guidelines on how to interpret the INTRODUCES model code.]
taf001 posted 04-19-2007 01:58 PM ET (US)     Profile for taf001  Send Email to taf001     
Hello/ Just bought my first boat for a little lake we now belong to. Bought the used boat from a guy that didn't really know what he had. The model is the Johnson 6 horse 2 stroke - Model j6rere. Based on what I've read, this is a 1994 motor, not a 1996 as the guy told me. The serial number is B09041123.

What would that model number indicate?

[Change TOPIC to an entirely new discussion. Please begin a new thread if you wish to change the topic to something entirely new--jimh]

Thanks for any help.

The Judge posted 04-19-2007 02:30 PM ET (US)     Profile for The Judge  Send Email to The Judge     
You are correct with year and if electric start then you are correct again.
JBCornwell posted 04-19-2007 03:10 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
The final "E" in the model number is just a manufacturing run number. It is useful for ordering any part that might have changed with that run.

I have not seen a Johnny 6 with electric start, except there was a gadget on the market for a while that attached to the recoil starter that allowed starting with a hand held drill through the cowling.

Red sky at night. . .

Ricky tv posted 05-27-2007 05:49 PM ET (US)     Profile for Ricky tv  Send Email to Ricky tv     
I recently purchased an older 3-P folding Johnson seahorse and I don't know much about it. Can anyone identify the year that this may be?
Model No. JHF23A, serial No. E2878887. I would really appreciate it. Oh, and what is the fuel to oil ratio on these?
JBCornwell posted 05-27-2007 08:03 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
That's a 1968, Ricky.

Fuel mix is officially 50:1, but most of my old salt wrench buddies say to run it with 24:1 due to sleeve bearings in critical points.

Spark plugs are Champion J4C gapped at .030" and points are set at .020".

Red sky at night. . .

Binkie posted 05-27-2007 08:43 PM ET (US)     Profile for Binkie    
I think you have a typo on your spark plug recommendation. The decal on my `66 3-hp Johnson says J4J, and that's what I use. The fuel mix says 50:1 outboard oil, or 30 weight automotive oil. I remember back in the `50s we used to run 24:1 mix 30 weight Auto oil, ( 1 qt. oil, 6 gal. gas) but this was before there was outboard oil. Probably 24:1 is a good idea in the 3 hp too, and I think I will go this way too. Do you think outboard oil is better in these old motors?


JBCornwell posted 05-28-2007 08:23 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
The J4C replaced the J4J, Binkie. If you can find J4J plugs, they will work fine. The J4C is improved, though. The recommended gap has changed back and forth from .040" to .030". Current recommendation is .030" for all purpose use and .040" for extended trolling. Many users go to .035" for mixed applications.

TC-W3 outboard oil is far superior to 30W automotive oil for any carbureted 2 stroke outboard. Far less smoke and carbon residue and far less plug fouling.

OMC called for 24:1 fuel mix up until 1964 and 50:1 for 1964 and later models. The change wasn't due to the introduction of TC-W outboard oil, it was the changeover to "frictionless" (ball and needle) bearings in most OMC outboards.

The JW and JH series didn't complete that changeover until 1970. My trusted expert friends recommend 24:1 with TC-W3 certified oil in JW and JH series engines made before 1970.

It is rare that small engine gurus recommend overriding manufacturer recommendations. This is one case. Another case is the manufacturer recommendations of a 100:1 fuel mix on several small engines made in the 1980s. After experiencing some corrosion in the crankcase of engines stored for extended periods OMC revised their spec to 50:1, but only after the specialists in the field made the switch on all "100:1" small engines.

Red sky at night. . .

Binkie posted 05-28-2007 11:04 AM ET (US)     Profile for Binkie    
Thanks JB, you cleared up the questions I had about running my two antiques, `58 35hp evinrude Lark, and `66 3hp Johnson.


jgkmmoore posted 05-28-2007 03:33 PM ET (US)     Profile for jgkmmoore  Send Email to jgkmmoore     
Cheesybear- I have a CD-12 Model, 1955 Johnson 5.5 #1256462, and a 1954 CD-11 with Ser.# 1131895. Would guess you have a 1955 motor.
The only differences I can see between the two:
1) The 1954 has two wingnut/bolt things securing the cowl, located just forward of, and above the cowl latches.
2) The 1954 has a green prop and spinner, the 1955 has white prop/black spinner.

Those of you wishing year ident/serial numbers, can Google 'OMC serial numbers', and choose from a number of articles. As Tom mentioned, the AOMCI site is good.

jgkmmoore posted 05-28-2007 03:46 PM ET (US)     Profile for jgkmmoore  Send Email to jgkmmoore     
Re: The older 3hp Johnson/Evinrudes: I have a 1964 Evinrude that has a 50:1 placard on top of the recoil. I run 24:1 in it, and it runs quieter (and smokier). It's nearly silent now. The 50:1 seemed ok, but the motor ran warmer overall, and after long periods of trolling seemed noisier? Rattly type noise.Much more soothing with 24:1. Catch more fish with 24:1 too. What a little jewel. It is so dependable, and it will run on beer, I swear. When my mower gas 'dates out', I huck it into the Evinrude. I'm a sucker for 'old tech'. If it's got compression, you can make it run. KISS.
JBCornwell posted 05-28-2007 05:41 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Yes, jgkmmoore. In my opinion the JW and JH series 3, 3.5, 4, and 4.5hp JohnnyRudes and their descendants are the best small outboards ever made, by anyone.

Red sky at night. . .

Ricky tv posted 05-30-2007 12:12 AM ET (US)     Profile for Ricky tv  Send Email to Ricky tv     
Thanks for the response, JBCornwell. Now after tinkering with it over the weekend I have another question, should the powerhead be hot to the touch after running it in a test barrel for just a minute or two? How can I tell if it's running hot?

JBCornwell posted 05-30-2007 07:50 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Your dealer has temp sticks for checking powerhead temp, Ricky. They melt at certain temps and can verify if it is above (melts) or below (doesn't melt) that temp.

There should be a spray of water coming out the exhaust holes low on the leg, but that is not conclusive, nor is the wrenchs' trick of holding your hand on the powerhead for 3 seconds (if you can it is not too hot).

That said, if you cannot verify that the impeller has been replaced within the last 2 years, replace it.

That is a truly wonderful engine. If you treat it well it will make you love it.

Red sky at night. . .

jgkmmoore posted 05-31-2007 03:22 PM ET (US)     Profile for jgkmmoore  Send Email to jgkmmoore     
JBC- I agree with you on the 'J'motors. However, I have come to really appreciate the CD motor group as well- the 5.5 and early 7.5 johnson/Evinrudes. They are nearly silent, start on the first pull,and run smooooth. And they are lightweight! Built very well.
mixerman55 posted 01-09-2008 01:54 PM ET (US)     Profile for mixerman55  Send Email to mixerman55     
I have a jonso seahorse model number RDS-24 can someone tell me the size of this motor
JBCornwell posted 01-09-2008 05:37 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
I responded to your thread, Mixerman. It is not good 'net manners to double up a question.

Red sky at night. . .

Jim Rester posted 02-03-2008 10:28 AM ET (US)     Profile for Jim Rester  Send Email to Jim Rester     
My Johnson has a model # that does not correspond to the "what year is it" guides. It is J3REB. It is a Belgium 3 hp twin. SN 09007613

Also the Stop Switch is broken off down in the housing. Does anyone know whether that was a Push button kill switch or a lanyard safety pin type?

Thanks for any help - Jim

treman posted 04-15-2008 03:52 PM ET (US)     Profile for treman  Send Email to treman     
i just purchased a johnson super seahorse engine and have no idea of the horsepower rating or year model. any help would be appreciated. thanks model# v4sl-15s serial# 2351793
Whale1 posted 04-16-2008 10:57 AM ET (US)     Profile for Whale1    
Let's see if I got any better at posting links:-)

If so, try this one for old Johnson numbers.


seetherealmccoy posted 04-30-2008 11:00 PM ET (US)     Profile for seetherealmccoy  Send Email to seetherealmccoy     
I have just purchased a boat with what I believe to be a 1990 Johnson 150 v6 VRO, that is what the coaling says anyway. But I can not find a model number on it to save my life! I have look on the silver dot on the top of the pistons and all that. Any other ideas PLEASE
yardboy posted 06-16-2008 07:37 AM ET (US)     Profile for yardboy  Send Email to yardboy     
I just got my first boat. It has a Johnson Super Sea Horse 80 hp electramatic on it. Model# V4AL-18C Serial# J2634913
Was wondering if anyone could give me some information on this motor. Thanks in advance.
dpty11 posted 06-20-2008 12:50 AM ET (US)     Profile for dpty11  Send Email to dpty11     
I have a 40hp Johnson motor with the model # J40elcr. Can anyone help me find the year of this motor. I have tried everything and the only thing I come up with is there is an 8 in the year
Tom W Clark posted 06-20-2008 12:54 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

Read the first post in this thread. You have a 1984. It should have a white cowl with decals and the rest on the motor painted gray.

THathaway posted 06-21-2008 06:46 AM ET (US)     Profile for THathaway  Send Email to THathaway     
I just picked up a Johnson 40hp electric shift outboard. The model # plate is missing but the serial # round plate is still there.
I know the motor is a RK series and the serial # J2,740,251.
Could someone help me identify the year.
metrofire posted 07-23-2008 05:56 PM ET (US)     Profile for metrofire  Send Email to metrofire     
What year was the Johnson "Javelin Anniversary Edition" made?
seahorse posted 07-23-2008 07:50 PM ET (US)     Profile for seahorse  Send Email to seahorse     

What year was the Johnson "Javelin Anniversary Edition" made?

Johnson's 50th anniversary was in 1972

Tohsgib posted 07-24-2008 12:20 PM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
Javelins were made a couple years I believe. I am almost positive 1979 and 1980. I know 79 for sure and none in 81.
seahorse posted 07-24-2008 05:01 PM ET (US)     Profile for seahorse  Send Email to seahorse     
"Javelins were made a couple years I believe.I am almost positive 1979 and 1980. I know 79 for sure and none in 81."

They were also made in the late 1950's, too.

gholden posted 02-08-2009 11:34 AM ET (US)     Profile for gholden  Send Email to gholden     

I have an old Johnson outboard. It has a number on the top that is A10512.
It also has what I think is the original shipping crate with a Railway
Express shipping card and a Perterson's Fishing Camp, Winton MN tag on the
Do you know what year this motor is?
12 horse krueger posted 02-23-2009 03:33 PM ET (US)     Profile for 12 horse krueger  Send Email to 12 horse krueger     
i am a newbie so please bear with me. i have what appears to be a vintage johnson outboard. the model number is LT10 and the S/N is 360700. i have had the motor running but i need a fuel line and the fuel tank strainer. any information about the age of this motor and parts sources?
i collect single cylinder gasoline engines but my 3hp weight about 500 pounds. outboards are new to me.
thanks for the help
dbrown posted 02-23-2009 08:19 PM ET (US)     Profile for dbrown    
LT-10 is a 1940 5 Horsepower Johnson. You may want to check the link below for more information and possible parts sources.

12 horse krueger posted 02-26-2009 03:19 PM ET (US)     Profile for 12 horse krueger  Send Email to 12 horse krueger     
thanks for the info.
redeyez posted 02-26-2009 05:40 PM ET (US)     Profile for redeyez  Send Email to redeyez     
my number is J90TLCUR dont no what what is the tlcur mean
dbrown posted 02-26-2009 06:13 PM ET (US)     Profile for dbrown    
T= Tilt and Trim/Electric start
L= Long Shaft (20")
CU= Model year (in your case, 1987)
R= Model run (of no interest to most)
Tohsgib posted 02-26-2009 08:05 PM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
Yep. 1987
redeyez posted 02-27-2009 03:34 PM ET (US)     Profile for redeyez  Send Email to redeyez     
its a 1987?
wezlee posted 03-23-2009 10:09 AM ET (US)     Profile for wezlee  Send Email to wezlee     
I just bought a Johnson motor and was able to get some numbers off the transom area of 85593E and J0006056-T. Can anyone tell me what this motor is? Thanks!
dbrown posted 03-23-2009 12:28 PM ET (US)     Profile for dbrown    
Model number 85593 is a 1975 85 HP Evinrude.
wezlee posted 03-23-2009 12:36 PM ET (US)     Profile for wezlee  Send Email to wezlee     
Thank you very much. Do the cowlings exchange? This one has a Johnson cowling. What is the other set of numbers? Could they be the serial number? Thanks again.
Acoach posted 03-28-2009 03:36 PM ET (US)     Profile for Acoach  Send Email to Acoach     
I have a motor that has a cowl that says "Three Sea King" The tag on the transom says Montgomery Wards Model GG18735 Serial # 16X833480. Whatis this thing? and what year is it?
jimh posted 03-28-2009 03:42 PM ET (US)     Profile for jimh  Send Email to jimh     
Montgomery Ward was a department store chain. They sold a line of private label outboard motors made by various outboard manufacturers. It sounds like you have one of their c.1961 3-HP models.

For a history of the Montgomery Ward department store chain, see

The letters "GG" in your model number are likely indicative of the engine being made by GALE PRODUCTS.

CONTINUOUSWAVE is not particularly interested in collecting or organizing information about obscure older outboard motors, and I recommend you pursue your investigation using other web resources. I can point you in the direction of one website, which is easily found and located using a search on the terms "Sea King outboard motor", at

jeaglesoar posted 03-29-2009 03:07 PM ET (US)     Profile for jeaglesoar  Send Email to jeaglesoar     
OK, I'm confused now about the johnson serial numbers from what I have read previously here. My serial number is J2655717. The only letter is "J". Can anyone help to clear this confusion up?
jimh posted 03-29-2009 03:25 PM ET (US)     Profile for jimh  Send Email to jimh     
It is difficult for us to know your prior state of mind, so we really do not understand the precise nature of your confusion. Please frame your inquiry in a way that would allow those readers who have specialized knowledge about the history of older OMC outboard motors to answer.
jeaglesoar posted 03-29-2009 07:40 PM ET (US)     Profile for jeaglesoar  Send Email to jeaglesoar     
My confusion is derived from the previous postings as to decipher the serial number. Example: posting dated 06-11-2006. My serial number is different from those previous postings about what the serial numbers really mean in identifying the motor. The model number is V4A1-18C and the serial number is J2655717.
witnessProtection posted 04-15-2009 07:48 PM ET (US)     Profile for witnessProtection  Send Email to witnessProtection     
I have a 9.9 Johnson Seahorse outboard motor. Model # 10R78M (the M appears very skinny on both transom and freeze plug) Serial # E4837093. I would like to know year and fuel to oil mixture.
jimh posted 04-15-2009 11:39 PM ET (US)     Profile for jimh  Send Email to jimh     
Please stop posting this article. I have removed five copies of it.

One of your five articles elicited a reply that your motor is a 1978 and uses a 50:1 mix.

wbowen posted 05-13-2009 10:51 PM ET (US)     Profile for wbowen  Send Email to wbowen     
[Another guy with an old motor who posts his request for information to mutiple threads. Duplicate deleted here.--jimh]
seahorse posted 05-13-2009 11:50 PM ET (US)     Profile for seahorse  Send Email to seahorse     
wbowen--You have a 1978 85hp motor
seahorse posted 05-13-2009 11:51 PM ET (US)     Profile for seahorse  Send Email to seahorse     


I think you should lock this old thread and leave the following link for those who end up here and want to find out what year motor they have. docktalk/modref/modelyr.html

jimh posted 05-14-2009 01:34 PM ET (US)     Profile for jimh  Send Email to jimh     
Why do people who own old motors think that it is appropriate to post inquires to multiple threads about them? One per customer would be appreciated. If every article here were posted in duplicate or triplicate, we'd have a helluva mess. What makes people think old outboard serial numbers are exempt from common sense?
wbowen posted 05-14-2009 09:12 PM ET (US)     Profile for wbowen  Send Email to wbowen     
I am posting this twice also. [Actually I deleted the duplicate already--jimh.] I thank you for the web page that showed the serial numbers but I think [you're] an asshole for assuming that I am trying to make life hard for YOU and asking my question twice. I think you need a vacation or maybe stop eating the cherios in the morning because someone is surely [vulgar phrase deleted] in them. I hope you get OFF your high horse and give some of us some credit. I didn't design the serial number system for these motors and if I would of I surely would of did it better. So again I didn't mean to make you mad and make me out to be stupid because I am far from that. But again thanks for being an asshole and pointing me in the right direction. I will never ask anything HERE again.....ASSHOLE!!!!
jimh posted 05-14-2009 11:59 PM ET (US)     Profile for jimh  Send Email to jimh     
Predictable reply.

Sorry, but no credit given. Basic discussion forum manners: You post your article once, you wait a day or two before posting again. That's how it works. You're welcome to participate in these discussions, but please don't think your topic is so important it gets to be posted twice to multiple places.

Tohsgib posted 05-15-2009 10:23 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
I never knew Cherios were bad for you.
dbrown posted 05-15-2009 12:29 PM ET (US)     Profile for dbrown    
I will never ask anything HERE again

That's a refreshing thought.

pglein posted 05-15-2009 12:35 PM ET (US)     Profile for pglein  Send Email to pglein     
I never knew Cherios were bad for you.

Well, when someone is depositing vulgar phrases in them, they are.

I will never ask anything HERE again.

That would be just dandy!

lifewithoutlimits2008 posted 05-22-2009 03:16 AM ET (US)     Profile for lifewithoutlimits2008  Send Email to lifewithoutlimits2008     
I just got an old Johnson motor. I was told it was a 75 hp but have no clue what year or anything. I searched for the model number but was unable to find one and it appears that the plate was removed. The cap on the power head is all I have to go by but the number doesn't match anything Ive found. The number is J2363069. Any help anyone could give would be appreciated. Oh the hood says Johnson Super Seahorse Electramatic if that helps.
RiverRat posted 05-22-2009 11:06 AM ET (US)     Profile for RiverRat  Send Email to RiverRat     
Looking for info on a 25HP Johnson, only model numbers that [I] can identify are 25EL. I realize this is little help as we already know [it is] a 25-HP electric start, long shaft. Only other numbers are the serial number E5442996. Can anyone help identify the year and fuel mix?
twheinze posted 05-23-2009 01:18 PM ET (US)     Profile for twheinze  Send Email to twheinze     
[Asks for the proper fuel:oil mix ratio and model year of a Johnson] 80 electric [Super Seahorse with] model number v4sl-19r. [Duplicate posted deleted.]
twheinze posted 05-24-2009 12:51 PM ET (US)     Profile for twheinze  Send Email to twheinze     
Im sorry they are all capital letters.

model number - V4SL-19R

Captain Bill F posted 07-01-2009 02:32 AM ET (US)     Profile for Captain Bill F  Send Email to Captain Bill F     
Greetings. I have a 1980's Johnson OB, Model CJ5RHCOV, so it decodes to a 1985 Canadian manufactured rope start (no integral tank), 15" shaft, 5hp motor.The cowling decal says 4.5 HP, and I'm wondering whether it is a 4.5 or a 5-HP, not that it really makes that much difference. Any insights would be greatly appreciated. Cheers. Bill
Rochester, NY
Tohsgib posted 07-01-2009 11:58 AM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
1985 model year and is either 4.5 or somewhere between that and 5hp. 1/2 does not matter much but it was later called a 4hp deluxe when they went to prop rated hp in 1986. Great engines(basically a revamped 6hp) and I own 2 of them. They were made from 1980-1985 as a 4.5hp and then a 4 deluxe until mid 90's.
driversseat posted 07-01-2009 12:04 PM ET (US)     Profile for driversseat  Send Email to driversseat     
Hello all. I just got a boat with an old Johnson motor.
Model # FDL-19D. Cowling says 18HP, rigged with electric start. Did not come with manual. Would like to know year, gas mix ratio. Thanks
dbrown posted 07-01-2009 12:39 PM ET (US)     Profile for dbrown    
The Johnson FDL-19D is a 1965 model. Fuel/oil ratio is 50:1. Great little engines.
kenbob posted 07-09-2009 09:22 PM ET (US)     Profile for kenbob  Send Email to kenbob     
Hi guys. I've got a 6 horse Johnson Sea Horse outboard that is in shockingly good condition. I believe it is a 1973, but perhaps you can confirm this. The Model [octothorpe--probably meant "number"] as best as I can see is 6B-73S or maybe 68-73S. The serial [number] is: J13730532. I just brought it up from the basement after 12 years and am excited to put it on my old 12ft semi-V again. But I cannot remember the mix ratio. Can you please advise? Sure appreciate it. Thanks!!
R T M posted 07-09-2009 10:25 PM ET (US)     Profile for R T M    
These charts should help. The mix ratio is 50:1


kenbob posted 07-10-2009 07:58 AM ET (US)     Profile for kenbob  Send Email to kenbob     
Thats awesome. Ima check it out. Thanks Rich!!
kenbob posted 07-10-2009 08:58 AM ET (US)     Profile for kenbob  Send Email to kenbob     
Hey sorry, I forgot: Any info on plugs/gap for this 1973 Johnson 6 horse Sea Horse? Also, what type of 2 stroke oil is best for it? Thanks.
R T M posted 07-10-2009 09:12 AM ET (US)     Profile for R T M    
kenbob, ask your question at this site in the ask a member section. I used Walmart oil in the oldies, they seem to love it.

JimBenson posted 07-20-2009 07:04 PM ET (US)     Profile for JimBenson  Send Email to JimBenson     
I have been trying to find out what this motor is, I read the description above and I don't think it applies to my motor, I think it's a 1968 30hp Johnson, but I'm not sure. The model number is RDE 18 C. It has a pull start and also a starter. Thanks for any help.
MushCreek posted 07-20-2009 07:30 PM ET (US)     Profile for MushCreek  Send Email to MushCreek     
It's a 1956 30 hp electric start.
JimBenson posted 07-20-2009 07:51 PM ET (US)     Profile for JimBenson  Send Email to JimBenson     
Thanks. Do you know where I can get info on the mixture, plug gaps, and magneto gaps?
R T M posted 07-20-2009 10:21 PM ET (US)     Profile for R T M    
JB`s post fourth from the top will give you the specs. No such thing as magneto gaps. When you pop off the flywheel, you will find the magneto, on it you will find two sets of coils, points and condensers. You can replace all these parts for $46. with the exception of the points, but they are available too if needed. If you want I can give you the name and address of the individual that sells these parts. I am doing the same job on the same engine at present. Very simple to do and good preventive maintenance.If your engine is a `56 it is 30hp. If your engine is 30hp it is a`56. 30hp only made in that year for the big twins. The freeze plug on the block near the head should start wit #25xxxx.


12bdebtfree posted 07-25-2009 03:02 PM ET (US)     Profile for 12bdebtfree  Send Email to 12bdebtfree     
I just picked up a late model johson 40 hp. Can somebody help me with the year model is RK 30 D serial is J2900461 Thanks
R T M posted 07-25-2009 03:40 PM ET (US)     Profile for R T M    


smokinone posted 07-26-2009 05:58 PM ET (US)     Profile for smokinone  Send Email to smokinone     
i have a johnson 50 model number:50esl74m
serial number:e4043811

trying to figure out what year it is also have a 17 foot MonArk riveria iv and i cant find any info on it.i dont know the year on it either i really need to know the weight to fix was a free boat need info.

R T M posted 07-26-2009 06:57 PM ET (US)     Profile for R T M

They will help you out.


poacher1 posted 07-31-2009 02:53 PM ET (US)     Profile for poacher1  Send Email to poacher1     
hi guys, really glad to have found people who know what there talking about!

i have just bought a johnson sea horse outboard for my fishing boat. would really appreciate some info with regard to model no. BJ 4 BRC OB. also there is no spark. any one no how to remove the flywheel?

thanks, Poacher1

newt posted 07-31-2009 07:18 PM ET (US)     Profile for newt  Send Email to newt     
Rich, I have a 1992 J150ELENC. Can you help me with what year this motor is?
TRACY posted 08-03-2009 08:55 PM ET (US)     Profile for TRACY  Send Email to TRACY     
HI, I have a 1963 to 1968 or so 40 hp johnson, not sure of fuel mix, think it's 24 to 1
TRACY posted 08-03-2009 08:59 PM ET (US)     Profile for TRACY  Send Email to TRACY     
model # RKL-27A
serial # J25777370
john13096 posted 08-04-2009 09:55 AM ET (US)     Profile for john13096  Send Email to john13096     
I was just given a Johnson outboard 7 1/2 HP Model AD-10m
Serial number 1405070. Can anyone give me an idea where to begin with a rehab on this motor. Also any information on year made etc. Thanks much
springboater posted 08-06-2009 08:22 PM ET (US)     Profile for springboater  Send Email to springboater     
I just got a Johnson super seahorse 80 hp electramatic the model # is V4AL - 19R and the serial is J2809161 can anyone tell me the year and how i can find a part number for a ignition coil for this motor. Thanks
R T M posted 08-06-2009 10:34 PM ET (US)     Profile for R T M    
We seem to have a lot of interest in old outboards all of a sudden. If you go to this site (Antique Outboard Motor Club-AOMCI) they have a question and answer board and can answer all your questions. Maybe you will want to join the club too. Monthly meetings, great fun.


Rick1952 posted 09-21-2009 02:44 PM ET (US)     Profile for Rick1952  Send Email to Rick1952     
I recently picked up an older Johnson Sea Horse outboard. I have no idea what the [horsepower] is, nor do I know what year it is. It appears to have the serial number 599709, and (model) TD20. [Please] provide me with any information. I sure would appreciate it.
Buckda posted 09-21-2009 02:59 PM ET (US)     Profile for Buckda  Send Email to Buckda     
We can surmise that it is a pre-1970 motor, as after 1970, they used a model number format that was much more complex.

i.e. J33ELUTa = Johnson, 33 HP, Electric Start, 1973 (UT=1973).

The TD-20 model was available from 1941-1949 (with some production suspended for WWII).

The "D" means it is a direct drive motor - meaning there is probably no clutch to give you a neutral gear.

It is 5 hp (at the powerhead).

That's the best I could do...Others here can help further.


cadiwack posted 10-02-2009 03:06 PM ET (US)     Profile for cadiwack  Send Email to cadiwack     
I have an old Johnson outboard motor that I am trying to figure out what kind it is. These are the only numbers posted on it: 27E250, Serial number 415574, KD 15, and what looks like 27B200 and 25A22A. Can you help me identify this? Thanks
jgwade99 posted 10-27-2009 06:11 PM ET (US)     Profile for jgwade99  Send Email to jgwade99     
I have a 6hp Johnson and I'm looking for a hood to go on it, however I dont' know what year model it is. I found the model # J6RCRM and Serial # E5873093 on the transom mounting bracket. Can any one tell me what the year model is of the motor?
jimh posted 10-27-2009 07:12 PM ET (US)     Profile for jimh  Send Email to jimh     
Read the first article in this thread.

CR = 84

jlblazer posted 10-31-2009 10:27 AM ET (US)     Profile for jlblazer  Send Email to jlblazer     
i just got a johnson electramatic super sea horse 40 with model# rkl-27a serial # j2576781 can any one help me find the year
georgewilliam posted 11-11-2009 08:57 PM ET (US)     Profile for georgewilliam  Send Email to georgewilliam     
I have a johnson electramatic 85hp. model #J2936463 ( ONLY NUMBER I CAN FIND) can anyboby tell me what year this is? thanks
tltm66 posted 11-16-2009 06:08 PM ET (US)     Profile for tltm66  Send Email to tltm66     
I have purchased a 115 Johnson and the numbers on the transom clamp are defaced and i can only read 115E and the last number is an S and the silver plug on the top of the motor does not correspond with the number on the clamp, is their another way to identify the year model of the motor? Thanks in advance for any assistance.
JMARTIN posted 01-14-2010 07:54 PM ET (US)     Profile for JMARTIN  Send Email to JMARTIN     
I was recently given an old Johnson 10 hp. Interested in how old it was, I googled and ended up with this post. The numbers on the motor looked like OD 17. Using JB's "introduces" I determined it was a 1956.

Upon further looking and a better flashlight, the numbers are actually QD 17. I think it is still a 1956. There are some owners manuals for sale for model QD 17 which indicate that the model year is 1956. Am I correct?


jake68 posted 03-06-2010 01:37 PM ET (US)     Profile for jake68  Send Email to jake68     
[What is described as perhaps a] 1987 [Evinrude] pull-start outboard [with] long shaft [and] no [ID] tag anywhere [has a] freeze plug on top [with the number] h0199997 on it. Tell me what it is. [T]hanks--jake68
jimh posted 03-06-2010 05:56 PM ET (US)     Profile for jimh  Send Email to jimh     
Jake--What information do you seek?
parigod posted 03-27-2010 06:49 PM ET (US)     Profile for parigod  Send Email to parigod     
[I] have a [J]ohnson outboard motor[.] [I] need to know the year of the motor[.] [T]he model number is j90tlc0
jimh posted 03-27-2010 11:23 PM ET (US)     Profile for jimh  Send Email to jimh     
Read the first article in the thread.
damon_m posted 03-29-2010 09:04 AM ET (US)     Profile for damon_m  Send Email to damon_m     
Hello all. Thank you for the great information that has been shared here! Is there a way to find out information from the serial number of an engine? I have a early 1990's Johnson 9.9 but the ID label has been damaged and I cannot read the model number. The serial number is G02643720. Where could I find out?


nontypically0075 posted 04-16-2010 03:54 PM ET (US)     Profile for nontypically0075  Send Email to nontypically0075     
[I] have a [J]ohnson 30hp motor[.] [I] am trying to identify the model and year. [C]an anyone help[?] [T]his is stamped on it[:] j30rerm thank you
jimh posted 04-17-2010 12:50 PM ET (US)     Profile for jimh  Send Email to jimh     
I do not recall anyone previously reporting that the words "thank you" were stamped on their engine. Perhaps this was a message from the manufacturer to the customer expressing their appreciation for purchase of the product.

If it is possible the engine were made post-1980, then see the first article in this thread for a guide to interpretation of the model identifier


If the information already provided in this thread is applied to interpreting this engine as a post-1980 model, the interpretation would be

Johnson 30-HP Rope Start 1994 Production sequence M

davez12d posted 04-19-2010 06:50 PM ET (US)     Profile for davez12d  Send Email to davez12d     
I have a 30hp johnson but dont know the year can someone help me mod# is J30TECCE thanks for your help.

[Dave--You need to read the first article in the thread--jimh.]

harleydave89 posted 07-30-2010 11:36 PM ET (US)     Profile for harleydave89  Send Email to harleydave89     
I [would like] to know what year [a Seahorse electric] 40-HP model number PDSL-23, serial number 2195272 [was made]. [Also, what is the proper] spark gap? [Also seeks] [technical] [information about this motor]. Thank You Very Much! DAVE
JERI2010 posted 08-01-2010 02:35 PM ET (US)     Profile for JERI2010  Send Email to JERI2010     
my friend has a Johnson 4 seahorse 2 cylinder boat motor.
> the model number is J4WCNR.
> We would like to know what year this motor was built in and what is the going rate for this motor in general.
> The motor is in good working condition.
> Thanks for your reply in advance
Djjdave1 posted 08-11-2010 11:33 AM ET (US)     Profile for Djjdave1  Send Email to Djjdave1     
Not sure if I am putting this in the right section, but I see some conversation regarding Johnson motors,

I have for intents and purposes a Johnson 40hp Electrashift superquiet. Now thats everything on the outside of the housing from top to bottom.

I have searched high and low for the modle tag and serial number and have come up with nothing other then the circular ID disk which has stamped in it the large O with the M in the center of it and the numbers as follows: J3300506. I am trying to figure the year so I can order parts. Seems my ball park is somewheres between 1962 and 1970.

This motor has been setting around for almost 10 years, has great compression. I have found no real damage to the motor. The fuel bowl looked like someone put jelly in it, but some carb and choke cleaner and all the passages cleaned out and looks fine.

I want to put in a new water pump inpeller and figure now would be the time to hit up all the seals and hopefully gaskets on the lower end. By the way, lower end lube came out clean, no water or debris. I just dont want to get this running, put it in the water and find out that I have just blown out all my low end lube and replaced it with water........LOL

Any help would be greatly appreciated

depriest posted 08-17-2010 11:53 AM ET (US)     Profile for depriest  Send Email to depriest     
I have a Johnson Seahorse 5.5 model # CD-13A, serial # 1417292 with double fuel-airline tank. [Changed topic to discuss the potential selling price. Please start a new thread for the topic of the value of older motors. This thread is focused on helping people identify these older motors--jimh]
isaac6751 posted 09-15-2010 07:47 PM ET (US)     Profile for isaac6751  Send Email to isaac6751     
[Seeks information about] a Seahorse [engine with a number of] 378058 on the engine mount.
philsky posted 09-15-2010 09:12 PM ET (US)     Profile for philsky  Send Email to philsky     
I have an older jhonson outboard and am trying to find out the year and horsepower.The model#FD-19D and serial#J2592114.Apreciate any info on this,thanks.
rebel4068 posted 09-19-2010 12:47 PM ET (US)     Profile for rebel4068  Send Email to rebel4068     
[Seeks information about an 85-HP OMC with] model#:85ml780 and sn:j4956660.
91EZGOER posted 09-26-2010 10:19 PM ET (US)     Profile for 91EZGOER  Send Email to 91EZGOER     
can anyone help find the year and hp of my johnson
outboard? can't read # stamped on freeze plug. id plate missing. have numbers from cover- 376920 the numbers on the cyl.-305369. I think the numbers on the freeze plug are - 1692879 they are real hard to read. motor was given to me I belive it"s a 35 hp seahorse. 1955 - 1959 any help would be appriciated. thanks
peekaboo posted 09-27-2010 02:00 PM ET (US)     Profile for peekaboo  Send Email to peekaboo     
I know you same old question but still I need your help. I bought a boat with a Johnson Super Seahorse 35hp and all what I got is the serial # 1920746. What year is it? Thank you
91EZGOER posted 09-27-2010 10:17 PM ET (US)     Profile for 91EZGOER  Send Email to 91EZGOER     
[Contributed no useful information to the discussion. If you don't have information to contribute on this topic, please to do not post your idle thoughts to the thread. Thank you.--jimh]
Not2Available posted 08-24-2012 08:33 PM ET (US)     Profile for Not2Available  Send Email to Not2Available     
I have...a Johnson Model CD251 and SN J2959513 [and identifies it as] a 1986 [and seeks more information].

[This thread is only for identifying the year and model of engines. Please start a new thread to change the topic of discussion to other topics. Thank you. Since you have already identified your engine as a 1986 model, you can obtain a great deal of information about it from SHOP.EVINRUDE.COM and the PARTS section of that fine website. They have details on their engines as far back as the 1960's.--jimh]

Jodiedove posted 03-22-2013 08:42 PM ET (US)     Profile for Jodiedove  Send Email to Jodiedove     
Hi all. I have a 30 HP Johnson and don't know the year . The number I got off the power head is G3167437, I was hoping someone could help so I can order parts and a manual.


ebwalk posted 03-23-2013 03:58 PM ET (US)     Profile for ebwalk  Send Email to ebwalk     
I think that is the serial number. My 35 HP had a tag on the left side below the motor head with a SN and a model number. I have a Clymer shop manual for 2-40 HP 1973-1990 I will sell you for $10 plus shipping if that is relevant.
mikefree posted 06-07-2013 05:18 PM ET (US)     Profile for mikefree  Send Email to mikefree     
Hi. I have a 6hp johnson. I tried introduces but the model doesn't jive. I went to the boat place and they could not identify the year. Maybe one of you can help..?
J6RSZ c8182917

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