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Author Topic:   2001 evinrude 70 4 stroke
kenh posted 11-15-2002 10:55 AM ET (US)   Profile for kenh   Send Email to kenh  
I am repowering my 1992 montauk w/ a 2001 70 hp 4 stroke.Any suggestions on prop size and pitch,controls,guages etc.any help would be appreciated, Thanks The old motor was a 92 100hp merc 2 stroke.I have kept the original teleflex steering and cable
Bigshot posted 11-15-2002 11:35 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
About 8 of us on this site have done the same repower. I also believe it is probably the best repower for that boat. You will be slower than that 100hp but you will not be me. Anyway I went with the OMC single lever control with built in key and alarms. I also use the Systems match tach with idiot lights. I am currently running a 13x19 alum prop and with a light load(2 people full tank, etc) it performs the best. My cruise is 3800 rpms at about 26+mph. Top end is about 39+ at 5450. I also recommend a 13 3/8?x17 Stainless. Top end drops to 38 at 5800 and cruise is about 4k @ 26mph. Better holeshot etc but I like the 19". Actually I am gonna have the 17" SST made into an 18". Mount the engine high on the transom 1.5"+ or do what I and some have done and mount a manual jackplate. I currently have my engine up about 4+" and she runs like stock but I can go in about 15" of water on plane. If you need the controls or tach, etc call Marine surplus at 941-758-3552 and have them shipped. The controls are $225(new) and $69 for the tach. Wiring harness is another $65 or so. They also have a great selection of SSt or alum props. They will ship and no sales tax if out of state. I paid under $400 for controls, tach, speedo, hour meter, wiring harness, and anodized bezels. Most dealers want about $4-450 for the controls alone. Get the cables locally and your steering will be fine. Good luck and enjoy.
kenh posted 11-15-2002 11:46 AM ET (US)     Profile for kenh  Send Email to kenh     
Thank you Bigshot for the speedy reply.I will take your advice and order the necessary control,tach etc.I recently purchased this motor from is used 2 seasons[3 mo each] and sells for $2599.Thought it was a great price,just hope it performes as expected.Thanks again,Ken
JBCornwell posted 11-15-2002 11:55 AM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
I can echo Bigshot's experiencce except that I am using an 18" SS prop from Suzuki.

With that I get 38.5 @ 5800 with two adults and a boy, 28 gal of fuel 2 batteries and tackle for all. You do get a better hole shot with a 17" but watch out for over-rev.

I am compelled to say that you will fall irrevocably in love with that engine.

Red sky at night. . .

David Jenkins posted 11-16-2002 07:47 AM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
Ken, are you sure that you did not buy that motor from after JB gave us a head's up on it, about two months ago. If not, they had one just like that sold for the same price and came from a fish camp in Canada. It shipped from Washington state. If it was not you, the person who bought that one made the purchase about 10 minutes before I had iboats on the phone. I ended up buying a year 2000 model they had, also used only 3 months out of the year, for slightly less money.

I have not installed mine yet because I wanted to re-gelcoat the boat first. I'm working on that now.

Against everyone's better judgement, I am trying to use mine on a 15'. I may be over the weight limit without anyone on board!

I ordered a 13 1/4 x 19 stainless prop.

jstachowiak posted 11-16-2002 10:21 PM ET (US)     Profile for jstachowiak  Send Email to jstachowiak     
I'm one of those guys bigshot mentioned. Just bought a new 2001 Evinzuki/Suzirude 4 stroke and had it installed. Mounted 1 1/4" above transom. Replaced a 1979 90HP merc. I'm running a 14x19 aluminum prop.
jstachowiak posted 11-18-2002 09:39 AM ET (US)     Profile for jstachowiak  Send Email to jstachowiak     
This is the guy I bought my gauges from:

The panel I bought off of e-bay, when he had them on there, was the $89.50 panel.

Bigshot posted 11-18-2002 10:41 AM ET (US)     Profile for Bigshot  Send Email to Bigshot are probably gonna need a 21" but try it and if close you can have it repitched to a 21".

jstachowiak, What numbers are you running on that 14x19?

kenh posted 11-18-2002 10:15 PM ET (US)     Profile for kenh  Send Email to kenh     
Dave,I did buy my 70 evinrude from
I received it this past Friday.and am in the process of installing it now.I took it to the local Evinrude dealer for installation,because if something is wrong with it,they will be able to do the warranty.It came out of a fishing camp in British Columbia and was shipped out of Washington.I paid 2599.00 plus 275.00 shipping.The motor looks pretty good,but I noticed a lot of new parts installed on it.I will keep you posted as to how it performs.I am fitting it with a 19"stainless prop.Note to jatachowiak,JBCORNWELL,and BIGSHOT:again thanks for all the advice,Ken
jstachowiak posted 11-19-2002 06:27 AM ET (US)     Profile for jstachowiak  Send Email to jstachowiak     
I'm currently running a 14x19 at 4800RPM WOT. I just bought a SST 13 3/8x17 off e-bay and will try that. Got it cheap, so if it needs reworking I can do that. My Newport 17 screams at 4800RPM, will be interesting with the SST 17 pitch to see how she runs. Thanks for the thanks, but this board does a great job in advise. Been here since June 2002 and it has given me the courage/advise I needed to do what I've done so far. I love it.
Bigshot posted 11-19-2002 01:41 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
kids....the WOT range is 5200-5800. Do not prop it to run under 5200. This is not a 2 stroke and the constant load may cause issues like blown head gaskets, etc. Not sure what may happen but get it up to 5500 WOT to be sure. The 17" SST should run right about 5800. If too high have it double cupped which will bring her down 100-200rpm's.
David Jenkins posted 11-19-2002 05:31 PM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
Kenh, Did you buy controls and cables from iboats? I did but I am not sure if they are in the same box as the engine. The box is still unopened....
kenh posted 11-20-2002 09:47 AM ET (US)     Profile for kenh  Send Email to kenh     
David,I did not buy the controls,cables,etc from iboats,just the motor{with no prop}Bigshot gave me some great advice on where to buy the other rigging necessary.I am going with the smart system tach,etc.I unpacked the motor out of the crate and it appears to be in pretty good condition.I noted a ding on the lower hsg where someone hit a rcck.Please note-I only received a 60 day if your's is the same ,better try it out to make certain it is ok.That is 60 days from deliveery date,Ken
David Jenkins posted 11-20-2002 10:26 AM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
I was told that additional warranty was available if I bought it during the 60 day period. I believe that it was about $300 per year. I wonder if anyone feels that this is a good idea or not ($900 for a three-year warranty).
Bigshot posted 11-20-2002 11:41 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Take the warranty
Bigshot posted 11-20-2002 11:41 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Take the warranty
jstachowiak posted 11-20-2002 12:18 PM ET (US)     Profile for jstachowiak  Send Email to jstachowiak     
If you are considering buying a used or e-bay prop check out:

Then click on the appropriate outboard motor make, "Buy Now", then click "Help me choose the right pitch" and voila, there is a great cross reference chart for your motor for all kinds of props and sizes.

This helped me pick out the ones I wanted to bid on, on e-bay. Make sure that the seller indicates the model number of the prop, if no model number, don't buy. Model numbers should be stamped somewhere on the prop, or if new on the box.

RMS posted 11-20-2002 03:34 PM ET (US)     Profile for RMS  Send Email to RMS     
Bigshot, regarding the static trim with the additional weight of the 4stroke, is the gearcase clear of the water when moored, or is it partially submerged? My 90hp Yammy 2stroke on a 16'7" hull sits with the tip of the bullet in the water, so I imagine the 70 extra pounds will exacerbate this situation. Perhaps the Evinzuki has a greater range of tilt? Thanks, Bob
David Jenkins posted 11-20-2002 06:27 PM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
Have any of the owners of this engine had problems that were covered by the warranty? I am hesitant to pay $900 for three years of warranty on an investment that cost only three times that amount (with shipping).
JBCornwell posted 11-20-2002 09:43 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Zero problems, David.

Red sky at night. . .

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