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Author Topic:   Mercury Propeller Part Number Decoding

Keeper posted 08-08-2007 11:00 AM ET (US)
I have a prop which I believe to be a Mercury brand, and on the hub is the number 48 66138A4 19P. [What is] the model designation?
Thanks
KEEPER
jimh posted 08-08-2007 03:40 PM ET (US)
Most of the newer propellers from Mercury have the particular model designation embossed into them. You may have an older propeller or one that is just a generic propeller. If it were a LASERII, a MIRAGEplus, a REVOLUTION4, and so on, it typically will have the model name cast into the hub.
You can also help identify the propeller by giving some more detail about it, such as:
--the number of blades
--the diameter of the hub
--the length of the hub
--the arrangement of the supports between in the inner and outer hub
--and, of course, it goes without saying in this digital age and global connected internet, you might give some thought to posting a digital image of the propeller.
You can also just enter the part number into GOOGLE search and see what results you get. If it is a current number it will probably turn up in a listing somewhere, and you will be able to make an inference about what model it is.
bluewaterpirate posted 08-08-2007 03:55 PM ET (US)
If you really get stumped go to the Mericury Site below:
http://sites.mercurymarine.com/portal/page?_pageid=126,48417& _dad=portal&_schema=PORTAL
Tom
Keeper posted 08-08-2007 06:20 PM ET (US)
The outside diameter of the hub is approx. 4 inches.
The length of the hub is approx. 5 3/4 inches. (mounted)
It is a right hand rotion.
Three blade prop.
The numbers are stamped into the middle of the hub between blades.
It had a rubber hub.
I confirmed with a prop dealer that the number is indeed a Quilsilver part number.
He said it was older though and was not sure of the model.
The arrangement of the inner to outer hub is three supports.
It is a 19 pitch.
Sorry no picture.
Thanks for the feedback.
KEEPER
Dick posted 08-08-2007 06:30 PM ET (US)
If my memory is in gear I believe that is a standard older Mercury aluminum 19 pitch prop. It is what would now be called a Black Max. There is nothing wrong with the older props and if you do spin the rubber hub a prop shop can replace it.
Keeper posted 08-08-2007 06:39 PM ET (US)
Sorry. I forgot to ad that it is a stainless propeller. . . .oops duh !
Keeper
jimh posted 08-08-2007 08:57 PM ET (US)
If it is a Quicksilver part it is not a Mercury propeller. They are different brands.
jimh posted 08-08-2007 08:58 PM ET (US)
How many splines on the drive shaft?
an86carrera posted 08-08-2007 09:01 PM ET (US)
The part number looks like a Mercury product.
Len
Dick posted 08-08-2007 09:36 PM ET (US)
It could well be a stainless prop rather than aluminum, I don't have a prop book here at home. It is a Mercury prop if the number starts with 48. Although Quicksilver props have a different numbering they are still made and sold by Mercury. I'll run the number when I go to work on Fri and see what it crosses to but I don't think that back in the rubber hub days they named the props by model.
Tom W Clark posted 08-08-2007 09:53 PM ET (US)
48 66138A4 19P is a Mercury Quicksilver 13-1/2" x 19" three blade stainless steel cupped propeller. The closest current equivalent of it is a 13-1/4" x 20" Laser II.
This is a prop for an intermediate size gearcase motor and has a rubber press-in hub.
Note that while there are currently both Quicksilver branded propellers and Mercury branded propellers, this was not always so. Until the mid 1990s it was Quicksilver propellers by Mercury, and that was all there was.
Keeper posted 08-08-2007 10:30 PM ET (US)
Thanks Tom,
The local prop shop gave me 2 used propelers try, and this was one of them. (Actually it has never been used, just old).It is for my 1988 Boston Whaler 15 Super Sport with Yamaha 70 HP 2-stroke. I recently added a Bobs Machine Shop 5" Jackplate.
This prop seemed to work real well for this set-up. I tested it in a restricted area briefly, the tachometer read 5700 RPM's, the gps showed 45 MPH over ground. A little scary for me so I backed out and came in. I am going to test it in 'real world' conditions, i.e. turns, into swell, down swell, full load, etc. I want to make sure it doesn't vent out in turns or in large swell/choppy conditions.
I am extremely happy thus far with the jackplate/ new prop combination on this boat. Porpoising (bow oscilation) has been dramatically reduced as well. The boat just feels safer.
I will give a more detailed report when I get the set-up more dialed in.
Thanks again.
Keeper

Sal DiMercurio posted 08-08-2007 10:58 PM ET (US)
Wow, 45 mph at 5700 rpms with a 19 pitch is really cooking, sounds more like a 21 pitch.
Sal
Keeper posted 08-09-2007 12:22 AM ET (US)
Hey Sal,
Yeah that's what I thought. Since it's a Merc product I asssume it's actually 21" of pitch. I really appreciate all your help and info on the jackplate. I am not 100% on this prop just yet however. It was there in the shop and free for a test ride. I have not commited to buying anything yet.
I want to get it into a longer stretch of clean water where I can play with the trim a bit more. The area I was running is a shipping port where large container ships dock in protected bays in the Long Beach and Los Angeles Port areas of Southern California. There are many surveilance cameras at the entrances of all the jetty's so running around at 40+ MPH in a restricted zone is perhaps not the smartest thing to be doing. So i got in and out real quick!
The GPS I am using is a Lowrance LMS 334i color sounder GPS combo unit.
I'll keep you posted.
Once again thanks Sal I'll send you some pics soon.
Keeper


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Author	Topic: Mercury Propeller Part Number Decoding
Keeper	posted 08-08-2007 11:00 AM ET (US) I have a prop which I believe to be a Mercury brand, and on the hub is the number 48 66138A4 19P. [What is] the model designation? Thanks KEEPER
jimh	posted 08-08-2007 03:40 PM ET (US) Most of the newer propellers from Mercury have the particular model designation embossed into them. You may have an older propeller or one that is just a generic propeller. If it were a LASERII, a MIRAGEplus, a REVOLUTION4, and so on, it typically will have the model name cast into the hub. You can also help identify the propeller by giving some more detail about it, such as: --the number of blades --the diameter of the hub --the length of the hub --the arrangement of the supports between in the inner and outer hub --and, of course, it goes without saying in this digital age and global connected internet, you might give some thought to posting a digital image of the propeller. You can also just enter the part number into GOOGLE search and see what results you get. If it is a current number it will probably turn up in a listing somewhere, and you will be able to make an inference about what model it is.
bluewaterpirate	posted 08-08-2007 03:55 PM ET (US) If you really get stumped go to the Mericury Site below: http://sites.mercurymarine.com/portal/page?_pageid=126,48417& _dad=portal&_schema=PORTAL Tom
Keeper	posted 08-08-2007 06:20 PM ET (US) The outside diameter of the hub is approx. 4 inches. The length of the hub is approx. 5 3/4 inches. (mounted) It is a right hand rotion. Three blade prop. The numbers are stamped into the middle of the hub between blades. It had a rubber hub. I confirmed with a prop dealer that the number is indeed a Quilsilver part number. He said it was older though and was not sure of the model. The arrangement of the inner to outer hub is three supports. It is a 19 pitch. Sorry no picture. Thanks for the feedback. KEEPER
Dick	posted 08-08-2007 06:30 PM ET (US) If my memory is in gear I believe that is a standard older Mercury aluminum 19 pitch prop. It is what would now be called a Black Max. There is nothing wrong with the older props and if you do spin the rubber hub a prop shop can replace it.
Keeper	posted 08-08-2007 06:39 PM ET (US) Sorry. I forgot to ad that it is a stainless propeller. . . .oops duh ! Keeper
jimh	posted 08-08-2007 08:57 PM ET (US) If it is a Quicksilver part it is not a Mercury propeller. They are different brands.
jimh	posted 08-08-2007 08:58 PM ET (US) How many splines on the drive shaft?
an86carrera	posted 08-08-2007 09:01 PM ET (US) The part number looks like a Mercury product. Len
Dick	posted 08-08-2007 09:36 PM ET (US) It could well be a stainless prop rather than aluminum, I don't have a prop book here at home. It is a Mercury prop if the number starts with 48. Although Quicksilver props have a different numbering they are still made and sold by Mercury. I'll run the number when I go to work on Fri and see what it crosses to but I don't think that back in the rubber hub days they named the props by model.
Tom W Clark	posted 08-08-2007 09:53 PM ET (US) 48 66138A4 19P is a Mercury Quicksilver 13-1/2" x 19" three blade stainless steel cupped propeller. The closest current equivalent of it is a 13-1/4" x 20" Laser II. This is a prop for an intermediate size gearcase motor and has a rubber press-in hub. Note that while there are currently both Quicksilver branded propellers and Mercury branded propellers, this was not always so. Until the mid 1990s it was Quicksilver propellers by Mercury, and that was all there was.
Keeper	posted 08-08-2007 10:30 PM ET (US) Thanks Tom, The local prop shop gave me 2 used propelers try, and this was one of them. (Actually it has never been used, just old).It is for my 1988 Boston Whaler 15 Super Sport with Yamaha 70 HP 2-stroke. I recently added a Bobs Machine Shop 5" Jackplate. This prop seemed to work real well for this set-up. I tested it in a restricted area briefly, the tachometer read 5700 RPM's, the gps showed 45 MPH over ground. A little scary for me so I backed out and came in. I am going to test it in 'real world' conditions, i.e. turns, into swell, down swell, full load, etc. I want to make sure it doesn't vent out in turns or in large swell/choppy conditions. I am extremely happy thus far with the jackplate/ new prop combination on this boat. Porpoising (bow oscilation) has been dramatically reduced as well. The boat just feels safer. I will give a more detailed report when I get the set-up more dialed in. Thanks again. Keeper
Sal DiMercurio	posted 08-08-2007 10:58 PM ET (US) Wow, 45 mph at 5700 rpms with a 19 pitch is really cooking, sounds more like a 21 pitch. Sal
Keeper	posted 08-09-2007 12:22 AM ET (US) Hey Sal, Yeah that's what I thought. Since it's a Merc product I asssume it's actually 21" of pitch. I really appreciate all your help and info on the jackplate. I am not 100% on this prop just yet however. It was there in the shop and free for a test ride. I have not commited to buying anything yet. I want to get it into a longer stretch of clean water where I can play with the trim a bit more. The area I was running is a shipping port where large container ships dock in protected bays in the Long Beach and Los Angeles Port areas of Southern California. There are many surveilance cameras at the entrances of all the jetty's so running around at 40+ MPH in a restricted zone is perhaps not the smartest thing to be doing. So i got in and out real quick! The GPS I am using is a Lowrance LMS 334i color sounder GPS combo unit. I'll keep you posted. Once again thanks Sal I'll send you some pics soon. Keeper