Help Identify Engine

[Brucetafer]

only thing I can get off the motor is SEAHORSE 25, and the pictures...

forward, reverse pull start.

 

[Brucetafer]

Re: Help Identify Engine

More Pictures

 

[mark1961]

Re: Help Identify Engine

Based purely on the cowling, i think '71 may be pretty close.....i dont see anything in your earlier pics which looks remotely like a 25hp johnson model number.....if im correct it should be either 25R71S or 25RL71S depending on the shaft length.

 

[Brucetafer]

Re: Help Identify Engine

Is there anywhere else on the engine I can look for the model???

 

[mark1961]

Re: Help Identify Engine

Those are the two places in your first pics.....its possible the transom clamps have been changed and are from a 18 hp evinrude.....the ground off part looks as if it could be the start of 18202R ('72 18hp evinrude) but thats only a stab in the dark.

 

[Brucetafer]

Re: Help Identify Engine

Awesome thanks mark, I did a little research, and it looks like a 1971... You know the gas/oil ratio???

 

[mark1961]

Re: Help Identify Engine

Awesome thanks mark, I did a little research, and it looks like a 1971... You know the gas/oil ratio???

It has a roller bearing crank so to me that means 50:1 would be a fairly safe assumption.....if you still have doubts run it at 25:1 until you are sure.....wont hurt it.

Also, could it be that this motor is in fact an 18hp evinrude with a johnson 25hp cowling?

 

[Brucetafer]

Re: Help Identify Engine

very well could be, i have nothing on this engine other than the numbers given... it does have power tho, and pushes that boat pretty damn well... the prop is either a 6x6 or 9x9 so maybe that can help..

 

[SeaKaye12]

Re: Help Identify Engine

Well...the serial number on the block doesn't match the one on the transom plate...

Is the block paint color E'rude blue? Maybe it is an 18?

Chuck

 

[Chinewalker]

Re: Help Identify Engine

The shell, lower cowl and lower unit all look like early 1970s Johnson. The tiller bracket and clamps look like Evinrude. Not uncommon - the motor is about 40 years old. Stuff breaks. They get repaired with what is available. There's about 20 years worth of Johnrude 22-cuber parts that have a lot of interchangeability between them.

And yes, your motor would be 50:1 as it is clearly newer than '64, which is the cut-off for the 24:1 mix...

 

[Brucetafer]

Re: Help Identify Engine

it looks like a freak motor, the guy who i bought it from was a real florida redneck so god knows what the real story on it is... all i know is it pushes this 14 foot carolina skiff pretty hard...

ill send a pic of the whole motor tonight, 360 view...

im glad its 50:1, any oil preference??? i love quicksilver tc3 low ash stuff... expensive but works good...

 

[oldybutagoody]

Re: Help Identify Engine

Its a Genuine Johnyrude.

 

[Brucetafer]

Re: Help Identify Engine

hey kalamazoo, im from grand rapids

yeah the owner had a ford f350 in the back yard with a cummins and a chevy bed on it... dudes got issues lol...

 

[oldybutagoody]

Re: Help Identify Engine

Howdy neighbor. Why does it say you're from Orlando? Winter residence?

hey kalamazoo, im from grand rapids

yeah the owner had a ford f350 in the back yard with a cummins and a chevy bed on it... dudes got issues lol...

 

[Brucetafer]

Re: Help Identify Engine

nah, just moved here... used to live on the thornapple river, had a cool little dock and a cool little bass boat... just too damn cold for me.. i like warm weather and hot chicks... its hard to find both up there

 

[oldybutagoody]

Re: Help Identify Engine

I've kayaked the Thornapple 2-3 times. Nice lazy little river. It does take a bit of gettin' used to the weather up here but it's plenty hot today - 94˚. Good luck with your Johnyrude. Hope it's not a salt water engine.

nah, just moved here... used to live on the thornapple river, had a cool little dock and a cool little bass boat... just too damn cold for me.. i like warm weather and hot chicks... its hard to find both up there

 

[jimmbo]

Re: Help Identify Engine

Well the cowl is 1971, either a 20hp or 25hp

 

[Brucetafer]

Re: Help Identify Engine

lol, it says 25 on her... i didnt go home last night, (got lucky) so ill recheck the motor tonight... nah its pretty good, no salt use...

 

[Brucetafer]

Re: Help Identify Engine

well had my neighbor come look at the motor and he says its a johnson or evinrude fastwin looks like 25 hp he said... he tweaked the carb a little and the boat damn near hit 30 mph.... so im guessing its a 25 hp lol...

anyhow, the prop is pretty chewed up and looks original... its a 9x9 prop with a shear pin and cone... my question is i have a 14 foot carolina skiff flats boat, and want to go as fast as i can hence the river where i live takes around 30 minutes to get to where i wanna go... could i prop this bad boy with a 9x11 and get faster top end??? she gets on plane super fast and takes off like a rocket...

 

[jimmbo]

Re: Help Identify Engine

what rpms are you turning. if it is a 25hp rpm range is 5000-6000, if it is a 20hp 4000-5000.