super sea horse

[josh600]

I have a johnson super sea horse 50hp model# V4SL11B. I would like to know the year and where to find parts.
Thanks.

 

[1946Zephyr]

Re: super sea horse

1959 "Fat Fifty" Most parts should still be available. What all do you need?

 

[josh600]

Re: super sea horse

i need a carb rebuild kit for now and possible other things, i haven't got the motor torn down to far yet.

 

[tashasdaddy]

Re: super sea horse

you are going to need the parts and service manual for that motor. there is nothing online. here are the proper manuals. http://www.outboardbooks.com/index.cfm?fuseaction=models.main&year=1959&ID=128543

your carb kit # 436959 float 377164 you need one for each carb.

 

[josh600]

Re: super sea horse

I have a repair manual and thanks for the carb kit part #.

 

[Chris1956]

Re: super sea horse

TD and Josh - The fat fifty has a single two barrel downdraft carb. The carb has one cork float, two low speed adjustments and two high speed adjustments, with a synchronizer.

 

[josh600]

Re: super sea horse

how do i make more power with this motor. I see in the service manual that the 50, 60, and 65hp motors have the same bore and stroke, and the same carb a type e. so what makes one more powerful than the others? are the compression ratio's the same? do they have the same heads and rotating assembly? and can i have a machine shop shave a .5mm of of the heads to raise compression.

 

[Willyclay]

Re: super sea horse

how do i make more power with this motor and can i have a machine shop shave a .5mm of of the heads to raise compression.

You can throw a lot of money at that motor and still have a slow, torquey stump-puller. I had the heads on my 1962 V4 Johnson 75HP milled .010inch for trueing but it made no noticeble difference in the performance. Your best hope is for the compression to be 100psi or greater AND within ten percent on each cylinder so that it runs well. Your's is the A-model of that design. The 60&65HP versions of the 70.7c.i. motors had a fixed, high-speed jet carburetor and the rated HP was at 4500 and 5000 rpm's respectively compared to 4000rpm for the 50HP. I played with an adjustable high-speed carb like yours on my 75, but again did not notice any difference. Good luck!

 

[W_Guy]

Re: super sea horse

Interesting reply Willy. I also would like to find an easy way to get more power from my '58 Four Fifty. You stated that you used both type carbs and noticed no difference. Does that mean that if I rev my '58 to 4500 or 5000rpm I could pick up 10hp or so?

 

[Willyclay]

Re: super sea horse

Does that mean that if I rev my '58 to 4500 or 5000rpm I could pick up 10hp or so?

Yes, I believe so. OMC did this with other motor designs also. However, there could be some other differences such as porting or ignition that is part of the equation. One of the forum experts, which I am not, will have to address this question so we can all learn something.

 

[1946Zephyr]

Re: super sea horse

Make sure that there isn't any changes in the pistons. On some motors, the increase of horsepower comes from different pistons and heads, i.e. the 25 vs. the 20.

 

[mchin]

Re: super sea horse

get a big gas tank, the fat fifty was a gas hog