johnson super sea horse 50

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greg64

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Mar 16, 2008
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7
hey i just got a super sea horse 50 and want to find out the year serial# is 1938587 it runs but could use a tune up are there parts still around or a manual out there thanks greg
 
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F_R

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Jul 7, 2006
Messages
28,226
Re: johnson super sea horse 50

That serial number puts it at a 1959. That would be the infamous "Fat-50". A great motor, a real work horse, and the world's second most notorious gas hog. Seconded only by the 1958 Fat 50. We could stand it in 1959, but with gas at $4 a gallon you won't be using it much. It'll cost you 35-40 dollars an hour to run it.
 
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greg64

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Mar 16, 2008
Messages
7
Re: johnson super sea horse 50

so now that i know the year of the motor 1959 does any one know the fuel mix , how to set the carbs , idel and which screws are for what settings , what kind of ignition does it have points and how to set it same for plugs ? any info is greatly appreciated thanks greg
 
samo_ott

samo_ott

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Jun 18, 2006
Messages
5,125
Re: johnson super sea horse 50

it's 24:1 tc-w3 oil for the mix.

the carb set up is listed here on the site in past threads, just search for it.

and I believe that at WOT it will use around 5 gallons/hour thus at $4 a gallon around $20 an hour...

also search on other fat 50 info. The unique distributor and other stuff on it will be there.
 
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F_R

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28,226
Re: johnson super sea horse 50

The high speed mixture needles are toward the center of the carb, under the little cover and operated together by the large pointer knob. You can turn them independently by lifting the knob and turning it so it points at you. The two smaller knobs are the slow speed mixture needles.

Points are under the blet driven pulley at the rear. Make sure you know how to time the belt before removing it. Points are set at .020" at their widest gap. Plugs are J4C. set at .030

If you have one that will run at 4GPH ar WOT, you have a rare one. 8+ is more normal
 
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