![]() ![]() I also need help identifying a Johnson Sea Horse. Set the low speed needle on the front of the motor to about 1/2 to 5/8 of a turn open and the high speed knob to about 1- 1 1/2 turns. ![]() ![]() Appears complete, engine turns over freely. Serial number 114927 Has been stored in a garage for approx. Vintage 4 cycle Johnson Iron Horse model X-512. That is 16:1, plus that old a motor probably has a lot of internal wear so the extra rich oil mix will help 'fill in the spaces.' ScottIf you can read the decal on the front of the motor it says to mix 1/2 pint of oil per gallon of gas. The engine seems to have great compression and is in very good shape. Can someone ID the year, oil/fuel ratio and recommend a repair manual. Cleaned out a garage last week and was given an old Johnson Sea Horse model HD25, Seriel Number 568404. ![]()
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