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I have a engine on a jhon boat its a jhonson sea man 1 to 2 hp 1970-1990 and it runs good for about a half hour then it cuts off and still will run but not for long is it 2 cycle or do i need to put oil in it if so where

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Mix 16 oz ooutboard motor oil in the gas appox 5 gals, 50 to 1 ratio If you run it with out oil in gas you may have burned up the piston, take a compression test you should have 80 to 100 lbs Jim F

Posted on Jun 19, 2009

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Posted on Jan 02, 2017

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Looking to repower 1997 Four Winns bowrider with newer outboard engine. What max HP is boat rated for? Found Yamaha 150 XB 2016 for a good price . Will boat work with a 25 inch shaft? Thanks,Kathy


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No fire to the plugs looks like the man owned it befor me put the 100 hp evinrude on it it should of been a 175 jhonson..jhonson plug has 2 extra wires.. can you please help


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You may have completely different ignitions.

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