1979 johnson 35hp problem

abrfd935

Recruit
Joined
May 15, 2014
Messages
1
My outboard will run great hooked to a water hose but will not pick up speed in the water.
 

greenygreen

Seaman Apprentice
Joined
May 13, 2014
Messages
48
Re: 1979 johnson 35hp problem

seems like what i have been dealing with. i found i had no spark to my top cylinder. but im no pro
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,129
Re: 1979 johnson 35hp problem

Check spark then compression. A very sick outboard will run on just one poorly working cylinder when on muffs as there is no exhaust backpressure against water like when you put it in the sea/lake/river/watertank
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,129
Re: 1979 johnson 35hp problem

Check spark with spark tester too not just grounding plug against the block
 
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