running on one cylinder

C

churchboat

Recruit
Joined
Jul 17, 2009
Messages
1
I have a Johnson 48 SPL and unless I am at full throttle it is running only
on the bottom cylinder. It is blowing gas from the top cylinder back into
the cowling. Any ideas what I need to do? Thank you
 
Benny1963

Benny1963

Lieutenant
Joined
Sep 17, 2006
Messages
1,476
Re: running on one cylinder

check spark on top cyl ,check top plug for fuel fouling you may have a carb dumping fuel into top carb killing the plug bad needle and seat impropoer
.float adjustment or bad float ,but spark check that cyl first
may want to comp check both cyls
 
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