1996 90hp Evinrude rough idle/stall

captlee

Petty Officer 2nd Class
Joined
Aug 22, 2008
Messages
101
1996 90hp ocean pro. smokes alot on cold start up, has a slight miss at trolling speed which becomes worse at idle. After 2-3 minutes it stalls but will start easy again. High speed operation is outstanding. Compression is 120 in all clyinders, new fuel filter and plugs. Do these carbs have low speed jets? Friend suggested Seafoam additive to clean the carbs? How well does that work? and will it harm an aluminum fuel tank?
 
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