1992 Evinrude 9.9 Running Slow

Kingkong33

Recruit
Joined
Aug 3, 2020
Messages
3
I have a 1992 Evinrude 9.9. Motor was running fine in the morning, then on the way into the ramp it would only run slow. I replaced the fuel, cleaned the carb and replaced the fuel pump. Motor starts fine, runs at slow speed fine, no sputtering or shutting down, just running slow and not getting up to high speed to plane boat out.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,881
Do you have strong spark on both leads ?----Sounds like it might be running on 1 cylinder.-----Compression test too.----Check to see if carburetor cam follower is there.----Plastic bits have a tendency to break !
 

Kingkong33

Recruit
Joined
Aug 3, 2020
Messages
3
Compression was around 80 for each. Noticed that the plugs were carboned up pretty bad and they were new this year. But it has been running slow for the past couple of trips. Could the coils have anything to do with it?
 
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