3.0L mercruiser dead miss

David Florine

Recruit
Joined
Jun 12, 2006
Messages
1
I have a 1989 Dynasty with distributerless ingition system that I bought new and have never had trouble with it. Now, above 3000 rpm it has developed a dead miss with aome "pop-back". At first I thought it was fuel related but I sprayed starter fluid in the carb with it in neutral at 3200 rpm and it still did it. (this is after cleaning all filters and adding "water-out" fuel additive. Any ideas??
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,494
Re: 3.0L mercruiser dead miss

do a compression test.bad valve/valve seat. maybe a lifter is pumping up and hanging a valve.
 
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