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  1. S

    4.3l lx help . runs slow

    I have a 95 4.3l lx mercruiser runs slow . top speed is about 30 32 mph at about 3800 rpm. Thats is WOT. Carb was rebuilt last year. Didnt help. Runs rich. Diesels when shuts off sometimes. 14.25 21p prop . its also a truck block. Previous only f***ed me over. Why am I only getting 30mph. Me...
  2. S

    Issues with timing, carb or both

    Boat has a mercruiser thunderbolt 4. 4barl carb. It was a 1995, but has a truck block from previous owners. Plastic cover with notch. I think timing is set wrong, since it has no marks. Might be 8* atdc. And issues with stumble when taking off. First from dock, in no wake zone for a while...
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