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  1. R

    fuel or electrical?

    I have a '96 90hp 3cyl Merc' . At WOT it will run well for awhile then cut back very suddenly (about 1500rpm). It will then pick back up and run normally again. At idle I've checked spark and its ok and compression is ok. I decarbed it but haven't got to try it in the lake again. It seems...
  2. R

    adjusting carbs

    I have a 90hp Merc three cylinder that makes an unusual noise at low forward speed. It kind of rattles. The noise stops when rpms are increased or its shifted into neutral. I've retimed it and checked carb synchronization. When I tried to adjust the carbs according to the service manual, the...
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