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  1. 9

    Mercruiser 7.4 Starter Grinding

    Hey all, I've been working on a 93 Mercruiser 7.4 and the starter is grinding when I try to turn the engine over with the spark plugs in, with the plugs out the starter won't grind. I've already replaced the main power switch, starter, starter solenoid, 2 new fully charged batteries, and I went...
  2. 9

    Mercruiser 5.7 Stuck Spark Plug

    Hi there all, I have a Mercruiser 5.7 and what I thought would be an easy spark plug replacement has turned into an absolute nightmare. I'm an experienced auto mechanic but don't have quite as much experience in marine engines. I went into the job thinking it would be the same as replacing the...
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