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    Mercruiser V6 4.3lx thermostat removal

    Re: Mercruiser V6 4.3lx thermostat removal Motor is a 1991 Mercruiser V6 4.3...
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    Mercruiser V6 4.3lx thermostat removal

    My boat is 20 years old and I just cleaned the exhuast elbows and installed new gaskets on her. I never have had a over heating problem, but decided that after 20 years I would put a new thermostat in it. I bought a Quicksilver thermo kit and pulled the top cover plate off, the gasket was left...
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    Loud knock and engine lock up on start up...

    I have a 1991 Mercrusier V6 4.3lx i/o. I have always had run on issues when turning the engine off, even on 91 octane. I was advised to check the timing. Timing was at 0 degrees. I adjusted it to the factory setting of 8 degrees BTDC, also put in oem spark plugs gapped at .035. The idle went up...
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