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    Gasket Material / Water Pump Impeller Lubricant for Merc 402

    My engine is a 1978 Merc 402. I will be replacing the fuel diaphragm, thermostat, rebuilding the carb and installing new water pump impeller. All parts are ordered and on the way. Question: To replace the gaskets - - I noticed in taking the carb off that the gasket came off in one piece...
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    Mercury 40 HP 402 Runs on one cylinder

    Merc 40 HP 402 <br /><br />Problem:<br />Engine starts but runs on one cylinder. Will run up to 2500 RPM.<br />After engine heats up running this way, the 2nd cylinder will kick in, then the <br />engine runs fine at full speed and idle. <br />Next day the engine is very hard starting. When...
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