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    98 Mercury 150 running issue

    You indicate black spark plugs. Possible detonation? The serive manual about detonation: A few of the most common causes of detonation in a marine 2-cycle application are as follows: a. Over-advanced ignition timing. (1.)Use of low octane gasoline. (2.)Propeller pitch too high (engine RPM below...
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    Mercury 150 EFI (2001) VST housing fuel (pump) leakage

    Hello, I have a 2001 Mercury 150 EFI, unfortunately with fuel leakage at the contacts (+ and -) of the Electric Fuel Pump in the Vapor Separator Tank (VST). As soon as I turn on the ignition and start the engine, it sprays out of there (see blue circles in 2nd picture), I think due to pressure...
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