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    No oil pressure on gauge: 3.0L

    I have a Mercruiser 3.0L with SN 0W334198 in a 2005 model Sun Tracker pontoon which just started showing no oil pressure on the gauge. I just replace the starter/solenoid and am wondering if I disconnected a wire to the oil pressure sender. I need to know where the oil pressure sender is...
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    What is plug gap for old (pre-1979?) 9.9 HP Mercury

    I have an old (I believe it is pre-1979) Mercury outboard that is a 9.9 HP using NGK B7S spark plugs. The color of the motor is white. What is the correct spark plug gap for this motor and plug? How do I determine the date of manufacture? Thanks.
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