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    Improper prop pitch causing my spark plug to foul?

    Could an improper prop pitch cause spark plugs to foul? If a motor runs at wide open throttle without reaching max rpm's for extended periods of time (10-20 minutes) could this cause the plug to foul?<br /><br />I'm still trying to find out why my motor fouls only the bottom plug?
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    Need Help! 10E75R fouling bottom plug (update, water on plugs?)

    I bought this 12' Sears boat with a 1976 9.9 outboard. My first trip out on the lake resulted in the bottom spark plug fouling after 10 min. of running time. I thought I had a driver coil issue, so I replaced it , new coils,gapped the points at .020", replaced the condensors and replaced the...
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    Sould I re-jet and/or change prop pitch? 10E76H

    12" aluminum boat with a 1976 9.9 Johnson. The boat planes easily with one person. When I get the wife and kids in there it won't plane. I am currently running the stock 9 1/2 X 10 prop. Should I make a pitch change to get better all around performance?<br /><br />I live at 2000' altitude, but...
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    HELP!! Where do I get a "driver coil" for my 10E76R

    Hello Everyone,<br /><br />I ordered the driver coil for my 1976 9.9 h.p. Johnson. My local dealer said one was avail when I purchased it, but now they don't know if they can get one. I have a fishing trip coming up real soon and need the boat.<br /><br />Where else can I get a new one...
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    Help with 1976 9.9 weak spark (ser# 10E76R)

    MY first boat. Fist trip out on the lake and lost spark to one plug. I think I have narrowed it down to the driver or stator coil ( I don't know the correct name)loosing it's output signal (from one side) after 10-15 minitues of usage. <br /><br />I get a weak spark from only one plug. If I swap...
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