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    '98 Mercury 9.9 blowing smoke from telltale

    Has anyone ever heard of this? This motor runs on the bottom cylinder only. Bottom plug looks normal, top plug looks "very clean". Both cylinders have spark. Compression is 100, top, 105 bottom. I quite sure it is smoke and not steam. From what I can see there is no head gasket, head and...
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    Not your usual "no spark" problem, '87 Yamaha 9.9 , 4 stroke

    I've been following this forum for years and have found a wealth of great information here. Thanks to all. I now have a problem that i just can't figure out. With the plugs removed they won't spark if they are grounded to the engine block. They WILL spark if they are held away from the block and...
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