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    1991 Yamaha 150 HP

    "I am having trouble maintaini "I am having trouble maintaining idle below 1000 rpm. Prior to launch it ran fine in diveway between 700-800 rpm. Plugs are gaped at .039, timing is within spec, changed fuel filters, primer bulb and anti siphon fittings. Runs like a top on plane, stalls at low...
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