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    90 HP Yamah***

    We are having problems with our 90 HP Yamaha fouling plugs. (Light coating of oil on them).<br />Is removing the oil injection system an option ( I think its getting too much oil) and just mixing the gas and if so should it be 50:1. Comp readings were 98,95,92 from top to bottom. Should we be...
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    Yamaha 90 HP Jet Drive low RPM's

    We recently purchased a 93 Yamaha 90 HP with a jet drive. (Model # 90TJRR Ser # - 6H1 L 485331) and are unable to get over 3000 rpm's with it. It seems like there is an rpm limiting device as the engine runs fine at low rpm's. We have double checked all fuel connections and the carbs were just...
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