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    Not running on all cylinders?

    2002 Yamaha 115 hp F.I. 4-stroke w/72 hours sounds and feels like its not running on all cylinders; WOT yields 4200 rpm and 30 mph max; normally runs 45 mph WOT; no obvious water in fresh gas. What could be some reasons for this? :mad:
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    4-stroke running erratically

    I have a Yamaha F115 4-stroke with approximately 75 hours on it. Recently, the motor began to idle roughly and seems to "load up" on acceleration. If I back off the throttle a little, it seems to catch up, but still runs erratically. The fuel filter shows no evidence of water in the fuel...
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