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    Johnson 15hp kicks at speed...any ideas? (Video)

    I have a late 70's Johnson 15 outboard that "kicks" at speed/full throttle. This happens consistently and repetitively. If I back off the throttle just a touch, it ceases and the engine runs like a top. I have been told it could be a clutch dog, prop ventilation/cavitation, spun prop, motor...
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    Johnson 15 hp outboard makes noise/kicks at WOT (video) Help me diagnose.

    I have a Johnson 15 hp outboard on a 14ft welded v-hull wide body. At 90% throttle and under it runs excellent, but on full throttle it makes a noise as if its hitting a rev limiter. I ran 93 octane through it the last time on the lake and the motor kicked at full throttle. Thats the best I can...
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