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2005 50hp 2-stroke no acceleration

checkmate79

New member
Here is what I have, 2005 50hp Yamaha 2-stroke, 3-cyliner oil injected. At idle it runs great, and if you slam the throttle down it revs up and runs great at wide-open under load, however, if you try to ease up through the RPM it bogs out and dies, if you ease back down from wide open it still runs great as well.

Fuel is clean, has great spark, compression of 100lbs on each cyliner, leak-down of 98% on each cylinder, timing advances through the range. I have adjusted the carbs every which way with no avail but the plugs show rich run condition.

Any ideas?
 
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