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    MFS6C starts fine, idles fine, 1/4 throttle fine, full throttle runs bad

    2014 6hp with low hours. New fuel filter. Valves properly adjusted. Compression at 45+ with decompressor (I believe) Carburetor ultrasonic cleaned. New spark plug. New impeller. Good 87 octane no ethanol fuel. Oil at proper level. Anything over 1/4 throttle and it shakes and sputters like fuel...
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