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2004 225 yammamerc 4 stroke bogging down at 2500RPM

Fla Outcast

New member
Engine runs fine up to 2500 rpms. Idles very smooth. new fuel pumps, compression good, oil sensor replaced, vst filter replaced, injectors blown out, compression good. Mechanic has been replacing parts to no avail to the point of where a new engine would have been a better option. Said they checked it at high speed (but didnt do it under load)
Once throttle hits about 2500 engine starts bucking and losing RPM fast. Throttle back and it returns to the normal smooth-running, well-behaved engine.
 
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