Engine performance

bigriver 74

New Member
Jul 10, 2015
5
NW Wisconsin
Boat Info
1998 Sea Ray 190 with 5.0 L engine that was replaced 2009 with rebuilt engine
Engines
5.0 L Mercruiser Alpha 1 engine
Have a 5.0L Mercrusier in my Sea Ray. Lately while pulling skiers at around 2900 RPM the engine increases RPM by about 300 rpm while losing power. Throttle adjustment sometimes corrects problem. Ran boat without load up to 4800 rpm and ran great. Fuel filter has been replaced. Looking for causes. Can anyone help?
 

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