by Kurt Sacker
(Torch Lake, Michigan, USA)
Engine has lost about 1200rpm at WOT. Was 5400rpm. Now 4300rpm. Also, Engine starts out at 4800rpm and drops to 4300rpm. Once it's hot, it stays at 4300rpm. Did the same thing when it was in the 5400rpm range. Prop is fine. Tried another prop, no change. All spark plugs, fuel filters, VST filter have been changed. Fuel is fresh. No change to boat weight. Engine idles and runs beautifully with this excpetion...