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2006 Mercury 60 Bigfoot can't get above 5000 RPM's

bkfreeman66

New member
Hello All,

So let me start off by saying any help on this matter would be realty appreciated. So I purchased a used 2006 Sun Tracker fishin barge 21 from the original owner. The boat has been sitting for a few years per the owner. The motor only has 62 hours on it.

Issues: So the motor cranks right up n issues there. Idles perfect , the minute I engage prop it stalls .
Things we've done = Cleaned out the VST tank / replaced the elec fuel pump and needle / replaced the mechanical fuel pump and lines / replaced both in-line fuel filters / cleaned the injectors / changed all spark plugs / made sure all coil packs are working properly.

We have even moved the motor up 2 holes so that the Cavitation plate is more closely running at proper level.

Result = With just me on the boat top down no extra weight not even a anchor . The boat launches great...RPM's come up to 5200 then as the boat stars to plane out RPM's go down to 5000 @ WOT. boat has the original prop on it a 14X11 Pitch.

Does anyone have any idea as to what could be holding the engine back. I just will not get above 5000 RPM's.

Thanks,

Keith
 
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