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Weird RPM issue

5K views 35 replies 11 participants last post by  REdwards 
#1 ·
Testing out the boat today and came across a weird RPM issue.

With just me and gear in the boat it runs fine. starts to plane out at around 4700 RPM and runs smooth at 5300 RPM trimmed up a little.

Now if I put another person in the boat it immediatly drops to 4100RPM and stays at that mark refusing to get on plane.

Take the person out and it acts normally, going all the way up to 5500RPM.

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a few days ago it was planing with 2 people in the boat but today it refused. I would literally drop people off on the dock and it would run fine, pick a person up and the boat would be 15 mph slower and run 1000 rpm slower.

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What on earth is causing weight to affect RPMS?
 
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