losing RPM's after running for a while
#1
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Join Date: Nov 2003
Location: Osage Beach, MO
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losing RPM's after running for a while
I'm lossing power on my port engine after running fairly hard for extended times. The RPM's start slipping off after running for about 20 minutes in the 4000 range. Just had the drive refurbished. The starboard engine runs strong the entire time. TRS drives, 454's carbed. Just bought the boat last October and never ran it hard before the drive was rebuilt. Any ideas? Is this caused by something setup wrong in the drive?
#3
Re: losing RPM's after running for a while
one more thing to check... oil level... if too high, over time the crankshaft will have a tendacy to aerate/foam the oil which then causes additional drag on the cranksaft as well as possibly causing the lash adjusters to bleed down....