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Old 04-11-2014, 08:46 AM   #7
Vashon_Trawler's Avatar
City: St. Petersburg, Florida
Country: USA
Vessel Name: M/V Sherpa
Vessel Model: 24' Vashon Diesel Cruiser
Join Date: Jun 2013
Posts: 583
This is treading on a very touchy subject concerning overloading marine diesels There is a lot of good debate/discussion on this forum, which I encourage you to read carefully.

I'm just offering my opinion here, but I have taken the stance that it is not healthy for most marine diesels to reduce RPM to compensate for an overloaded engine. I also like to have enough reserve HP. My diesel's factory rated WOT under load is 3200-3600, so I've installed a prop that keeps me on the very upper end of this range. My typical cruise RPM (2900 RPM) assures my Volvo Penta is a little over 50% load.

Opinions vary so do a search on the forum--great info here!
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