Thread: Under propped?
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Old 03-27-2014, 09:21 AM   #37
Vashon_Trawler
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City: St. Petersburg, Florida
Country: USA
Vessel Name: M/V Sherpa
Vessel Model: 24' Vashon Diesel Cruiser
Join Date: Jun 2013
Posts: 583
I've gone through two or three props to find my diesel's sweet spot--best thing I did was reduce my prop's pitch and bring everything within specs. WOT for my Volvo MD2030 is 3600 per Volvo specs (3200 - 3600). I cruise at 2900 RPM which is 80% WOT or 52.6% load according to Volvo's load/RPM graph. Volvo recommends 300-500 below WOT for cruise but this is simply too noisy and uncomfortable.
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