Our Mainship 34HT has basically 2 cruising speeds ( or better stated that how we run it).
Slow cruise is 8 to 9 MPH at about 1700-1800 RPM
Fast cruise is 12 to 14 MPH at about 2600-2800 RPM
Not much point in between as it's too much fuel for the gain in speed.
When I run at slow cruise for a few hours I try to bump it up to fast cruise for around 20- 30 min. Sometimes its once / short day near the end of a run.
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Don
2008 MS 34 HT Trawler
"Bacchus"
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