Optimum Running RPM for 18HP Volvo Penta

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BreakAway

I have a First 310 with an 18hp 2002 Volvo Penta engine. When running for some distance (1 hour or more), what is the optimum rpms I should be running at. I usually run about 1200-1500, but heard diesels are meant to be run at high rpms.
 
Jun 4, 2004
89
- -First 310 -
I run mine up to around 2500 rpm, any more and you start seeing some black smoke.

I have a First 310 with the same engine and a fixed 2 blade prop.

Randy
 
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