Join Date: Dec 2004
Thanked 55 Times in 55 Posts
Rep Power: 12
Re: Yanmar 2QM20 Idle RPM's
The continuous rating of the 2QM20 is 3400RPM and the maximum rating is 3600RPM.
Idle RPM of 800 to 900 RPM is good (you can adjust it to any comfortable value and if it runs smooth at 850 that's where I would put it).
I recommend cruising at 60 to 70 per cent of the continuous rating for efficiency. That's 2040 to 2380 RPM.
The web makes everywhere the same place. - Fred Reed, from "Fred on Everything"