Lucia 40: Lucia 40 with Yanmar 3YM30AE - Cruising RPMs

[SailBlue]

The Lucia 40 manual states that when equipped with a Yanmar 3YM30AE the cruising RPM should be 2,000. According to Yanmar, this engine should be ran 70% of the time at max speed- 400 RPM, which would be 2,800 RPM (Max RPM for this engine is 3,200), recommending also 4-5 mins at WOT every 30 minutes.

Any idea why the Lucia 40 manual lists such a low RPM for cruising ?