Sabre 362 motors too slowly... Prop issue?

[Tash362]

Trying to gauge how slowly I move under power versus other boats, and what I might be able to do about it.

I've got a 1993 Sabre 362 with a Yanmar 3HJ, 38 hp @3800 rpm. The prop is a 16" 3 blade MAX feathering prop. I've had the boat for just over a year. Sails beautifully, but can't help but notice I just don't move well under power. From what I've read, 2800-2900 rpm represents a good cruising level of throttle. At that level, I do about 4 knots in calm water. Maybe I can pick up a 1/4 to 1/2 knot if I nudge it just above 3000 rpm.

But I feel like I should be able to hit 5 or 6 knots at cruising speed. Other sailboats always seem to pass me by.

Anyone experience something similar? Thoughts on how to address the problem? Is the lack of power just something I need to learn to accept with a feathering prop?

Thanks for your suggestions