On Fri, 31 Aug 2007 17:41:47 -0700, druid wrote:

I'm looking at an Islander Bahama 30, and it has a Volvo "20hp MD73"
engine. Now, if I assume he means MD7B, anybody have the specs for that
engine? Google shows hundreds of boats for sale with that engine, listed
as anything from 12hp to 20hp. RWC or FWC? RPM? HP? 2-cyl?

I had a MD7B that I purchased new in 1977 or thereabouts. At that
time it was rated at 13 hp. It was 2 cylinders, raw water cooled, and
had a separate alternator (not a Dynastart like the MD1). Mine was a
repower in a 28 ft Westerly weighing around 7,000 lbs. It had plenty
of power for that boat.

Apparently Volvo found ways of increasing hp over the years bur I have
no experience with that.