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Old 02-03-2013
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Re: Repower confusion (horsepower)

JR, the old rule of thumb of 4 horses per ton would put you at 52 HP in cruising trim.

Of more importance than the horses is the torque and its curve. Are those horses Clydesdales or Quarter horses.

If the torque curve of the Beta gives you adequate grunt at 2800, you really don't need more. The 4 per ton "rule" goes back to the days when sailboats pushed a lot more water out of the way than they do now. My friends Hunter 38 is probably about 20K Lbs in cruising trim with a Yannie in the 30's - it has lots of power at 2800 in that application - we've never needed to run it to 3000 even when bucking our local currents.
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