I have done a lot of dynomometer work on outboards, unfortunately most was
on a few mercury models used for hydroplane racing. The older 50 hp 4 cyl.
from late fifties to the eighties would dyno, at the motor, not prop, 40 hp.
41 hp would be rare. The 3 cyl. 65 hp, would be about 62 hp.
Dixon

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"Bob La Londe" wrote in message
...
I'm thinking about getting rid of my old Force 50 on the little boat and
replacing it with a more modern outboard. I know that not all 50HP rated
motors will develope exactly 50HP. So, whose motor is most under rated?
I
have enough weight in the boat that every pony under the cowling makes a
difference.



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