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Old 12-04-2013, 09:39 AM   #18
Larry M
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City: Jacksonville
Join Date: Nov 2008
Posts: 11,682
The Kady Krogen 42 originally came with the Ford Lehman 120 then in ~1985 changed to the SP135. Later they came with either Perkins, John Deere and a few others but all 130 hp plus.

Fully loaded (44,000lbs) we need a little over 87 hp to reach a hull speed of 8.4 knots. To cruise at 7 knots we are only using ~51 hp. This assumes clean bottom, no wind, no waves, etc. We have 2 alternators and paravanes so the numbers would be a little higher but we are still not using the hp we have. The only time we have come close to using it is when we have towed other vessels and once when we were soft grounded and we able to power off. If we were to repower, I would probably go with ~100-110 hp.
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