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I found the log book at last (long story) and have done my sums. <div>With my 20 horse long shaft Yamaha, and the 4 blade 9.25 x10 prop, we used on average 2.71 litres per hour over a total of 63 hrs motoring. Mostly "pushing to get somewhere" rather than slow pottering into harbours etc. When I bothered to record rpm, it was mostly 3200 to 3600.</div><div>Average chart distance based speed was 5.7 kts, which is higher than I expected. </div><div>Certainly the new prop gave a more relaxed motor sailing experience when we motor sailed in lower winds.</div><div>I expect if I ran slower I could decrease the consumption, but we usually have the engine on because we want to get somewhere!. Dagnall</div><div><br></div>
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