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Gallons per hour on Yanmar 27HP

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yanmar
7K views 8 replies 6 participants last post by  2Gringos 
#1 ·
Thinking of buying a catamaran with dual Yanmar 27HP. The boat's tank is 50 gallons which seems small to me. How many hours should I expect to get, running single engine at a time, in normal cruising speed (assuming sail is down of course)?
 
#3 ·
Without knowing which Catamaran you are talking about, any answer would have a huge Fudge Factor, but typically, a roughly 27HP Diesel engine under near full load will consume between 2-3 Liters per hour. So mix in a little Fudge, that would be 2-3 Quarts per hour, or ~75 hours on a 50 Gallon tank; give or take 50%, on alternate Sundays.

¬Erindipity
(My little boat gets around 15MPG at 5 Knots; at around 1.75 Liters/hr. The Powerboat next to me uses 3GPH, going three times as fast, and it can probably make the Kessel Run in less than twelve parsecs.)
 
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