Quote:
Originally Posted by Seasalt
I had browsed the "'gas or diesel thread but did not find much on actual fuel consumption based on experience. I missed the information that "bastonjock" posted on Dec 23, 2008:
"My buddies prout sirrocco uses about 1 liter per hour at 5knots using a 15 year old diesel,the equivalent gas engine on a sirrocco a 9.9 yam burns 2 liters of gas per hour to do the same speed,so its either 0.60 an hour or 1.90 an hour,you can save your mooring fees if you run on diesel."
The information posted by Boatpoker was very helpful because it indicates a much lower fuel consumption than I had been told for the Perkins 6-354. One broker told me to expect to burn 5-7 gallons per hour with twin 6-354s. He didn't say at what speed, so it is helpful to know that Boatpoker could make 7.5 knots at 1600 RPM with one 6-354 in a 38' trawler. It's hard to find specific information like that. I'm hoping that others will have similar reports.
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the energy density of disel fuel is approximately 30% greater than with gas so it can do more
work but the high cost of disel engines sorta offsets that. My preference is for disel because of thier low end torq and fuel efficiency even though i understand they are more expensive than gas engines