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First recorded activity by BoatBanter: Jun 2017
Posts: 459
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Yanmar Offers a Turbo Diesel Outboard
John H wrote:
On Thu, 12 Oct 2017 19:54:25 -0400, Alex wrote:
Keyser Soze wrote:
On 10/12/17 12:15 PM, wrote:
On 12 Oct 2017 13:51:41 GMT, Keyser Soze wrote:
Here's a real world example of the diesel vs gas engine trade off. Our
old Bertram 33 had a 320 gallon fuel tank which seems like a lot but
it had 454 gas engines which burned 35 gallons per hour. Cruising
speed barely reached 18 knots on a good day. Doing the math, you come
up with a safe fuel range of less than 140 miles, not enough for
offshore canyon fishing in the NY area. Converting to diesel engines,
the burn rate drops to about 20 gallons per hour, and cruising speed
climbs to 23 knots or so, for a fuel range of around 300 miles. That's
a big difference in the capability of the boat and has nothing to do
with the price of fuel or reliability.
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About $75,000 to $100,000 for removal of gas engines, engineering,
plumbing, new pair of 250 to 300 HP diesels. If gasoline is three
bucks a
gallon, the conversion would cover 25,000 gallons of gasoline. Ouch. ?
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The whole point of my comparison excercise was to show that increased
fuel range with diesel is often the deciding factor as opposed to fuel
cost savings.
Oh, I agree with you, and on a 30+ footer, one or two diesels usually
are a better choice, especially on a heavier boat
Brilliant!
Would you expect less from one who has twin Volvo diesels on his trawler (undoubtedly a 30+ footer)!
Not for a minute.
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