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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Range of Small Engines when motoring...only.
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Thread: Range of Small Engines when motoring...only. Reply to Thread
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Topic Review (Newest First)
06-02-2007 01:32 PM
PapillonDory Thank you guys, all of your answers put togeather gives me a pretty good idea as to what I would need to get to where I want to go....without worrys about having enough fuel onboard.

Thanks againl.

Mike
06-01-2007 12:58 PM
Brezzin I'm with sailhog on this. 200 miles in perfect conditions.

A yanmar 2gm (15hp 2 cyl) would burn about half to three qtrs of a gallon per hour at WOT. Variables would include sea state, wind speed and direction along with boat characteristics. Depending on the boat, you can do anywhere from 5 to 7 knots WOT.

(WOT=wide open throttle)
06-01-2007 12:42 PM
sailortjk1 I can tell you that we spent last weekend motoring for 180nm and used approx 12 gallons of diesel. (Different boat, different conditions)
06-01-2007 12:28 PM
sailhog PapillionDory,
I'd guess 200 nm. I'd guess that engine would go through 1/2-gallon of diesel per hour. Twenty gallons gives you 40 hours, which, at 5 kts is 200 nm.
Sailhog
06-01-2007 12:28 PM
Bump
Small engines

When I talk to my power boat friends (yes, I do have a few) they talk about gallons per hour. I talk about gallons per season. I have a 28 year old 15HP Yanmar with a 20 gallon tank. I fill it up in the spring, use it 70-80 hours and then top it off in the Fall. How many miles that works out to be ????. If you are doing coastal crusing on tank will get you where you need to go. Serious off shore stuff you might need a jerry can or two. Helpful??
06-01-2007 12:11 PM
FrankLanger My sailboat boat is quite similar to your example, overall length 30 feet, waterline length 25' 6", beam is 10'6", draft 5'10", displaces 9,000 lbs, engine is a 16 hp diesel, fuel tank 15 gallons, cruising speed 6 knots. Although I haven't tested it, the manual says I can go 175 miles per tank of fuel. Of course this would depend a bit on conditions--current, waves, wind, etc.
On most sailboats, the engine is called "auxilliary", with the sails being the main mode of transport, so I figure if I can get 175 miles, that will get me out of most "spots", and to my next destination if I can't sail for some reason.
Hope that helps.
Frank.
06-01-2007 11:22 AM
PapillonDory
Range of Small Engines when motoring...only.

I guess what I am wanting to ask here is what is the range of sail boats when only the motor is in use. I see a lot of different size engines mentioned and fuel limits....example follows:

Engine Mfg: Yanmar
Engine Type:
Engines: 0
Fuel Type: Diesel
Fuel Capacity 20 Gallons
Engine Hours: 0
Horsepower 17 hp
Cruising Speed: 5 knots
Max. Speed: 6 knots
Hull Material: Fiberglass/Composite
Passengers: 0
Sleeps 5
LOA: 30 Feet
LWL: 24.9 Feet
Beam: 10 Feet
Draft 5 Feet
Displacement: 8000 lbs

Does anyone have a good guess at the range of the above example?

Pretend there is no wind today.

 
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