jcody
Junior Member
Posts: 16
|
Post by jcody on May 10, 2023 2:19:56 GMT
I just bought a 2007 54DS and will bringing it down from New Jersey to Florida. Anyone have a good figure for fuel consumption?
Just planning trip and if motoring a lot need to understand where to pull in for fuel?
|
|
|
|
Post by Zanshin on May 10, 2023 10:14:35 GMT
I can't find my actual fuel consumption numbers for my J57, I worked it out once. But 7l/hour @ 1800 RPM which will give you 7 knots or a bit more, in calm conditions, is realistic. With light winds and setting sail, this consumption goes down surprisingly quickly.
That's with a 150HP Engine. I think that Yanmar uses 170 grams per hour per horsepower; that's probably a bit conservative.
|
|
|
|
Post by zaphod on May 10, 2023 16:27:42 GMT
A good starting point would be to print out the fuel consumption chart for your particular engine model. With that you will know how much fuel you are burning at a given rpm. What speed you get out of that rpm can vary greatly.
If I was doing a long delivery on a new-to-me boat I would be inclined to sail as much as possible rather than pushing the engine hard. A long delivery is a bad time to discover that the engine has undisclosed issues!
|
|
|
|
Post by Charlie-Bravo on May 10, 2023 17:13:16 GMT
I read many years past , that a reasonable guide is power divided by 10 = Litres an hour consumption at cruise speed …….. quite what cruise speed actually is was not explained, but some delivery trips and just cruising around for weeks on various craft it seems reasonable, but generally I achieved more hours / less fuel used than based on that calculation so it seems safe, perhaps I should be going faster.
Of course turbo diesel’s / modern computer controlled engines might be different .
Whichever basis or advice you use, it’s prudent to stash some spare fuel …… plenty.
CB
|
|
|
|
Post by Don Reaves on May 10, 2023 19:21:23 GMT
I read many years past , that a reasonable guide is power divided by 10 = Litres an hour consumption at cruise speed …….. quite what cruise speed actually is was not explained, but some delivery trips and just cruising around for weeks on various craft it seems reasonable, but generally I achieved more hours / less fuel used than based on that calculation so it seems safe, perhaps I should be going faster. Of course turbo diesel’s / modern computer controlled engines might be different . Whichever basis or advice you use, it’s prudent to stash some spare fuel …… plenty. CB What units of power are used in this approximation? |
|
|
|
Post by Charlie-Bravo on May 11, 2023 7:15:28 GMT
Horses , probably imperial HP as the equation was from long ago but metric I guess would guesstimate to somewhere similar, it’s a rough guide not absolute science, and error seems to be on the safe side .
My little 35 HP engine seems to consume 2.6 to 2.8 L/H the way I like to use it, but would drink 3+ L/H if I ran around at 3000 rpm or more, so seems not far off, perhaps ‘cruise speed’ is ‘racing’ the engine.
CB
|
|
|
|
Post by shenandoah on May 11, 2023 17:50:55 GMT
If coming down on the outside, it makes sense to leave from Cape May, NJ and stop around Norfolk, VA and make sure you have a good weather window to get around Cape Hatteras. If coming on the inside you will need to stop every night.
So, make sure you leave with a full tank. Carefully monitor your hours and no matter what top off at your first stop. Then you will know for sure what you are experiencing.
It is probably close to a gallon an hour, to be safe assume 1.5 until you know for sure. Regardless you should have plenty of compacity to get to Norfolk from Cape May.
Hope that helps.
Warm regards,
Chuck
|
|
