2455 fuel burn question-gctid370737

[Guest]

I've been messing around with the search feature on the website and on search engines and can't seem to find what I'm looking for.

I just purchased a 2001 2455 with a 5.7/b3 engine/drive setup. I'm trying to figure out how much fuel the boat burns at cruise, or what it's range is at cruise. I've found a reference to around 145miles, but I haven't been able to verify that.

If 145 is correct, that means the boat burns ~13gph at 26kts, does that sound correct?

Jsanders

[Guest]

Cruise RPM is 3800-3900, and it's doing 31-32 MPH in flat water at that RPM. Best fuel economy is with 15% tab, and drive trim about level. In the ocean ours was doing 2.2 MPG and in high altitude/fresh water it was just under 2.0 MPG.

[Don9]

Jsanders wrote:
I've been messing around with the search feature on the website and on search engines and can't seem to find what I'm looking for.

I just purchased a 2001 2455 with a 5.7/b3 engine/drive setup. I'm trying to figure out how much fuel the boat burns at cruise, or what it's range is at cruise. I've found a reference to around 145miles, but I haven't been able to verify that.

If 145 is correct, that means the boat burns ~13gph at 26kts, does that sound correct?

Jsanders

I don't think I can get a 145 mile range. I would be pushing it to get 90-100 miles.

[Guest]

Well, range is 1/3 of your fuel. 1/3 out, 1/3 back, 1/3 reserve. The only way I'd stretch that is a near-to-coast run from one marina to another, where I'd go as far as 2/3 tank as range at most.

So, 65 gallons, about 2.2 MPG, means 143 mile TOTAL capacity. Your true off-shore range should be 1/3 of that or less.

[706jim]

With your boat and engine, I'd use 2mpg for rough mileage estimates and heartily agree with the 1/3 1/3 1/3 mentioned above.

In really horrible weather, your mileage can even be LESS than 2.0 although you would pick some up if you turned around.....

[Guest]

5.7 mpi or carbed?

[ksanders]

Using a number like 2 nmpg or others estimates are great for basic planning.

If you really want to know what your boat gets, with your loadout, in your sea state, you need to invest in a fuel flow meter.

These can be purchased from a variety of manufacturers ranging from stand alone units like the Floscan products, to fairly inexpensive add ons to many chart plotters.

I have found that fuel guages are notoriously inaccurate, and non linear in nature. If we had to rely on our fuel gauge for actual cruising, allot of our best adventures just would not have happen'd.

[Guest]

5.7 mpi or carbed?

Carb. There was no MPI in that year range and model.

+1 on the flow meters, that's how I know my exact numbers. $180 for the Lowrance kit with display and everything, well worth it.