13 Meter MPG-NPG

[Lake Lizard]

Hoping if there is anyone out there who may have some knowledge for the fuel consumption for a 13 Meter Express with the DD-671t. Saw a review with some numbers for the 692s. Seemed high. Interested if anyone has real numbers for the smaller motors, both cruise and hull speed. Floscan?

[prowlersfish]

Depending how you run it I would say .5-6 mpg baby it and mix in some hull speed running you may get up to .7 mpg . The fuel burn of the 671 and the 6v92s would be about the same at the same speed no real difference other then your carry a little extra weight with the 92s . Where the 6V92 will burn more is when you start running faster then the same boat with 671s .

At say 20 knots both engine will burn the same as it takes the HP and there by the same amount of fuel to push the boat 20 knots

[RWS]

Can't help on the 13 meter, however keep watching on my 10 meter (shares the same Deltaconic hull design) with Yanmar 6 cylinder turbodiesels as soon as the final calibration comes back on the floscans, and we dial in the props.

Last run to Key West fully loaded with 8 adults on board was 1.29 @ 21 kts based on GPS nautical miles and actual fillup to fill up.

RWS

[prowlersfish]

I would bet the 13 meter is close to 2x the weight of the 10, they are one large boat and the DD 2 strokes burn more fuel then 4 stroke yanmars or cummins per hp . Just the nature of the beast .

[prowlersfish]

Dougnash has one with 671s I sent him a pm hopefully he will respond

[Lake Lizard]

Thanks for the responses. I am aware of all the things that can and do effect your fuel burn (seas,dirty bottom, props etc) . Just curious, I ran a 42 Post (no tower) for a couple years with 971N and could run 18kts and get 1ktpg, 3ktpg trolling. The weights are close, the Post mat be a bit heavier. Is it hull design?

[prowlersfish]

The 42 post is a easier hull to push at speed as it is pretty flat at the stern . The 671N is only about 300hp max . the 671TA or TIB in the 13 meter is 450 or 485 hp . I know the 43 post w the 450hp wont get close to 1mpg @ cruse ( a friend had one w/tower ) Of course the 43 is a heavier boat . I almost bought a 42 a few years back .

Hopefully Doug will post his numbers

[DOUGNASH]

I don't have any actual real world numbers unfortunately.

I only filled up my tank once, @ 520 gallons I had no need to haul all that extra fuel with the day trips I was doing.

Later this summer I will definitely have more accurate numbers.

That being said, this is what I found in my manual: