Consumption

[Oceanmaster]

Hi all,
Can anyone give me a realistic ball park figure for consumption on an 1999 SCR 2700 Mercury Cruiser petrol fuel engine. 5.7 ltr. Thank you

[shrew]

MerCruiser 5.7 Fuel Consumption 250/260 HP | MPG GPH Test & Specs US Gallons per Hour | MerCruiser 260 engine

Consumption is variable and relative to RPM over time.

[Oceanmaster]

Yes, I am already aware of these things but thank you. I was just wondering about anybody's personal experiences.

[mmwjr]

On my 1997 2400 5.7 Vortec I burn about 10 gph at 3400 rpm.

[Oceanmaster]

Thank you Mike, I was thinking of sailing from where I am berthed on West coast of Ireland home to Cornwall in Uk. Guess I will have to refuel a couple of times. I don't have much info for the boat but thinking it will hold around 80 gallons/360 ltrs of fuel. I am thinking the range/endurance to be only around 200 Nm but a lot will depend on weather/sea conditions and RPM.

[mmwjr]

The 2700 was redesigned at some point, not sure when. The 2000 holds 89 gallons. So yep refueling will be required. I would plan in advance so you know when fuel is available along the route.

[Oceanmaster]

Thank you for the info Mike, I will also chose the long hot days of Summer.
Regards
Liam

[Calguy]

2400 SCR / 8.1 GPH at 3200 rpm on 5.7 MPI / 27 mph.

[Oceanmaster]

Thank you very much for the information, it helps me build a picture of my projected range/endurance. Liam

[jimq26]

This may be of interest to you as well - MerCruiser 5.7 Fuel Consumption 250/260 HP | MPG GPH Test & Specs US Gallons per Hour | MerCruiser 260 engine

[Oceanmaster]

Hi Mike,
When you gave the consumption rate based on your experience, is this in US gallons?
can you also tell me if my fuel tank capacity be measured as US gallons ie, doe it hold 89 US gallons?
Thank you in advance
Liam

[mmwjr]

Originally Posted by Oceanmaster

Hi Mike,
When you gave the consumption rate based on your experience, is this in US gallons?
can you also tell me if my fuel tank capacity be measured as US gallons ie, doe it hold 89 US gallons?
Thank you in advance
Liam

US gallons to both questions.

[Oceanmaster]

Thank you Mike, much appreciated.

[Oceanmaster]

Do I have an indication/gauge on the SCR 2700 for determining when holding tank is nearing capacity and an ullage gauge for FW tank level?

[Oceanmaster]

.....or do I take manual soundings?

[mmwjr]

Neither tank came with sendors but they can be added, RV stores sell them. Currently you can look at the tanks in the engine compartment as they are translucent.

[Oceanmaster]

Thank you for all information. I am reluctant to cross larger sea area with out auxilliary means. If I had a 7hp outboard fitted .....as a get me home/out of trouble....would this be sufficient to move me out of danger? I have 2700 SCR.

[mmwjr]

Hard to answer since I don’t know the waters you will be traveling. The scant length of the outboard will to be long enough to get the prop below the hull.

[Oceanmaster]

Hi Mike,
I will sail from the West Coast of Ireland and travel South, around the bottom of Ireland than shape a ESE course across to Bude North Cornwall UK approximately 200 nm across the edge of the Atlantic Ocean. The 7hp outboard will only be used in an emergency if the M.E. fails and cant be repaired immediately. I plan to modify a bracket on the swimming platform so the Outboard can be attached without too much trouble. The long shaft will be 1.2 mtrs.
The boat is fibre glass and without going into calculation I think the outboard should be able to move me out of any danger.

Regards

Liam

[mmwjr]

Liam,

Thanks for the details however what I meant is having never boated there I know nothing about the wind and current conditions which may overpower the 7HP outboard on this size hull. I would ask locals for their opinion.