Fuel economy..... with Yanmar 2GM14

[bluepippa]

Had a great trip to cherbourg last weekend, but motored most of the way and back. The good news is it gave me a chance to realy monitor the amount of fuel used in a flat calm sea.

I have a 25 litre tank with 10 litre reserve. The main tank lasted for 10 hours before getting dangerously low.......

So a 21 year old Yanmar 2GM14 (14hp) fitted in a 30 foot jeanneau manages 2.5 litres per hour at cruising speed (ie pretty much full wack)

How does this sound? do I need to get the engine tuned, or is this a reasonable figure.

Cheers

 

[duncan]

I wouldn't use this as a measure of the engines state but the 2.5l/ph is consistent with a diesel working at 12hp.

 

[wrr]

This sounds fine. Also motored from Cherbourg Sunday, 5-6 tons, 24 ft lwl, 2GM20F, 6 knots, 2850 rpm, 2.25 lites/hour.

 

[charles_reed]

2GM20

I calculate my 2GM20 (14 years old) at 1.75l an hour.

The boat is very easily driven, it's fitted with an Autoprop and I motorsail a lot.

In fact I don't bother to dip the tank but use that figure to fill up.