FUEL EFFICIENCY

I have just ordered a new 315 for delivery next year.  It seems the 315 is the only Hanse model without a fuel gauge, and Hanse Uk quote £495 to fit one.

1.  Does anyone have information on fuel efficiency - i.e engine running time per litre of diesel?

2.  Has anyone fitted a gauge themselves?

Otherwise the boat seems to have everything, except a grill on the cooker - apparently the Germans do not realise the importance of toast!

tony1 wrote: 1.  Does anyone have information on fuel efficiency - i.e engine running time per litre of diesel?

Hi,

Based on two summer's worth of experience with a 312, the average consumption is pretty close to 1 liter/hour. This is based on sailing habits of only motoring in and out of harbours, and occasionally motoring on calm days at 3000 rpm.

Regards,

Susanne

Hi,

I think 1-1,5 is the effektive Yanmar 2GM20 fuel consumption. You need to remember that you maybe have a diesel heating. Therewith you don't have a hour counter.

I would talk to a local service partner because the gauge cost's 100-200€ (a good one) and it shouldn't take longer than 2 hours.

I think about building in one with a switch also for a water gauge.

Regards Thomas.

Hello

There is a formula for liters per hour over horse, however I have lost it. I think 25 hp is 4 lts or one US gal.

I work on 2 lts per hour,so clock hours on fill up and always have plenty in reserve, when tank is in theory low.

Simon

Tony

I have a 3YM30 on my 312 and the fuel consumption figures at the lower revs seem to agree with those given on the Yanmar website that Andrew mentions above - i.e. between 1 and 1.5 litres per hour.

Without a fuel gauge I was always filling up early as well. The problem is that if you increase the engine revs to overcome a strong head wind the fuel consumption can go up to 3 litres per hour so you have to apply caution to any calculated consumption.

Last winter I fitted a plastimo fuel gauge and sender which from memory cost about eighty pounds. I fitted the sender unit into the tank access hatch which could be drilled off the boat and avoid getting swarf into the tank. The gauge itself I fitted next to (and wired into) the engine switch panel. The only problem I have is it tends to read low. So when the tank is full it reads just over 3/4 full. When it reads empty the tank is still over 1/4 full. I think this may be excessive resistance on the sender wiring so this winter I may try increasing the wire thickness. But the gauge does give an indication of what's left and currently reads on the safe side.

I put a similar gauge into the water tank.

Tank sender fitted to hatch

Sender unit in place

Fuel gauge in Cockpit

Hope this may be of help

Regards

Alan