Peter
Well-Known Member
Any out there got a figure for fuel consumption of this engine. Ideally real life, not brochure. Normally run about 2000rpm
Thanks
Thanks
Volvo MD 22 fuel consumption
- Thread starter Peter
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PaulRainbow
Well-Known Member
Without knowing the boat that it's in, i doubt anyone could help.
Old Harry
Well-Known Member
normal rule of thumb, 1 ltr per hr per hp used
Davy_S
Well-Known Member
Hoolie
Well-Known Member
Eek! Our Perkins equivalent uses 2 to 3 litres at about the same revs. Through the French canals at minimum throttle we were using a lot less. But we do have an Autoprop that improves fuel economy.
whiteshythe
Well-Known Member
My MD22P has averaged 2.8 ltr/hr over the last 1000 hours, in a 40ft boat at an average speed of 5.6 knots at 2000RPM.
sailaboutvic
Well-Known Member
Our 42 foot MD 22P 1800rpm 2lph 2000 rpm 2.5 LPH
I keep a very close eye on this , my filler is in the cockpit floor , so I tend to fill to the top of the filler then next time do the same and compare with engine hours .
I keep a very close eye on this , my filler is in the cockpit floor , so I tend to fill to the top of the filler then next time do the same and compare with engine hours .
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sailaboutvic
Well-Known Member
Hi can I ask what boat and prop you have ?
We have a Brunton three blade auto prop and at 1800 rpm unless running in big seas we can easy get well over 6 kts
macd
Well-Known Member
scottie
Well-Known Member
That’s funny it used to be rule of thumb 20hp/gallon (4.5ltr)/hour for real hp usage
Old Harry
Well-Known Member
whiteshythe
Well-Known Member
Hi Vic,
My boat is a HR39. I have a 3 bladed Variprop. The figures I have given are based on more than 1000 hours motoring under all conditions. In flat water with no wind, I achieve 6 knots at 2000 rpm, but the opp asked for 'real conditions', and most of the motoring I do is motorsailing to windward in less than favourable conditions.
sailaboutvic
Well-Known Member
Hi thank s for that info , funny how there so much different , our Moody 42 I guess is heavy then the HR !
plus being a full time cruiser we well over loaded with ever thing under the sun included rolls or canvas and window plastic .
since having the boat three years now I keep a close eye on fuel and lucky for us we can fill to the top of the filler ,
Our gen we estimate use 1 lph last time we filled was In The south of France I estimated 104 litres we took on 109 litres
We very rearly need to push over 1800RPM , honestly if there another wind to move us 2 kts we like to sail unless we really got to get some where .
We do dive ever week and clean any thing that may be on the hull .
Almost the same prop too .
Old Harry
Well-Known Member
Not really relevant to the OPs question, is it
sailaboutvic
Well-Known Member
My fauit I asked the question and drift off thread a bit , but I was interested why there was so much different in LPH
seasicksteve
Member
I have an MD22L in a Bavaria 40 Ocean, reckon I use about 2L/hour, typically run at 1800-2000 RPM, 3 blade prop averaged over half a season. Not a very accurate figure as my hours meter doesn't work (or at least is invisible) and I have used some fuel for heating and charging, so could be a bit less.
Steve.
Steve.
Bobc
Well-Known Member
That engine uses about 3l/hr at 2k rpm.
You do know however, that this engine should be run harder than that.
You do know however, that this engine should be run harder than that.
Heckler
Well-Known Member
On the trip down from Holyhead to the Algarve 6 yrs ago I did an average calc and mine in a Bene 381 does 1.8 ltrs an hr. Runs between 1800 and 2100 rpm when motorsailing to average 6kts
sailaboutvic
Well-Known Member
Harder then 2000 rpm ?
How harder? ,
cose any hight rpm wouldn't increase speed on mine , 2000 rpm give me 7.5 kts in the right condition, so why would I want to thrush it harder just to waste fuel?
My exhaust elbow come off every year and there no build up of carbon.
What important is you don't run these engines at the same RPM for long periods,
Also I sorry but I disagree, I don't think you can be any more accurate when checking fluids then topping all the way up then after X retopping up . Which is what I do .
I think the fuel consumption depend on the hull , how clear it is, shape,and the prop.
A dirty hull will be slowly and use more fuel .
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Bobc
Well-Known Member
It is a car engine which revs to 4300rpm.
Recommended cruising revs is 3,000 - 3,300, although that's a bit much, but at least 2,500.
Run it at 2,000rpm and it's not getting up to full working temperature.