M.P.G or GAL per Hr

[sailorman]

Hi guys
as a raggie i read some mobo mags last week i found in a yacht club ( R.N.S.Y.C.
Lowestoft).
Now raggie survey on fuel consumption of mobos how many Lts per Hr????.
i do 3 Lts per Hr

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[Talbot]

if you include TCM, you had probably better also include tons/hour

and another useful one would be breakdowns/month. /forums/images/icons/smile.gif

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[boatone]

u a raggie...wot u doin ere in our mobomess?
3 litres/hour....wot you got a two stroke lawnmower engine? Blimey you'll be quoting hours per litre next../forums/images/icons/laugh.gif

REAL mobos dont pay too much attention to consumption....its lots and they dont want to depress themselves working out how much that quick lunch on the IOW really cost.

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[sailorman]

37.5 Hp x 1500 cc digger engine

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[boatone]

close, wasn't I ? /forums/images/icons/laugh.gif

I actually do have a mobo on the Thames but I dont know the consumshun in metric or wotever. I do know i filled the tank back in May and Ive been out every weekend plus a 16 day and a 9 day trip and its still two thirds full !

'spose that sort of means i could quote less than 10 gallons a month or one and a half litres a day........

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[Deleted User YDKXO]

Litres/hr or gallons/hr is a meaningless figure for boats in the same way as its a meaningless figure for cars unless its related to distance. Nautical miles per gallon/litre is the only true measure of fuel efficiency

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[sailorman]

7.5 N mls in my case.
i noted some mobos doing less that 1.5 N mls or around 40 gal per hr

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[DERF]

Just had EDC engine readouts fitted and @ 25knts read 75ltr/hr and @ 34knts 103ltr/hr... can we swap?

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[sailorman]

guess u should change your handle to DERV

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[BrendanS]

7.5 wots?
1.5 wots?

How do you get to 40 gal per hour. It depends how fast the vessel is?

If the Mobo is displacement, it might be best off at 4 or 5 knots. If it's a planing, might have max efficiency at 20, 25, 30 knots etc.

Mine does approx 1 litre per mile at 30 knots. 4 hours to Salcombe from Solent at this speed. Most bigger boats would cruise slower, so take more hours there at higher consumption. Ask the right questions, get the right answers??

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[jfm]

About 0.7mpg, and an additional 0.6 ish gph for the generator.

That's nautical miles per imperial gallon, and at say 23-25 knots cruise/1700rpm. Flat out 2350rpm 33ish knots would be loads more I suspect

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[tcm]

no idea matey poops. I make sure swmbo pays the fuel bills. The fuel computer thingy is reassuringly busted, or perhaps it need sorting out, but i haven't tried it.

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[NorthernWave]

240 litres an hour at cruising speed (20 knots)

Shocking as that seems I don't care as I don't pay for it!!! )

The SY next to me burns 320 at cruise which is 11 knots

(although she is 170ft and I am only 70ft)

Chris

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[KevB]

I average about 40 ltrs an hour per tank of fuel. This includes 3/4 of an hour each way at 8 knots or below per journey going in and out of Chichester harbour.

Or, about £100 of fuel to 14 hours underway.

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