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Old 02 April 2012, 05:23   #1
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Fuel economy

Has anyone got any figures on the fuel economy of a 3.80m inflatable with a 30hp 2 stroke? Im thinking a 23 litre tank should be good for atleast 40 miles travelling fairly swift on calm sea.
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Old 02 April 2012, 06:36   #2
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Fuel Economy.

Generally, you are looking at 1 gallon per 10 hp per hour. This is for 2 strokes only. I've found it to be more or less true. Hope it helps.
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Old 02 April 2012, 06:44   #3
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Would that be 10hp in use eg. my motor at 1/3 power or simply a 10hp motor?
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Old 02 April 2012, 13:50   #4
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Although only from its one use yesterday mine used about 1 gallon, that was about 90 minutes or so of messing around so not at WOT much of the time, it also made me realise that the fuel gauge on my tank doesnt work! oh its a 9.9hp!

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Old 02 April 2012, 14:01   #5
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Id say you'd easily get 40 miles out of that if youre not carrying much weight. I was allways amazed by the economy of my Aerotec 380 with a 30 on the back.If I wanted to get somewhere quick, I found the economy would be great if i opened the throttle fully then backed it off slightly but still maintained a decent speed and was kind to the engine.
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Old 02 April 2012, 14:20   #6
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A gallon an hour per 10hp is a full chat, but if you're on the plane and you can back off a bit and stay planing, economy is much improved.
I always work on the gal/ hour plan, then I don't have to worry too much on the way home........
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Old 02 April 2012, 14:22   #7
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fuel economy

Sorry, I meant AT full chat, not A !
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Old 09 April 2012, 03:11   #8
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Well, we ended up doing atleast 50 miles and used about 20 litres petrol. Thats with 2 of us, camping gear and certainly not trying to be economical. Happy with that.
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Old 09 April 2012, 04:23   #9
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I used to love my 3.83 with a 25 on the back - seemed to run on nothing for hours at a time - shame she went else where
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Old 09 April 2012, 05:45   #10
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Actually, it's 1 US gallon per hour (or about 3.8 litres) per 10hp at wide open throttle.
It applies to pretty much every engine.

Four strokes/DI 2 strokes aren't that much more efficient at full throttle but not using them at WOT makes them significantly cheaper to run than a carbed 2 stroke.
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