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Old 15 July 2013, 15:03   #11
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Loco I never did work out exactly what you meant for the 15.

Anyone else running a yam or mariner 15 on a 3.5m or similar SIB give actual WOT consumption?
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Old 15 July 2013, 15:14   #12
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"Loco I never did work out exactly what you meant for the 15."

What loco was saying is this....

15 HP times 12% of that is the fuel use at WOT in GPH for a two stroke.
15 X 0.12 = 1.8 GPH

Or sometimes its easier to think of it as 8.33 HP per gallon of fuel used per hour for uses of various HP motors and/or at partial throttle settings.

So with a 4 stroke that would be more like 12 HP per gallon of fuel used per hour.

Hope this helps
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Old 15 July 2013, 17:58   #13
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Quote:
Originally Posted by smitty477 View Post
15 HP times 12% of that is the fuel use at WOT in GPH for a two stroke.
15 X 0.12 = 1.8 GPH
And those are US gallons of 3.8 litres each...

Another way to look at those figures is about half a litre per HP per hour for a 2-stroke running flat out.
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Old 16 July 2013, 01:48   #14
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Originally Posted by John Kennett View Post
And those are US gallons of 3.8 litres each...

Another way to look at those figures is about half a litre per HP per hour for a 2-stroke running flat out.
That sounds about right for my 2 stroke Yamaha 40.
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