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Discussion Starter · #1 ·
Was running my 15 hp Merc today It Uses Right at 2gph WFO Give or take ... Sound about Right ?

Dave
 

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Wide open for 2 hours? were you making one of them "special" runs to our nieghbors to the south?

That doesn't sound to bad to me.
 

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Researched this question a few years ago.

Basic rule of thumb:

Horsepower divided by 10
is the number of gallons burned per hour WOT


10 hp burns 1 gallon per hour WOT

100 hp burns 10 gallons per hour WOT

so 15 hp burns 1.5 gallons per hour WOT



If you want to get picky use these formulas:

An in-tune four-stroke gasoline engine will burn about 0.4 to 0.45 pounds of fuel per hour for each unit of horsepower.

A well-maintained two-stroke outboard burns nearly 0.6 to 0.8 pounds of fuel per hour for each unit of horsepower.

Gasoline averages 6.2 pounds per gallon (depends on type)
 

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Discussion Starter · #4 ·
I knew I could count on you ...

I do not think there is a thermostat in the motor ... lol

Dave
 

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[smiley=1-mmm.gif]taking this one step further.

10 hp    100miles / 18mph = 5.55 hours x 1 gal = 5.55 gals to go 100 miles
15 hp    100miles / 23mph = 4.35 Hours x 1.5 gals = 6.52 gals to go 100 miles
25 hp    100miles / 30mph = 3.33 Hours x 2.5 gals = 8.33 gals to go 100 miles
[smiley=1-crazy-eyes.gif]
 

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taking this one step further.

10 hp    100miles / 18mph = 5.55 hours x 1 gal = 5.55 gals to go 100 miles
15 hp    100miles / 23mph = 4.35 Hours x 1.5 gals = 6.52 gals to go 100 miles
25 hp    100miles / 30mph = 3.33 Hours x 2.5 gals = 8.33 gals to go 100 miles
When you feel the need for speed, be prepared to let your wallet bleed!   ;)

Wanna haul azz? Gotta burn gazz!   :eek:

Saving time costs money.   :cool:
 

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Shazam!

http://www.nissanmarine.com/tech_talk/gas_mileage.html

-T
 
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