15 Hp 2 Stroke How much Fuel ?

Discussion in 'Outboard Maintenance' started by noeettica, Aug 5, 2009.

  1. noeettica

    noeettica Well-Known Member

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

    Dave
     
  2. firecat1981

    firecat1981 BBA Counselor

    5,051
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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.
     

  3. Brett

    Brett > PRO STAFF <

    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)
     
  4. noeettica

    noeettica Well-Known Member

    I knew I could count on you ...

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

    Dave
     
  5. Tom_C

    Tom_C Well-Known Member

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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]
     
  6. redgheenoe

    redgheenoe Well-Known Member

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    Or....
    10hp [smiley=40s.gif]
    15hp [smiley=40s.gif] [smiley=40s.gif]
    25hp [smiley=40s.gif] [smiley=40s.gif] [smiley=40s.gif]
     
  7. Brett

    Brett > PRO STAFF <

    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:
     
  8. TomFL

    TomFL Well-Known Member

    Shazam!

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

    -T
     
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