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Old 09-28-2020, 12:59 PM
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christuna
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Originally Posted by saltwaters View Post
I used to have a 16 ft lake style aluminum boat with a 40 hp evinrude 2 stroke engine. I couldn't believe how much fuel that thing used. I used to take it offshore in Ca (15 miles or so) so I'd put 30 or 40 miles on it. I brought 2, 5 gallon and one 10 gallon fuel tank with me for those trips. I hope your engine doesn't use that much fuel.
I don't know what to believe in anymore. I guess i'm just gonna have to buy it and find out for myself I guess.

I've been watching speed tests of small boats with outboards on youtube and here's the "data":

40hp Yamaha: 33 mph / 4 Gallons per hour = ~ 8.25 MPG

10hp Mercury on a 16' boat: 19 mph / 1 Gallon per hour = ~ 19 MPG (!)

But then I read about horror stories like yours:

Correct me if I'm wrong but here's what I gather from your data: 35 miles / 15 gallons = ~ 2.3 MPG

That's appalling.

Of course it all depends on the state of the engine, timing, reed valve? etc...

I also checked the method of dividing the horsepower by 10 to get the consumption at wot and the g/kwh figure looked good.