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Ethanol free gas vs. Regular with 10% Ethanol


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9 minutes ago, slonezp said:

25gph? Where did you get that number? Most outboards average 3-5gph at WOT

Not the big ones !!  My auto mechanic is a competition bass guy, his big 250 hp 4 stroke uses over 20 gal on at wot. Drop it back to 3/4 throttle and it cuts that in half, but at WOT, they suck fuel !!

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1 hour ago, airshot said:

Not the big ones !!  My auto mechanic is a competition bass guy, his big 250 hp 4 stroke uses over 20 gal on at wot. Drop it back to 3/4 throttle and it cuts that in half, but at WOT, they suck fuel !!

They don't have to be all that big by comparison my little 150sho burns 15gph @ wot which is mid 50s in my rig. Dial it back to 30mph and it's 3.5gph. Wot runs are never very efficient.

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1 hour ago, airshot said:

Not the big ones !!  My auto mechanic is a competition bass guy, his big 250 hp 4 stroke uses over 20 gal on at wot. Drop it back to 3/4 throttle and it cuts that in half, but at WOT, they suck fuel !!

The Yamaha Vmax might honestly be the worst fuel mileage of any common outboard. My uncle had a 225 that powered his 21 foot deep V walleye tournament skeeter years ago and that thing could haul ass, but man did it suck down fuel.

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1 hour ago, slonezp said:

25gph? Where did you get that number? Most outboards average 3-5gph at WOT

I searched Yamaha 250 four stroke WOT and that's what popped up. If it's on the internet it's truthfully factual, right?

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On 3/30/2024 at 2:10 PM, GreenPig said:

I searched Yamaha 250 four stroke WOT and that's what popped up. If it's on the internet it's truthfully factual, right?

I just looked up that same 250 up 4 stroke and mfgr claims 22-24 gph avg at WOT,  about avg with other brands.  At WOT a four stroke is only 10% more effiecient than a two stroke, but at lower rpm that fuel savings grows up to about 25-30% less consumption based off various mfgr charts

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