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-   -   fuel economy of twin 454's??? (https://www.offshoreonly.com/forums/general-q/275307-fuel-economy-twin-454s.html)

endeavour32 04-28-2012 06:42 AM


Originally Posted by dereknkathy (Post 3674527)
single engine boat doesn't burn any fuel at all!!

Even singles burn fuel. Last summer I took my friends old Four Winns tri-hull to lake michigan from my dock. That trip is 3 miles. Within that trip I burned 4.5 gallons of fuel there and back. My Formula would have burned 9 gallons. The difference is Four Winns is 15 feet with a 100 hp 2 stroke Johnson, the Formula 30 feet with 660 hp. I would happily to burn the little bit of extra fuel to be in my Formula. Now, I just bought a 19 foot Sea Ray with a 4.3 liter in it, for general communiting on my lake. That will get around 3 mpg. Thats about as good as its going to get in a boat.

Point is, if you want to only spend $100 or less per weekend and actually boat, a 19 foot or so runabout is your only option. For me to run my Formula to Lake Michigan, kill the engine have a beer and watch the sunset and drive home will cost me $40.00! And that's cruising at 3500 rpms with 4 blade props. So as you can see $100 is not going to get you far at all!

dereknkathy 04-28-2012 07:08 AM

i meant, once one motor is broke, the single burns NO fuel. (while sea tow or a samaritan pulls you home) the twin boat gets home, but burns LOTS and goes slow.

endeavour32 04-28-2012 07:24 AM

Lol, but sea tow is not cheap! A 1 mile tow cost me $160. I'd rather burn a gallon of fuel for $4.50!

Fordtough150 04-28-2012 08:39 AM


Originally Posted by endeavour32 (Post 3674558)
Lol, but sea tow is not cheap! A 1 mile tow cost me $160. I'd rather burn a gallon of fuel for $4.50!

Wow! Sea tow isn't cheap! lol

JWoolever 04-28-2012 08:43 AM

I am seeing 1.6 to 1.7 mpg cruising with twins, each year I take a cruise that is 130 miles round trip I fill up each time I go out, and I used 75 to 80 gallons and that includes idle time, this is without WOT runs mainly cruise speed 45 to 55.

dereknkathy 04-30-2012 05:29 AM


Originally Posted by dereknkathy (Post 3674554)
i meant, once one motor is broke, the single burns NO fuel. (while sea tow or a samaritan pulls you home) the twin boat gets home, but burns LOTS and goes slow.

lemme try this again. when you break one engine with a single you are-literally-up the creek without a paddle. if you have twins, you still get home WITHOUT paying seatow. and you notice i said WHEN not IF you break an engine. the price of a little extra fuel, and double maint is worth that little detail...

endeavour32 04-30-2012 07:37 AM


Originally Posted by dereknkathy (Post 3675632)
lemme try this again. when you break one engine with a single you are-literally-up the creek without a paddle. if you have twins, you still get home WITHOUT paying seatow. and you notice i said WHEN not IF you break an engine. the price of a little extra fuel, and double maint is worth that little detail...

No, that is NOT what you said! You said a twin engine boat burns a lot of fuel while a single being towed burns none! Seriously, I why do you come on here post silly, unrelated posts and then get all defensive and attempt cover your tracks. You had similar unrelated comments in a head post and you tried to jump all over Raylar. Stick to the question and make your comments what you actually mean not some coded message. Again the question here is what is the fuel burn for twin engine 454's?

Now to your comment that you WILL break an engine. Not true, I've been boating daily since I was 10 years old, I have thousands and thousands of hours on the water. In that time I've needed to be towed in three times. Two becuase I ran out of gas and one becuase I had water in the fuel. A normal boater can boat thier entire life and never toast an engine or drive.

MILD THUNDER 04-30-2012 08:03 AM


Originally Posted by ckcgobigblue (Post 3674385)
Thanks guys I'm looking at a 27 fever with a 540 vs a 29 with twin 454's just wondering what you thought. And fuel wise I can't afford to spend 150 a wknd, 50-100 sounds a lot better. Thanks

50 Bucks a weekend in gas???? Dude, and you were looking at a boat with a Supercharged big block with a pair of dual 750 carbs?

50 Dollars is lucky to get you 12 gallons of gas. I cant run my car on 50 dollars a weekend, let alone my boat.

Sometimes people just kinda dont understand this hobby. For example, my father, who is not a car guy, nor a boat guy. I showed him some pictures of my buddy's new engines he build for his boat. A pair of 1200HP 588's with 8.0L whipples and a dual 1050 carbs. My fathers first response was, "how much gas is that thing gonna burn?"

Point is, most guys you see running around with big blower engines, big drives, etc, aren't that concerned with economy. And I don't think its because they are filthy rich, its because they kinda just know it's a expense that comes along with that kind of boating, and budget for it.

I myself, by no means have fat pockets, but running around with a pair of 310HP MPI engines just doesnt get my blood pumping. Therefore I have some engines with big blowers. Granted my doller wont go nearly as far as the guy with a pair of 310HP 454's. So my boating journeys are not sightseeing along the coasts, and traveling from port to port. It's more of, "Hey, you wanna go for a blast?? Then sit at the beach and get a tan??" And I'm content with that. But thats me, and why I own a 1990 boat with custom blower engines, and not a newer boat with stock MPI engines.

If your not realistic about your expectations from owning a go-fast boat, you're just setting yourself up for dissapointment and failure. There's alot more expense to owning these things than just buying the boat and putting gas in it.

4bus 04-30-2012 08:40 AM


Originally Posted by MILD THUNDER (Post 3675693)
50 Bucks a weekend in gas???? Dude, and you were looking at a boat with a Supercharged big block with a pair of dual 750 carbs?

50 Dollars is lucky to get you 12 gallons of gas. I cant run my car on 50 dollars a weekend, let alone my boat.

Sometimes people just kinda dont understand this hobby. For example, my father, who is not a car guy, nor a boat guy. I showed him some pictures of my buddy's new engines he build for his boat. A pair of 1200HP 588's with 8.0L whipples and a dual 1050 carbs. My fathers first response was, "how much gas is that thing gonna burn?"

Point is, most guys you see running around with big blower engines, big drives, etc, aren't that concerned with economy. And I don't think its because they are filthy rich, its because they kinda just know it's a expense that comes along with that kind of boating, and budget for it.

I myself, by no means have fat pockets, but running around with a pair of 310HP MPI engines just doesnt get my blood pumping. Therefore I have some engines with big blowers. Granted my doller wont go nearly as far as the guy with a pair of 310HP 454's. So my boating journeys are not sightseeing along the coasts, and traveling from port to port. It's more of, "Hey, you wanna go for a blast?? Then sit at the beach and get a tan??" And I'm content with that. But thats me, and why I own a 1990 boat with custom blower engines, and not a newer boat with stock MPI engines.

If your not realistic about your expectations from owning a go-fast boat, you're just setting yourself up for dissapointment and failure. There's alot more expense to owning these things than just buying the boat and putting gas in it.

Well said

I think you also realized that going from 1.3mpg to .7 mpg is no big deal if it puts a giant smile on your face.

Fuel effiecient boat is an oxymoron, even the ones that do good only do good because they are compared to other boats, so it is relative. Compare it to a car and it is horrible!

mike tkach 04-30-2012 08:40 AM


Originally Posted by dereknkathy (Post 3674527)
the one place where a single engine really shines mpg-wise, is when you break one engine. twin boat gets REALLY bad mileage on one engine. single engine boat doesn't burn any fuel at all!!

for the life of me,i don,t understand why you post these useless post,s,most of your posts are :bsflag:you don,t offer any factuial information,but i do get a laugh out of your post,s.if u dont know what u are talking about,maybe u should just:7160:but id bet that won,t happen.


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