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Author Topic:   Fuel economy of 250 Carbed outboards

mustang7nh posted 08-21-2003 10:02 AM ET (US)
I'm looking at a Classic OR22 with 1999 Johnson 250 Carb engine. I know the theory of high power works less hard at cruise and hence can make up in economy. But would the 250 carb be a total hog or comparable to a 225 DI on a light boat like the 22? Thanks for your comments. I'd like to get 2.5 mpg at 35 mph.
Bigshot posted 08-21-2003 10:46 AM ET (US)
Fuel economy out of a 250 carbed....hahahahahaha!
Yopu "might" get 2-2.5 at 4,0000 rpms. The Yamaha 250's burn close 18gph at 4k. The DI or 4 stroke would get closer to 4+mpg.
Sal DiMercurio posted 08-21-2003 11:29 AM ET (US)
Gotta agree with Bigshot, theres no such thing as economy with 6 jugs sucking fuel.
I think BS is being very very generous at 2 - 2-1/2 mpg.
Anything over 3,500 rpms is gonna be more like 1 - 1-1/2 mpg compared to a DFI engine at 4 - 5-1/2 mpg.
What you would like to get & what is reality are quite aways apart.
Sorry but all those 200 & up carbed engines are gas hogs.
Sal
Bigshot posted 08-21-2003 01:04 PM ET (US)
I was thinking 18gph at 36mph= 2mpg. My 225 carbed gets about 2.6 at cruise 37-3800rpm(32mph at 12gph). At WOT about 2gph(50+mph at 24gph). The 250 Yammie burns about 30gph at WOT, gas pigs for 25hp. I do NOT know about the V6 OMC 250. The 250 V8 would be a financial disaster.
BIGSTICK posted 03-09-2006 12:24 AM ET (US)
I know this is an old post. I did a search on 22' mpg and found this thread. Thgought it was funny when BS said it would be a financial disaster with a 250 V-8. Yes it is!!!!! I have a 97 V-8 Johnson and get around 1 whoppin MPG on average. Hence the reason for the search. Looking to see what the other 22's are getting with what power. Looks like I could easily double what I'm getting now. Hard to say what bothers me the most. The range I get at 1mpg or the cost just to get there. Hard to justify a new motor when there's nothing wrong with the one I have now. $15k can buy a lot of gas.
nytugcapt posted 03-10-2006 12:26 PM ET (US)
I replaced the original 1982 Johnson 235 on my 22' Revenge with a 2006 Evinrude e-tec 200HO. I do not have a flow scan so I don't know the exact mileage, but for the same trips that I was doing I now use 1/4 the gas. The "Two Thirsty Five" was a notorious pig. It changes your whole outlook on using the boat. Before I repowered I would use the Revenge about 25% of the time and my 28' diesel Downeaster about 75% of the time. Since the repower I have hardly used the diesel boat and am considering selling it. The fuel mileage alone is probably not worth 15 grand, but the performance,quietness and range along with the trust to go on much longer trips make the repower well worth it. Believe it or not you will get used to not smellimg the smoke.

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Author	Topic: Fuel economy of 250 Carbed outboards
mustang7nh	posted 08-21-2003 10:02 AM ET (US) I'm looking at a Classic OR22 with 1999 Johnson 250 Carb engine. I know the theory of high power works less hard at cruise and hence can make up in economy. But would the 250 carb be a total hog or comparable to a 225 DI on a light boat like the 22? Thanks for your comments. I'd like to get 2.5 mpg at 35 mph.
Bigshot	posted 08-21-2003 10:46 AM ET (US) Fuel economy out of a 250 carbed....hahahahahaha! Yopu "might" get 2-2.5 at 4,0000 rpms. The Yamaha 250's burn close 18gph at 4k. The DI or 4 stroke would get closer to 4+mpg.
Sal DiMercurio	posted 08-21-2003 11:29 AM ET (US) Gotta agree with Bigshot, theres no such thing as economy with 6 jugs sucking fuel. I think BS is being very very generous at 2 - 2-1/2 mpg. Anything over 3,500 rpms is gonna be more like 1 - 1-1/2 mpg compared to a DFI engine at 4 - 5-1/2 mpg. What you would like to get & what is reality are quite aways apart. Sorry but all those 200 & up carbed engines are gas hogs. Sal
Bigshot	posted 08-21-2003 01:04 PM ET (US) I was thinking 18gph at 36mph= 2mpg. My 225 carbed gets about 2.6 at cruise 37-3800rpm(32mph at 12gph). At WOT about 2gph(50+mph at 24gph). The 250 Yammie burns about 30gph at WOT, gas pigs for 25hp. I do NOT know about the V6 OMC 250. The 250 V8 would be a financial disaster.
BIGSTICK	posted 03-09-2006 12:24 AM ET (US) I know this is an old post. I did a search on 22' mpg and found this thread. Thgought it was funny when BS said it would be a financial disaster with a 250 V-8. Yes it is!!!!! I have a 97 V-8 Johnson and get around 1 whoppin MPG on average. Hence the reason for the search. Looking to see what the other 22's are getting with what power. Looks like I could easily double what I'm getting now. Hard to say what bothers me the most. The range I get at 1mpg or the cost just to get there. Hard to justify a new motor when there's nothing wrong with the one I have now. $15k can buy a lot of gas.
nytugcapt	posted 03-10-2006 12:26 PM ET (US) I replaced the original 1982 Johnson 235 on my 22' Revenge with a 2006 Evinrude e-tec 200HO. I do not have a flow scan so I don't know the exact mileage, but for the same trips that I was doing I now use 1/4 the gas. The "Two Thirsty Five" was a notorious pig. It changes your whole outlook on using the boat. Before I repowered I would use the Revenge about 25% of the time and my 28' diesel Downeaster about 75% of the time. Since the repower I have hardly used the diesel boat and am considering selling it. The fuel mileage alone is probably not worth 15 grand, but the performance,quietness and range along with the trust to go on much longer trips make the repower well worth it. Believe it or not you will get used to not smellimg the smoke.