Honestly how many ponies do you prefer on a 25'

starcrafttom":1vwp78j4 said:
1 gph x my average of 350 hours a year x 4 bucks a gallon=1400 bucks..
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One gallon per hour?? Where's the REAL Tom?? Since when do you run the boat at displacement speed? When I see you out on the water, you are generally flying. One gallon per hour... you crack me up! :twisted:
 
No you goof. Some one stated above that the difference between the two motors was Just a gallon an hour. Well just a gallon a hour is 1400 a year. Thats almost three more 100 gallon tanks for me , so three more weekend.
 
I looked at the graphs and it shows a max difference in fuel flow of about 1 gph. These are peaks that occur at fairly narrow speed ranges. Unless you spend a lot of time around these particular speeds, the difference in fuel consumption is very small. In one case the bigger engine burns more fuel, in the other it is the smaller engine.
 
So perhaps what I had read (here) earlier is basically not a bad guideline (within the reasonable size range for a given boat). Essentially that it takes X amount of energy to push X boat through the water at X speed so whether you are doing it using 80% of a 100hp engine or 50% of a 160hp engine (just to pick numbers out of a hat), the "mileage" is about the same for fuel consumption. That kind of makes sense, physics-wise (at least to my brain).

That still leaves personal preference, and typical running habits as variables when choosing an engine brand and size (plus thing such as alternator size, etc.); but perhaps "mileage" is not so much of a factor between reasonable engine sizes.
 
starcrafttom":3ehmxa9s said:
No you goof. Some one stated above that the difference between the two motors was Just a gallon an hour. Well just a gallon a hour is 1400 a year. Thats almost three more 100 gallon tanks for me , so three more weekend.
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That makes more sense. The only time I've seen you run at displacement speed is when you are within 30 feet of the dock. :mrgreen:
 
The only time I've seen you run at displacement speed is when you are within 30 feet of the dock.
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Same here. Tom passed us once outside of Everett...I tole M it appeared he had only one speed....FAST. :lol: :wink:
 
localboy":29sbatod said:
The only time I've seen you run at displacement speed is when you are within 30 feet of the dock.
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Same here. Tom passed us once outside of Everett...I tole M it appeared he had only one speed....FAST. :lol: :wink:
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Now, Mark, Tom has TWO speeds: floored and 1 mph. I would think it could have saved some money to just put a switch in instead of a throttle. :mrgreen:
 
I like speed and love big engines but not in a 26'
C-Dory.
My twin 90's do just fine and top out at mid 30's mph
which I rarely do.
Having gone over 2X this speed often in another 30' boat,
of entirely different design, I can tell you I would not like to go
even 45 mph in my 26' C-Dory. Without having done it, I am
certain it would behave "squirrely" do to its flatish bottom opposed
to a deep "V".
As for fuel consumption, a C-Dory isn't a boat that you'll be going
"that far" to worry about it. If you go "that far", you're in the wrong
boat. Ball park 250 - 300 miles on a fuel load should do for most.*

*Safe fuel consumption dictates 1/3 tank getting there, 1/3 tank to
get back, 1/3 tank for emergency use.

Aye.
 
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