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Old 02-06-2021, 16:54   #1
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6Hp Propane Range

If you own a propane outboard. What is the range?
How long have you run on a camp stove bottle?
A 10 lb bottle?
A 20lb Bottle?


Thanks
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Old 02-06-2021, 18:06   #2
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Re: 6Hp Propane Range

I read the title and thought- "wow, that will boil water in a hurry!"
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Old 02-06-2021, 18:08   #3
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Re: 6Hp Propane Range

Quote:
Originally Posted by Panope View Post
I read the title and thought- "wow, that will boil water in a hurry!"
Boil? No.

Beat? Certainly.
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Old 05-06-2021, 11:39   #4
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Re: 6Hp Propane Range

Are you not aware that if you beat water hard enough it boils? All a matter of the energy transferred.

I hope that you will find an answer to this question and share it. I have one propane genset, but if is supplied by a much larger bottle, and I manage one genset that runs off 10 lb bottles. Even a rough estimate would help.

OK. Here's a way to get to an estimate. The energy contained in a pound of propane (or LPG) and in a pound of gasoline are about the same. Under standard conditions a gallon of propane weighs about 4.2 pounds while a gallon of gasoline is about 5.7 pounds. That's a 27% difference, and low and behold, propane is 27% less efficient per gallon. So, expect to get the mileage from 5.7 pounds of propane that you would get from one gallon of gasoline. Now go get an empirical figure and see if it matches.
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Old 05-06-2021, 11:50   #5
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Re: 6Hp Propane Range

I sold Lehr outboards before I retired.
The 2.5 hp would run about an hour on one pound of propane. The 5hp would run about half an hour on 1 pound of propane.
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Old 16-06-2021, 03:52   #6
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Re: 6Hp Propane Range

While participating in the Texas 200, I motored out to the ICW channel sailed until my rudder broke. Motored to the land cut, fixed the rudder. Experienced light winds in wrong direction, motored to Haps Cut. Fixed the rudder again. Next day, started motoring, tried tacking into contrary winds. We reverted to motoring after running aground. We ran on the motor the rest of day.

I believe we went 80 miles at 3/4 throttle on a 15lb bottle. We averaged 4 knots. I have a brand new mercury propane 5hp motor.
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