propane power....

Mercury Outboard  general discussion

propane power....

Postby creekrunner » Sun Feb 03, 2019 8:06 pm

Experience is a wonderful thing...........it enables you to recognize a mistake when you make it again.....
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Re: propane power....

Postby Yellowjacket » Sun Feb 03, 2019 8:40 pm

An awful lot of sail boats have propane aboard for cooking and they use the outboard motor very infrequently, just for docking and getting out the marina.....  This gets rid of the issues with fuel gumming up in the system due to infrequent use.  Since it's a 4 stroke there's no issues with oiling....  Probably a good solution.  Still, propane is a dangerous fuel on any boat since it is heavier than air...   I wouldn't want it on a sailboat, but that's just me..
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Re: propane power....

Postby Fingerlakeskid » Sun Feb 03, 2019 9:29 pm

Gasoline vapors are heavier than air as well. What 's the difference?
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Re: propane power....

Postby outboard315 » Sun Feb 03, 2019 11:03 pm

Lol they look exactly like the Lehr outboards that have been out for for a few years now.

The biggest thing is propane produces less harmful chemicals when burned than gas. So it's more environmentally friendly.
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Re: propane power....

Postby Yellowjacket » Sun Feb 03, 2019 11:04 pm

The difference is that the propane is under pressure and is a vapor already...  Those are two big differences.  While gasoline will evaporate eventually, you have a chance to clean it up if it spills.  Propane sits in the bottom of the hull already vaporized...  While gas is bad propane is worse in that regard.  The second aspect of the gas being under pressure is the worst though.  If you have a leak in a hose, you might spill a small amount of gasoline, but if you have a hose leak with propane your tank empties...  Lots more btu's of explosive vapor gets out faster...    May not matter if you're subject to either explosion, (you can only be so dead).  Some folks prefer the propane because the tanks are more robust,,,  lots of pluses and minuses...  None of the options are very good...   Most people who use gas grills on boats have the grill hanging over the side so if there are any fumes they don't go down into the hull...
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Re: propane power....

Postby chuckw » Sun Feb 03, 2019 11:23 pm

no thanks to propane motors. Too risky. icon_thumbdown.gif
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Re: propane power....

Postby outboard-rob » Mon Feb 04, 2019 3:02 am

Call me old fashioned or whatever but 4 stroke outboards,propane outboards and anything electric just isn’t an outboard to me. An outboard to me should burn gasoline, and it should burn it every time the piston comes to tdc. Glad to be in my 50’s because Hopefully I won’t have to witness electric or propane outboards become mainstream. Four stroke outboards were disappointing enough.
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Re: propane power....

Postby bh/ » Mon Feb 04, 2019 5:59 pm

-a big advantage to LPG is  its  octane rating , as high as 108. An engine with its spark curves and CR optimized for LPG will produce more power, and a direct mixing valve replaces the carburetor. Ford produced a car in the '80s for commercial use that had more power and fuel economy than its equivalent gasoline model .
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