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 Catalina/Capri 25/250 Sailor's Forums
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 Propane powered outboard		  New Topic  Topic Locked
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redeye
Master Marine Consultant

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3476 Posts
Initially Posted - 02/21/2012 :  14:05:32  Show Profile
http://www.boatingmag.com/blogs/miami-boat-show/propane-power

Strange Days....

Wow.. run to your destination, and reconnect for your grill....
Ray in Atlanta, Ga.
"Lee Key" '84 Catalina 25
Standard Rig / Fin Keel
Edited by - on

JimGo
Admiral

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USA
962 Posts
Response Posted - 02/21/2012 :  14:15:09  Show Profile
I wonder how far a tank will get you/long a tank will last.
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 02/21/2012 :  14:25:48  Show Profile
Depends... on how many hotdogs you cook between waypoints... :)

A whole new set of calculations...

5-hp outboard will run for 10 hours at full throttle on five gallons of propane
Edited by - redeye on 02/21/2012 14:29:07
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 02/21/2012 :  14:32:29  Show Profile
The 2.5 sounds kinda rough.. I think I'll wait for the version 3.5.. but hey.. what a concept.
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 02/21/2012 :  16:23:04  Show Profile
It won't fly unless they can keep the price relatively close to a gas engine, but it does sound interesting - one fuel for propulsion and cooking/heating!
Edited by - dmpilc on 02/21/2012 16:23:56
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Stinkpotter
Master Marine Consultant

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Djibouti
9080 Posts
Response Posted - 02/21/2012 :  17:24:22  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by redeye</i>
<br />5-hp outboard will run for 10 hours at full throttle on five gallons of propane<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">...which is a little more than they put in a 20 lb. L.P. tank.

My main concern over propane for this kind of purpose is the ~150 psi pressure (at about 80 degrees). Have you ever seen an uncontrolled discharge of propane? I have--it's like a jet engine, even when it's not burning.
Edited by - Stinkpotter on 02/21/2012 17:26:37
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 02/21/2012 :  17:32:06  Show Profile
For a car that's driven across town every day, propane would be killer. But for a motor that you use for 2 minutes, even paying $20/gal for gas isn't that bad.
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Joe Diver
Master Marine Consultant

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USA
1218 Posts
Response Posted - 02/21/2012 :  20:23:54  Show Profile
Yeah, for our little motors that sip gas, and as long as they're usually in use....there's just no sense in using something else. Nothing else is cost effective.
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 02/21/2012 :  22:38:56  Show Profile
Some of us already have LP tanks for the galley, so the fuel system is already there. It seems that this could also eliminate the ethanol issue.

I thought that many automotive motors could be retrofitted to LP. I wonder if it would be possible to do the same for existing 4-cycle gasoline outboards.
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JimGo
Admiral

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USA
962 Posts
Response Posted - 02/22/2012 :  06:40:54  Show Profile
That could be interesting, Rick. Not that it's high on my priority list, but do you have more info on the retrofit?
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 02/22/2012 :  07:17:26  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by dmpilc</i>
<br />It won't fly unless they can keep the price relatively close to a gas engine, but it does sound interesting - one fuel for propulsion and cooking/heating!
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
You're not thinking "green" enough.

What would be even more interesting is a flammable rum. One fuel for propulsion, cooking, heating, and most importantly, consumption!
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 02/22/2012 :  08:15:27  Show Profile
&lt;&lt; Flammable Rum &gt;&gt;

Convergence Technologies..

I's gotta look into that. (Hic)
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Dave5041
Former Mainsheet Editor

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USA
3758 Posts
Response Posted - 02/22/2012 :  10:42:11  Show Profile
All rum is flammable, especially 151. That would be about E-75.
Edited by - Dave5041 on 02/22/2012 10:43:09
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pastmember
Master Marine Consultant

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2402 Posts
Response Posted - 02/22/2012 :  13:12:32  Show Profile
Don't some generators run on propane, fork lifts, etc? Seems like a trivial adaptation to make.
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 02/22/2012 :  13:38:20  Show Profile
Many vehicles run on propane: city buses, gas co. trucks and some cars. At this time, however, they are concentrated in metropolitan areas to be close to refueling depots. I can currently refill my grill bottles for about $18. If propane becomes popular for transportation, I wonder how much more expensive that will become!
Edited by - dmpilc on 02/22/2012 13:38:56
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GaryB
Master Marine Consultant

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USA
4304 Posts
Response Posted - 02/22/2012 :  19:28:55  Show Profile
Yes to most all of the above types of vehicles/equipment that run on propane. Most are setup to run on both gasoline and propane.

There are some conversions that allow an engine to run on gas, propane, and natural gas (CNG).
Edited by - GaryB on 02/22/2012 19:30:20
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Joe Diver
Master Marine Consultant

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USA
1218 Posts
Response Posted - 02/23/2012 :  08:01:18  Show Profile
At Malibu Grand Prix (or whatever it's called now) those dragsters you ride in are propane powered.
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KenDavis
1st Mate

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USA
69 Posts
Response Posted - 02/23/2012 :  09:31:56  Show Profile
Honda and Yamaha generators have a dual fuel option to run propane too. I like the idea of one tank for multiple uses, but as someone pointed out the volume we use for our boats is so small that it may not be economical to change everything. gasoline is available everywhere, propane is slightly more pia.
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 02/23/2012 :  09:44:53  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by dmpilc</i>
<br />...I can currently refill my grill bottles for about $18. If propane becomes popular for transportation, I wonder how much more expensive that will become!
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I think it might actually come down with higher volume, since the fixed cost of the infrastructure would get spread over more sales.
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