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Old 09-21-2014, 03:55 PM
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Greetings!

Does anybody have experince with a chainsaw that runs off standard portable propane bottles? Seems like the best combo for carrying in a vehicle where normal 2-cycle gas would be impractical and 110V electrical would be impossible. Over the next few years, such a chainsaw would be very handy here in CO, where millions of beetle trees will begin falling over our mountain roads.

Thanks!
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Old 09-21-2014, 03:58 PM
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Don't think I'd want to accidentally cut through the gas line....
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Old 09-21-2014, 04:03 PM
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I've seen propane injected saws but nothing purely run on propane. Seems like you'd need a 4 stroke as you wouldn't be able to lube the cylinders of a 2 stroke.

why is a 2 stroke impractical for you?
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Old 09-21-2014, 05:56 PM
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Auto parts stores carry cans of premixed 2 stroke gas that would be good in a those situations. Wrap some tin foil around it to keep the temperature down and you're good to go.
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Old 09-21-2014, 06:05 PM
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I don't understand why the gas powered would be impractical. Carrying a bar-b-que size propane bottle is worse than a 5 gal gas can of pre-mix, and the gas line would need to be long, or you can strap the propane bottle to your back...
Until TSHTF and gasoline disappears, I see absolutely no advantage to a propane setup.
And a boatload of disadvantages. IMHO.
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Old 09-21-2014, 06:37 PM
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There is no propane powered chainsaw on the market that I've ever heard of.

There are several riding lawn mower models and LEHR makes a string trimmer and a leaf blower that run on those small green propane bottles, but nothing like you are asking about. You would have to DIY it and you would need to replace the 2 stroke engine when you did it.

Looking at the web, the idea has been mentioned a few times but only like you are doing, namely asking if they exist and wishing some company would make them, but the conversations peter out pretty quit without a resolution.

Unless you are a good small engine mechanic good at modifying engines then you are probably out of luck.
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Old 09-21-2014, 11:24 PM
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Thanks for the input. My thinking was that a 4-stroke chain saw using the small 16.4 oz propane bottles could be stored in a vehicle indefinetly without concern for gasoline degredation, or caborator gum up after use- just unthread the bottle and put the saw back in your truck box. Spare fuel cylinders would be easy to store and transport. This saw would NOT be for sustained usage.
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Old 09-21-2014, 11:59 PM
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Message LEHR and see if they have any plans to make one. They seem to be the only outfit looking to make propane powered yard tools. If any company has plans to make one in the future it would likely be them.
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Old 09-22-2014, 08:44 AM
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Two stroke chainsaws really do "rule" as the power to weight is very important. 3.2HP and 9 pounds is a good place to be (a typical 50cc saw)

4 stroke engines of the same size make about 1.1-1.3HP. And the engine alone weighs 11Pounds.

Don't discount a quality electric saw, with an inverter hooked to your car/truck's battery.

Also, there are fuels that won't go bad. 100LL, Avgas is one of them. VP-Fuels "C-9" 96 octane is another, Sunoco also has a 96 octane "storage fuel" that is available in 5 gallon pails, from the race shop. Really, none of the above fuels will go bad if stored properly. No additives needed.
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Old 09-22-2014, 09:07 AM
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Husqvarna used to make a propane chainsaw . A company in Norway used to make a diesel chainsaw which is what I wish someone would make again.
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Old 09-23-2014, 08:44 AM
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Supposedly this stuff is good for 5 years unopened and 2 years once opened. While it's yet another fuel source to transport, the containers are small and well-suited for a chainsaw.

http://www.homedepot.com/p/TRUSOUTH-...cAow&gclsrc=ds
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Old 10-03-2014, 06:14 PM
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Thanks for the inputs folks!

Some good information to review.
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Old 10-03-2014, 07:13 PM
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I carry a chainsaw in my toolbox for the occasions where I find a tree down on the road to the BOL. (about twice a year).

I keep the same ol' gas in it.
Maybe change it once / year.
I use Stabil.
No problems at all.
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Old 10-04-2014, 08:52 PM
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Quote:
Originally Posted by LloydChristmas View Post
Supposedly this stuff is good for 5 years unopened and 2 years once opened. While it's yet another fuel source to transport, the containers are small and well-suited for a chainsaw.

http://www.homedepot.com/p/TRUSOUTH-...cAow&gclsrc=ds
and my guess would be that this is a conservative estimate.

oxidation is what kills a lot of things and it if sealed you minimize that be a lot.

you would be better off just getting some of the premix in sealed containers and then rotating it every 5 years than converting a chainsaw to propane.

weight and size per amount of work done would be an advantage that goes to the gasoline over the propane.
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