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| | #1 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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Does it exist....many might have ask this question? other's would think it is impossible!!!!!!!!!!!!! The answer is ...YESSSS!!!!!!!!!!!!!!!!!!!! My latest acquisition...very rare in America.....COMET COMO "B" . Diesel chainsaw do exist and i am the proud owner of one. The russian did not invent anything but like the chinese copying the russian druzzba chainsaw and selling them as new, i was in china last fall and have seen it...we are going into a world of buyer beware!!!!! they even make true copies of huskvarna and jonsered chainsaw. Coming back to the diesel stuff, Although a very light and innovative saw, sales were not what the inventor Mr. Wiig had hoped for, so, he took his idea to neighboring Sweden. A company called Como... M. T. Bjerke would now build the Comet in Sweden. This occurred in 1950. The Swedish version of the Comet was called model B.Production of Comet is approximately 1,000 between 1950 through 1953. Verry light saw, 32oz would make her run for 1 1/2 hr....It is a 2 cycle engine that uses an injector type of carburetion system with a glow plug called a tandror working out from propane gaz under pressure inside the handle assembly. Comet was pruchased by Jonsered and did produced another model...the RACKET XA injector saw. Technology was too advanced for those days and even if those saws could run on diesel fuel, kerosene or gasoline mixed with oil, the production was limited and ceased in 1960. Hope this was of some interest....... My collection: vintagechainsawcollection.blogspot.com Alain, |
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| | #2 |
| Moderator Join Date: Feb 2007 Location: Climbing around the world
Posts: 855
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Thanks for sharing Caporal. Very interesting, besides the fact that if they did market it, I'd have to start bloody carrying an extra container of Diesel :P It is very hard to imagine someone like Stihl, making something as compact as a 200T, a diesel engine. Although I could imagine something like an 880 or a 3120 as a diesel...
__________________ We are what we repeatedly do... Excellence then, is not an act, but HABIT... Red : Green : Blue |
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| | #3 |
| Part of the Furniture Join Date: Jun 2007 Location: orlando,fl
Posts: 4,977
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Thanks for sharing,do you think its safe to use around power?
__________________ Have your say join us today.![]() old schooler |
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| | #4 |
| Custom Chainsaw Muffler Modifications Join Date: Dec 2007 Location: Ohio
Posts: 107
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I cant remember where I read it but any saw will run on Diesel if you get it hot first and you adjust the squish properly. Scott. |
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| | #5 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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This is an interresting question?????????????????????? ![]() I would like to see that being a miracle..................a nice theory but impossible to my knowledge since diesel engine takes in just air, compresses it and then injects fuel into the compressed air. The heat of the compressed air lights the fuel spontaneously. A gasoline engine compresses at a ratio of 8:1 to 12:1, while a diesel engine compresses at a ratio of 14:1 to as high as 25:1. ![]() it is not feasable with the engineering design of the chainsaw. I have seen some diesel engines that would run on gas for startup....with a decomp valve and then when hot enough ...would turn to diesel operation but never the opposite(CR is too low). on standard chainsaw...better have a strong rod..... ![]() Alain, /www.csgnetwork.com/compcalc.html |
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| | #6 |
| Mature tree Join Date: Nov 2007 Location: Troms, North Norway
Posts: 283
| Here is the story of the Diesel Chain Saws, written by no less than George Blake. Since he wrote that, there has been documented that some Comet "A"s were made in Sweden, and some Comet "B"s in Norway - but most of the parts probably were made by Jonsereds anyway...... |
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| | #7 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: iowa--usa
Posts: 125
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caporal---and how did you find out about, and purchase, this rare gem????
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| | #8 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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| | #9 |
| Former Member Join Date: Oct 2007 Location: Bakersfield, Ca
Posts: 2,512
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is that a fancy way of saying "a garage sale"?? ![]() Incidentally, I was over at a guy's place this evening returning his socket set. (a WW2 set that runs up to 4") He's also a tractor mechanic and he's been helping my friend and I as we've been rebuilding the hydraulic swivel motor on the excavator. Anyhow... we got to talking about saws and he showed me his old Stihl 041, and as I was ogling it with my eyes, he brought out his 1940's homelite... that thing weighed a ton!!! What a bitchin saw though. I'll have to ask him about the diesel saw thing. |
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| | #10 | |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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Let me know what you find...i know for a fact that my saw was produced in the number of 1,000...........how many are left in this world...who knows>>>>>>??????????????? ![]() Alain, Quote:
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| | #11 |
| Moderator - Previously known as JayD Join Date: Feb 2007 Location: TreeWorld, Sydney Australia
Posts: 2,029
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__________________ Member: Australian Tree Association Join the Australian Tree Association...Have your voice heard ! Arboriculture, A life long study for some, a passing phase for others © Jeffrey J Darby 2011 Last edited by JohN Dee; 21st May 2008 at 10:15 AM. Reason: Dads bloody account again |
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| | #12 |
| Moderator Join Date: Feb 2007 Location: Climbing around the world
Posts: 855
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Hey Cap, how do you go when your saw runs out of diesel? Do you have to prime it up like a mofo for it to start again?
__________________ We are what we repeatedly do... Excellence then, is not an act, but HABIT... Red : Green : Blue |
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| | #13 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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Diesel is combustible when mixed wit hot air....since the engine is already hot the air mixture with the diesel at he injector permits to spin the flywhell by hand and it should start the engine ...but i have never tried it... ...OR SIMPLY USE THE CRANK......Alain, Last edited by CAPORAL30; 21st May 2008 at 10:38 AM. Reason: typo |
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| | #14 |
| Sappling Join Date: Jun 2008 Location: New York, USA
Posts: 25
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Jonsered produced two variants of the diesel chainsaw, one used a small propane heater and another used a battery powered glow plug arrangement.
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| | #15 | |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
| Quote:
Alain, | |
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| | #16 |
| Sappling Join Date: Jun 2008 Location: New York, USA
Posts: 25
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Hi Alain, I did not intend to say Jonsered was first, I was simply replying to the question of how the combustion air is heated on a cold saw and referred to Jonsered`s two methods. |
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| | #17 |
| Semi-mature vigorous tree Join Date: Dec 2007 Location: CANADA
Posts: 52
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jokers....you are right... |
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| | #18 | |
| Mature tree Join Date: Nov 2007 Location: Troms, North Norway
Posts: 283
| Quote:
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| | #19 | |
| Semi-mature vigorous tree Join Date: Jun 2008 Location: canada
Posts: 93
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dare i say, but maybe there was more diesel, but all 4 that blew up were stihls and not one husky had a problem. not proven but would make sense. | |
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| | #20 |
| I'm new here so be nice Join Date: Feb 2011 Location: urbana
Posts: 1
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Well funny thing that is true,Because i am a Student at Ohio Hi-Point Career Center and i am in Professional Turf&Landscaping.My Friends say that there are no such thing as a diesel chainsaw.But thanks to the editor I proved them very wrong. |
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