Chainsaw problems - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 12-16-2013, 02:53 PM Thread Starter
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Chainsaw problems

I do not know much about chainsaws and I am now tasked with repairing one.

Back story: a pine tree fell over in my yard and a friend loaned me a Stihl 039 that was beat down. It ran well if you stayed on the throttle but needed a lot of work. I was able to de-limb the tree before the saw just stopped cutting. The air filter had holes in it, the chain is dull, and it leaked the bar oil out when it sat over night. I have since adjusted the oil screw, cleaned it up, installed a new air filter, sprayed out the carb. Next time I go into town (if I remember this time) I will pick up a file for sharpening the chain.

Now here is the problem. I pulled the spark plug and it looked new, so I reinstalled it. When I had it all put back together I tried to pull start it. Instead it hung up and I was not able to get a full pull out of it. I checked everything I could think of and nothing appeared to be wrong. So I pulled the spark plug and it turned over fine. Even with the plug removed it sounds like it has great compression. I have a lot of experience with two stroke ATV engines but no these small equipment engines. When I reinstalled the spark plus, the same problem again. That spark plug is the same one it was running on before. Why now would it prevent the engine from turning over?
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post #2 of 10 (permalink) Old 12-17-2013, 02:41 AM
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I'd guess decompression valve either faulty or didn't know it had one.

http://www.stihlusa.com/WebContent/C...ety_manual.pdf

Stihl are nice saws. Best saw I ever used was a Sachs.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


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post #3 of 10 (permalink) Old 12-17-2013, 02:42 AM
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Does this saw have a Decompression Lever? If so I would check that. :

Im a Husqvarna guy myself.

"Only accurate rifles are interesting" -Townsend Whelen

2012 Ram 2500 Crew Cab Big Horn
6.7L 68RFE 4wd
Yeah its stock.
Edge Insight CTS / Line-X / Access Bed Cover
B&W Turnover Ball / Companion Hitch
Pac Brake Air Bags
On Board Air
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post #4 of 10 (permalink) Old 12-17-2013, 02:43 AM
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It is locate between the handle and the brake on right side of the saw when holding it.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


Not a diesel mechanic in real life but I play one on the Internet
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post #5 of 10 (permalink) Old 12-17-2013, 02:44 AM
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Quote:
Originally Posted by neeltburn View Post
Does this saw have a Decompression Lever? If so I would check that. :
Manual indicates the 039 should have one.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


Not a diesel mechanic in real life but I play one on the Internet
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post #6 of 10 (permalink) Old 12-17-2013, 02:48 AM
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Quote:
Originally Posted by Weld engineer View Post
Manual indicates the 039 should have one.
Wes, I was thinking everything over 031 of 032 had one.. I may be wrong...

"Only accurate rifles are interesting" -Townsend Whelen

2012 Ram 2500 Crew Cab Big Horn
6.7L 68RFE 4wd
Yeah its stock.
Edge Insight CTS / Line-X / Access Bed Cover
B&W Turnover Ball / Companion Hitch
Pac Brake Air Bags
On Board Air
Optima Redtop 34Rs


2010 John Deere 2305
2010 Jeep Wrangler JK Unlimited Rubicon/ Tuned with some toys.
2016 Keystone Impact 311 Toyhauler






9-11-2001 NEVER FORGET
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post #7 of 10 (permalink) Old 12-17-2013, 02:59 AM
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Quote:
Originally Posted by neeltburn View Post
Wes, I was thinking everything over 031 of 032 had one.. I may be wrong...
I believe you are correct.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


Not a diesel mechanic in real life but I play one on the Internet
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post #8 of 10 (permalink) Old 12-17-2013, 12:56 PM Thread Starter
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That has to be the problem. I will dig and see if I can find it.
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post #9 of 10 (permalink) Old 12-21-2013, 05:19 AM
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Any updates?

"Only accurate rifles are interesting" -Townsend Whelen

2012 Ram 2500 Crew Cab Big Horn
6.7L 68RFE 4wd
Yeah its stock.
Edge Insight CTS / Line-X / Access Bed Cover
B&W Turnover Ball / Companion Hitch
Pac Brake Air Bags
On Board Air
Optima Redtop 34Rs


2010 John Deere 2305
2010 Jeep Wrangler JK Unlimited Rubicon/ Tuned with some toys.
2016 Keystone Impact 311 Toyhauler






9-11-2001 NEVER FORGET
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post #10 of 10 (permalink) Old 12-21-2013, 05:20 PM Thread Starter
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I took it to a chainsaw guru frined of mine. He found a problem with the magneto, but cannot explain why it is hard to turn over all of a sudden. He claims it will run fine once it is started.
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