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200Tom1 
Orange Level
Joined: 03 Jun 2019
Location: Iowa
Points: 1232
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 Topic: Chain Saw
Posted: 27 Apr 2022 at 12:50am |
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Guys FYI. I bought an 80 volt chain saw from Menard's a while back. It worked good until you put the bar into any type of bind. Then the dang chain would fly off. Chain was tight. I took the bar and chain to our local chain saw guru. I ask him to sell me a new bar and chain. He looked at the bar and measured the depth of the groove, lay'd a straight edge on it and told me there wasn't anything wrong with the bar. He them picked up the chain and studied it. He told me the chain was bent. I'd never heard of that. He must a been right, I bought a new Origin chain, we put it together and proceeded to cut a short box pickup load of wood. It never flew off once.
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dee_veloper
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Joined: 12 Apr 2021
Location: USA
Points: 1168
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Posted: 27 Apr 2022 at 2:29am |
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I've never heard of a bent chain either. I always use Oregon chains and bars.
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Don't confuse my personality with my attitude.
My personality is who I am. My attitude depends on who you are.
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DMiller
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Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 33850
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Posted: 27 Apr 2022 at 5:29am |
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Chain guides can get bent, will flip off in a heartbeat once get that way, junks the chain.
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Amos
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Joined: 11 Sep 2009
Location: Ontario
Points: 1318
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Posted: 27 Apr 2022 at 5:40am |
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I just straighten the chain when I bend one. Usually it is on drive like that gets bent. pair of pliers will straighten them, The chain a new saw comes with is usually the poorest quality chain you can buy.
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Hubert (Ga)engine7
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Joined: 12 Sep 2009
Location: Jackson Cnty,GA
Points: 6464
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Posted: 27 Apr 2022 at 8:19am |
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Thanks for the info, Tom. I have had a few to come off like that, not real pretty if the chain is not in a cut and moving fast when it decides to jump the track.
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Just an old country boy saved by the grace of God.
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allischalmerguy
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Joined: 11 Sep 2009
Location: Deep River, IA
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Posted: 27 Apr 2022 at 8:53pm |
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I have bent a chain before. And I use oregon chains.
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It is great being a disciple of Jesus! 1950 WD, 1957 D17...retired in Iowa,
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200Tom1
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Joined: 03 Jun 2019
Location: Iowa
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Posted: 28 Apr 2022 at 11:13pm |
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The chain said Origin on it, so did the bar. But the saw is made in China so who knows what it actually was. Got to use the saw quite a bit, New Origon chain seem to have solved the crisis.
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JC-WI
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Joined: 11 Sep 2009
Location: wisconsin
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Posted: 29 Apr 2022 at 8:24am |
Talking of chainsaws, I left a saw in the back of a pickup some 6 or 7 years ago and forgot about it because I had bent the handle on it and broke the side bracket. Couple days ago I seen it inside the topper and wondered if it still had gas in it and it did, and didn't smell bad. Tank was 3/4 full. Despite the upper handle was off, I gave it 5 pulls and it was running. Found another handle and started using it. dang, I sure like that old Jonsered 52E... Despite the chain is worn out and will be getting a new chain soon on it.
Bet an electric saw wouldn't have started up after sitting that many years... and still be quieter than mine if it did run.  But then it wouldn't be running on Av gas either. Think I better switch back to that stuff again, because it didn't form any crud in the tank in all that time either.
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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
Points: 12150
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Posted: 29 Apr 2022 at 10:01am |
 JC-WI wrote:
Talking of chainsaws, I left a saw in the back of a pickup some 6 or 7 years ago and forgot about it because I had bent the handle on it and broke the side bracket. Couple days ago I seen it inside the topper and wondered if it still had gas in it and it did, and didn't smell bad. Tank was 3/4 full. Despite the upper handle was off, I gave it 5 pulls and it was running. Found another handle and started using it. dang, I sure like that old Jonsered 52E... Despite the chain is worn out and will be getting a new chain soon on it.
Bet an electric saw wouldn't have started up after sitting that many years... and still be quieter than mine if it did run. But then it wouldn't be running on Av gas either. Think I better switch back to that stuff again, because it didn't form any crud in the tank in all that time either. |
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Clay
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Joined: 11 Sep 2009
Location: Udall, Kansas
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Posted: 29 Apr 2022 at 1:10pm |
[/QUOTE]
I have the same problem with my Stihl.
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Tbone95
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Location: Michigan
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Posted: 29 Apr 2022 at 2:12pm |
Yah, and heaven forbid it's cold out. I mean, after all, who cuts firewood when it's cold?
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Alberta Phil
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Joined: 13 Sep 2009
Location: Alberta, Canada
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Posted: 29 Apr 2022 at 8:31pm |
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My old Stihl is 30 years old and usually starts in 3 or 4 pulls, unless it's been sitting for months, then takes a few more, but always starts.
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DaveKamp
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Joined: 12 Apr 2010
Location: LeClaire, Ia
Points: 6066
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Posted: 29 Apr 2022 at 11:10pm |
So... when it takes several pulls, the USUAL situation, is that the fuel pump diaphragm (the largest neoprene part in the bottom of the carb) is starting to get stiff from age, and exposure to fuel-type stuff. Ethanol will get to 'em pretty fast, but even good gasoline/oil mix will eventually wind up with bad actors in it, as a result of chemical action between it, and the various materials the fuel has been in contact with.
On newer saws, the other issue is mixture screw settings... The 'emmissions' aspect of design protocol force manufacturers to put 'limiting caps' on mixture adjustments (or in some cases, eliminate adjustment altogether), and one of the issues, particuarly semi-hot starts, is that the fuel mixture is too 'lean' to fire until you've pulled the cord a bunch.
The other things that will, if the saw is well-aged, is
- crankcase seals... specifically, around the crank, and the crankcase halves. The crankcase is responsible for generating the vacuum to draw fuel/air mix in from the carb, and PUSH the fuel/air mix into the combustion chamber. An air leak in the crankcase totally foils that.
- plugged exhaust screen. The muffler has a fine wire mesh screen whose function is to catch sooty embers and hold them to prevent starting a forest fire. Unfortunately the screen eventually becomes plugged up, and won't flow exhaust. An engine that cannot flow exhaust, will not take in air/fuel mix to fire... hence, they don't start well... and frequently get weak on power. Pull the muffler cover, yank that screen, and see if it'll start well without it... if it does, clean the screen.
If a chain gets jammed and bent, the drive/guide tabs inside the bar groove won't line up, and it WILL throw the chain. Bending 'em back is a temp fix, and if done well, will oftentimes last 'till the chain teeth can't be sharpened anymore.... but realize that a maligned drive tab will frequently bind as it passes through the bar (the 'good tabs' will all be in line, and the bad one will still be slightly offset), so it'll wear out the bar quickly, and overheat it, and the bent point, rather fast.
Throwing on a new chain solves much anguish.
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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
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Posted: 30 Apr 2022 at 6:22am |
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Well Dave, that is all very well and good. One thing I have decided I do not have time to do is putz with the chainsaw. I barely have time to cut the wood, work my job, feed 50 some animals and repair farm equipment. Since I drive by the dealer every day, dropping the saw off on Monday to be ready for the coming weekend seems a reasonable compromise. Only reason I say that, is, well, you’d think the dealer would know that too!
Which brings me to my hunch/ assumption that you mentioned about mixture and emissions. From the standpoint of a Stihl dealer, there IS nothing wrong with it. Oh well.
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