Knobby57
Peeing outdoors
Sent from my iPhone using Tapatalk
Stihl MS 291 burnt out after 1 hr
- Thread starter west041
- Start date
Help Support Arborist Forum:
Sent from my iPhone using Tapatalk
I'm not "complaining" about the responses. I was trying to contain my mind blowing from trying to listen to people ask me if I had a sharp chain or put the chain on backwards or overrevved while the chain brake was engaged. Maybe you'll know how it feels if you ask a question somewhere and have people question whether you have the most basic common sense principles.
I established at the beginning that I have more than enough cutting experience to know what I'm doing.
I established at the beginning that I have more than enough cutting experience to know what I'm doing.
Knobby57
Peeing outdoors
I find this flowchart applies to most everything [emoji15]
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Knobby57
Peeing outdoors
tree monkey
Addicted to ArboristSite
my name and address is not hard to find on this site. let me know if your unable to find it. I would be happy to assist you if need be
Knobby57
Peeing outdoors
You will probably receive literature on how to sign up for overpriced healthcare that supplements coverage for those lazy people that don't work, Or the ones that smoked crack for 10 years and live in the ER...... But hey !! If you like your doctor you can keep him.... It's just not covered
Sent from my iPhone using Tapatalk
I didn't find it. Please post it so I can come to your house.
tree monkey
Addicted to ArboristSite
I see your from maine
Sounds like that would work out well... treemonkey can sell you a new stihl.
Be honest Scott, you're really west041, and you're just playing with us, and yourself.
Wait, that didn't cum out right.
Wait, that didn't cum out right.
.png "Love :heart:")
tree monkey
Addicted to ArboristSite
<<<<<hint
<<<<<<<<<<<<<
<<<<<<<<<<<<<
tree monkey
Addicted to ArboristSite
so you still don't know where I live?
When i read this thread title i thought it was gonna be stihl MS 291 burnt out after H1 R and it was a typo..and turn into an oil thread..looks like you boys have it covered.
No one is blatantly trolling you... everyone states their own opinion on the possible cause for this mishap.
The culprit is HEAT, and that heat must have developed somewhere.
You used the chainsaw only 1 hour you say, and we assume it was in operable condition from the operator's viewpoint (chain oil delivery OK, chain sharp, chain brake not engaged).
This leaves only friction of some sort around the clutch assembly where the damage occurred. Looking at the pic it seems that most of the heat was emitted from the clutch shoe circumference as there are burn marks on the inside of the drum circle. If the brake band had been rubbing against the drum there would be burn marks mostly on the outside of the drum circumference. Thus, it can be assumed that the heat developed inside the drum. If the heat had developed from around the crank shaft the worm gear would have melted.
For me it looks like the clutch had been slipping for a while - it does not take long for metal to glow red from friction... Heat dissipation from an inboard clutch is very ineffective, so it may have been just a few seconds that did the damage.
I can think of only 3 possible causes:
1: Chain brake was engaged by accident in the cut and the operator tried to get the chain going thinking it was caught in the log
2: Saw was not operated at WOT when cutting thicker logs
3: The chain was jammed/not sliding smoothly in the bar causing the clutch to slip
I can't think of any other possible cause... maybe someone else can.
The culprit is HEAT, and that heat must have developed somewhere.
You used the chainsaw only 1 hour you say, and we assume it was in operable condition from the operator's viewpoint (chain oil delivery OK, chain sharp, chain brake not engaged).
This leaves only friction of some sort around the clutch assembly where the damage occurred. Looking at the pic it seems that most of the heat was emitted from the clutch shoe circumference as there are burn marks on the inside of the drum circle. If the brake band had been rubbing against the drum there would be burn marks mostly on the outside of the drum circumference. Thus, it can be assumed that the heat developed inside the drum. If the heat had developed from around the crank shaft the worm gear would have melted.
For me it looks like the clutch had been slipping for a while - it does not take long for metal to glow red from friction... Heat dissipation from an inboard clutch is very ineffective, so it may have been just a few seconds that did the damage.
I can think of only 3 possible causes:
1: Chain brake was engaged by accident in the cut and the operator tried to get the chain going thinking it was caught in the log
2: Saw was not operated at WOT when cutting thicker logs
3: The chain was jammed/not sliding smoothly in the bar causing the clutch to slip
I can't think of any other possible cause... maybe someone else can.
