Spark arrestor screen theory

[Wood Doctor]

This puppy will kill a Stihl leaf blower faster than anything ever invented, usually in less than a year:

Note that it's clean in this Pic.

 

[Maintenance Chief]

I've seen alot of posts about the screen preventing things from getting in the muffler, but I thought the original design was for fire prevention?

 

[Mastermind]

I've seen alot of posts about the screen preventing things from getting in the muffler, but I thought the original design was for fire prevention?

That's true.

 

[kneedeepinsaws]

This puppy will kill a Stihl leaf blower faster than anything ever invented, usually in less than a year:
View attachment 299285
Note that it's clean in this Pic.

Yes those are terrible but I think the screen is not the problem, it is the 1/2” X 1/4” reduction in the hole!!!

 

[Wood Doctor]

Yes those are terrible but I think the screen is not the problem, it is the 1/2” X 1/4” reduction in the hole!!!

Correct. Both are the problem. I even tried blowing compressed air through one that was clogged and nothing went through it. Some Stihl line trimmers also have major spark screen clogging problems.