It seems like vibrating loose muffler bolts was a problem with that model. The guy that posted that photo says that he had some retrofit done at his Husky dealer that was supposed to solve the problem, but it kept loosening up and eventually melted the housing down into the oil tank. Looks pretty serious.
Wonder what it is that keeps the bolts loosening up on that model, I mean to a greater degree than is normal on saws? Is the muffler particularly heavy? If there is space, you could maybe stick some star washers under the bolt heads to help keep them from turning.
Cool Jack! Jay not sure but it is a issue with them for sure. First bolts loosened and the local husqvarna saw shop tech said take the gasket out it lasted like that for a year or more without loctite.
FWIW a stripped 5MM hole is the right size to zip a 6MM spiral point tap through .One option could be using a serrated belleville type washer to help keep it tight .
Loctite that is good up to 600F. New to me. Does the cylinder get hotter than that? Locking a stud into the cylinder would be a good fix. Double nutting is an easy and fairly good method.
On aluminum cylinder heads on modern automobiles they use stainless steel studs that have a coating of a type of sealant on them .The nuts used have a captive type belleville type washer which allows it to move with temperature variations but still keeps tension on the fastener .
200T Stihls that use an aluminum muffler are noted for having problems rattling the muffler loose .I think more times than not people screw the bolt back in but forget to use the serrated belleville washer that's supposed to be in there .A lock washer really won't do you much good in a situation like that .
I know it sounds completely asinine but when those bolt heads rust up a bit and bond to the muffler itself, they stay put. I know of some retired loggers that used to let their saws ride in the back of their trucks for a few weeks when they bought them new. They swore a little rust in certain places held the saw together better then anything.
Every sportster I have put back together has sat in the rain for that reason before any real riding. That said this saw spent many days in the back of my truck to no avail.
I did get helicoil for it and will wire tie it also.
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