Chainsaw exhaust leaking

[echoechoecho]

Exhaust is leaking from between the cylinder and muffler on my Echo 501. I've taken off the muffler to inspect and both mating surfaces are clean. The original gasket seems to be in good condition.

 

Will high temperature silicone gasket sealer on the original work, or buy/make a new gasket?

 

 

 

 

[Darkslider]

If mating faces are flat and clean (check both with a straight edge, make sure you can't see any light between the two) and gasket is in good condition (you're not meant to re-use gaskets really but 99% of people do) gently try the mounting bolts in the holes to make sure they're not bottoming out before the exhaust is being clamped sufficiently tight. I had this on an old concrete saw that had been in bits, screws had got mixed up and the screws holding the exhaust on were a few mm too long so held the muffler on just about but weren't clamping it to the cylinder at all. 

[Stubby]

2 hours ago, Darkslider said:

If mating faces are flat and clean (check both with a straight edge, make sure you can't see any light between the two) and gasket is in good condition (you're not meant to re-use gaskets really but 99% of people do) gently try the mounting bolts in the holes to make sure they're not bottoming out before the exhaust is being clamped sufficiently tight. I had this on an old concrete saw that had been in bits, screws had got mixed up and the screws holding the exhaust on were a few mm too long so held the muffler on just about but weren't clamping it to the cylinder at all. 

This was my thought .

[echoechoecho]

If mating faces are flat and clean (check both with a straight edge, make sure you can't see any light between the two) and gasket is in good condition (you're not meant to re-use gaskets really but 99% of people do) gently try the mounting bolts in the holes to make sure they're not bottoming out before the exhaust is being clamped sufficiently tight. I had this on an old concrete saw that had been in bits, screws had got mixed up and the screws holding the exhaust on were a few mm too long so held the muffler on just about but weren't clamping it to the cylinder at all. 

Thanks, I'll take a look in the morning.

[echoechoecho]

Update.

There was a little bit of swarf at the bottom of one the holes, probably picked up from my bench when I initially removed the muffler.

While it's off I'm going to replace the gasket as its indented.

Anyone know of a cheap supplier of exhaust gasket sheets? I imagine it'll be less expensive to cut out my own than buy a ready-made gasket.