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Chainsaw exhaust leaking


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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. 

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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 .

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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.
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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.

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