Gazza,
Have you had the head off the cylinder as it could also have a carbon build up if you are getting sparks coming from the exhaust port.
Yes you could have carbon build up in the muffler as well as the exhaust port.
Hi Bruce, had a couple of heavy days so haven't got back to it yet. I had a quick play with the muffler and did manage to get a bit of muck dropping out so will hold off buying until I check it out properly on the weekend. I was in the process of pulling the head off when I logged on and you performed your magic so I didn't finish taking it off.
If a good clean and decoke of the reachable areas doesn't do it, I will drop the head off and do that and the valves too. Might even do what Grumpy suggested so I can get some practice with my new TIG.
I can relate to what you say about wasps because I had a Ryobi edger that wouldn't start and eventually found that it had a wasp nest in the muffler. Didn't even consider it with this one though.
Again, Many thanks and hope you enjoy a beer or 3 with a bit of the donation.
Gazza
