Damaged muffler and cylinder

[Muddy42]

16 hours ago, spudulike said:

When you cleaned the transfer off, you didn't rub up and down the bore excessively in one area did you? This can cause a very shallow cavity that can knock off compression. It is better to get rid of most of it with chemical and rubbing around the bore.

Try running it, if the compression is borderline, you will have issues starting it when it is hot. 

 

Yes, you may be right, there was a really bad gouged section near the exhaust port that I focussed on. I didn't rub up and down, only round the bore, but I could have caused a similar effect. I was using a fine scotch-brite pad attached to some 30mm dowel in a drill.

 

Let's see.

 

[openspaceman]

A bit late now but if you place a new ring in the bore and square it up by pushing the piston against it you can measure the ring gap in several places to check bore wear.

 

You could probably judge how bad a gouge is by seeing how much light passes by the ring with a dental mirror.

[Muddy42]

6 hours ago, openspaceman said:

A bit late now but if you place a new ring in the bore and square it up by pushing the piston against it you can measure the ring gap in several places to check bore wear.

 

You could probably judge how bad a gouge is by seeing how much light passes by the ring with a dental mirror.

that’s a great idea that I’ll remember for next time! Im learning the whole time.

[Muddy42]

It works! and restarts after 5 mins of cutting! Thanks for the help everyone.