So I spent some time today working on the 108. It started and ran fine. So I cut some grass, had to go out to the pasture to get some heavy grass to duplicate the conditions that caused the problem yesterday. After about half an hour it seemed to lose power again and smoking out of the breather again, so I opened the high speed jet to enrich the mixture and it regained power. So I think that might be the problem--running too lean, so when it's really hot, under heavy load it starts losing power. That seems to have solved the problem of power loss, but it's still smoking out the breather a lot.
The only way you get smoke out the breather is piston ring blowby, right?
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