Silverstone Lawnboy engine cycles up and down. Still cutting OK but it is annoying and probably headed for the shop. Googling suggested adjusting nut on carburetor but I can't find one. It's been in the shop before (about a month before end of last season). Mower is 5 years old and used ~2 hr/week in cutting season. I do all the suggested maintenance but they tell you nothing about inner workings. When tuned, the damned thing uses gas like crazy but when it settles down, gas usage goes way down which makes me think there is some simple bottleneck/adjustment to carburetor. Any suggestions would be welcome. Frank
- posted
18 years ago