Ketchup
Epoxy member
- Local time
- 6:08 AM
- User ID
- 5594
- Joined
- Mar 12, 2018
- Messages
- 2,210
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- Location
- Colorado

I live in western colorado and regularly cut in the 8,000' - 10,000' range. I don't own any A/T or M/T saws but I always assumed that they would have enough adjustment range to tune at these elevations. Does this apply to stock saws only? Have you run modified A/T M/T saws at high elevations?
I have quite a bit. I find them more unreliable than at lower elevations though they will run. The most recent versions of MT/AT seem better but they still struggle to lean out. It’s worse in smaller saws like 201tc, 550mk2, even 362c. Timing advance and raising the piston windows (and transfer uppers) helps a bit.
Regardless of carb type, at elevation make sure you tune/calibrate the carb and clean the spark arrestor often. Watch for carbon buildup. Bring extra saws. The higher you go, the more problems you will have.