Nutball
Here For The Long Haul!
- Local time
- 5:40 PM
- User ID
- 7732
- Joined
- Oct 31, 2018
- Messages
- 4,042
- Reaction score
- 11,037
- Location
- Mt. Juliet, TN
I'm not in to working on these 4xx series saws, or chasing down strange problems anyway. I'm not going to rebuild the carb. I was told this saw worked well recently, but suddenly had the issue.
It starts and idles, stalls occasionally. It will fast idle a little faster than idle, but not much more and it sounds rich when fast idling. I was able to tune it to run on full throttle (I turned it .5 turn rich). The engine responds to tuning, but not by much. I can close the needles, and open them too much.
Full throttle runs slightly slower than it does barely above idle (where it is fastest, but barely moves the chain). I'm assuming some glitch in the ignition is limiting its max rpm to idle. The faster it goes, the more strokes the ignition misses causing the rough 4 stroking sound.
That's my assumption, what's yours? I'm ok with trying a $12 ignition, but otherwise it's going on ebay.
It starts and idles, stalls occasionally. It will fast idle a little faster than idle, but not much more and it sounds rich when fast idling. I was able to tune it to run on full throttle (I turned it .5 turn rich). The engine responds to tuning, but not by much. I can close the needles, and open them too much.
Full throttle runs slightly slower than it does barely above idle (where it is fastest, but barely moves the chain). I'm assuming some glitch in the ignition is limiting its max rpm to idle. The faster it goes, the more strokes the ignition misses causing the rough 4 stroking sound.
That's my assumption, what's yours? I'm ok with trying a $12 ignition, but otherwise it's going on ebay.