SteveSr
Well-Known OPE Member
- Local time
- 11:48 AM
- User ID
- 2294
- Joined
- Dec 14, 2016
- Messages
- 132
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- Location
- North Carolina
2-Stroke Gurus,
I am having issues with a Stihl FS120 (4134 series) 30cc brushcutter. It acts like an intermittent sticking main nozzle check valve. Sometimes won't idle or stall at idle. Sometimes won't rev up. Tried a couple of different carburetors but all from the same source so may have multiple bad carburetors. These carbs are marked as Stihl C1Q-s161 but are NOT from a Stihl dealer. I am begining to think that they came out of the Zama scrap bin in China!
The other issue is that the compression on this unit is about 10-15% less than a couple of other similar units that appear to function. Now, these units don't seem to have a lot of compression to begin with so I am wondering if all or part of the issue with this one is the somewhat lower compression. It does seem to start easy which I wouldn't have thought if it was too low compression.
So the next question is if the compression is deemed too low should I just re-ring it or also replace the piston?
Thanks,
Steve
I am having issues with a Stihl FS120 (4134 series) 30cc brushcutter. It acts like an intermittent sticking main nozzle check valve. Sometimes won't idle or stall at idle. Sometimes won't rev up. Tried a couple of different carburetors but all from the same source so may have multiple bad carburetors. These carbs are marked as Stihl C1Q-s161 but are NOT from a Stihl dealer. I am begining to think that they came out of the Zama scrap bin in China!
The other issue is that the compression on this unit is about 10-15% less than a couple of other similar units that appear to function. Now, these units don't seem to have a lot of compression to begin with so I am wondering if all or part of the issue with this one is the somewhat lower compression. It does seem to start easy which I wouldn't have thought if it was too low compression.
So the next question is if the compression is deemed too low should I just re-ring it or also replace the piston?
Thanks,
Steve