Hey all,
I was "fortunate" to find a Stihl 192TC at a garage sale for $20 recently. Catch was the carb was bad, but the fellow selling it threw in an additional carb (C1Q-S135) and a few other misc parts from another 192TC he had gutted for free. I figured "why not?" For $20 seemed like it might be a fun project/learning experience if nothing else. Fast-forward, I cleaned the "good" carb, replaced its gaskets/diaphragms, put in a new spark plug and reassembled. The good news? The saw runs, sort of. It starts, will idle, but is pretty grumpy about revving up, at least when cold. If I fully depress the throttle, the saw will bog down, but I can get it to rev up if I feather the throttle a few times. Once it revs, it's slow to hit full RPMs and doesn't have a lot of power (will easily bog down again when cutting). Once you let off the throttle, it will also die about 50% of the time. Another 'odd' behavior, the saw will also bog if I point the nose down, but it revs up no problem if I tilt the bar upwards to the sky.
Interestingly, if I keep the throttle high for a good minute or two and let the saw warm up more, these issues more or less go away. I was able to do a few test cuts without much power loss and the tilting power loss issues also seemed to mysteriously vanish. I Initially set the carb to the factory defaults (3/4" H, 1 full for L) but I've noodled with them a little to no avail. Is this carb also toast or is there something else I'm missing here? Any feedback/suggestions are greatly appreciated.
Side-note, I found an OEM Zama C1Q-S257 carburetor on Ebay for $30, but I'm unable to find any authentic Zama C1Q-S258's (which is what Stihl's technical documents say to use). Do any carb-heads out there know if an S257 will work in lieu of an S258? They both seem about the same as the S257 is used on the 192T. I'm just not super familiar with the carb specifications, so again, any help there would be much appreciated!
I was "fortunate" to find a Stihl 192TC at a garage sale for $20 recently. Catch was the carb was bad, but the fellow selling it threw in an additional carb (C1Q-S135) and a few other misc parts from another 192TC he had gutted for free. I figured "why not?" For $20 seemed like it might be a fun project/learning experience if nothing else. Fast-forward, I cleaned the "good" carb, replaced its gaskets/diaphragms, put in a new spark plug and reassembled. The good news? The saw runs, sort of. It starts, will idle, but is pretty grumpy about revving up, at least when cold. If I fully depress the throttle, the saw will bog down, but I can get it to rev up if I feather the throttle a few times. Once it revs, it's slow to hit full RPMs and doesn't have a lot of power (will easily bog down again when cutting). Once you let off the throttle, it will also die about 50% of the time. Another 'odd' behavior, the saw will also bog if I point the nose down, but it revs up no problem if I tilt the bar upwards to the sky.
Interestingly, if I keep the throttle high for a good minute or two and let the saw warm up more, these issues more or less go away. I was able to do a few test cuts without much power loss and the tilting power loss issues also seemed to mysteriously vanish. I Initially set the carb to the factory defaults (3/4" H, 1 full for L) but I've noodled with them a little to no avail. Is this carb also toast or is there something else I'm missing here? Any feedback/suggestions are greatly appreciated.
Side-note, I found an OEM Zama C1Q-S257 carburetor on Ebay for $30, but I'm unable to find any authentic Zama C1Q-S258's (which is what Stihl's technical documents say to use). Do any carb-heads out there know if an S257 will work in lieu of an S258? They both seem about the same as the S257 is used on the 192T. I'm just not super familiar with the carb specifications, so again, any help there would be much appreciated!