First of, sorry for the long post.
I have this Stihl FS120 for a while (like 7 years) and I have a KM94r too, coming here because i'm out of ideas on how to fix my weed eater.
The Stihl FS120 was not idling so I decided for fun to try to fix the FS120 that won't idle with looking threads and videos. Usually, was able to fix a few things that way (like a microwave, a dishwasher, 2 mowers). Now, the FS120, tt really doesn't want to idle. As soon as I release the throttle, it dies. If you run it full throttle, no problem, it can run all day long BUT, full throttle (or 3/4) only... Of course, tried the low speed screw to enrich and get it leaner, tried the idle screw and also checked the spark arrestor, checked without the muffler, without the air filter, another spark plug, tried to re-align the ignition system, THAN began changing parts!
What has been changed for new...
1st: All fuel line (tank to carb, primer to carb, primer to tank) including fuel filter and the two grommets
2nd: Carburator
3rd: Than... Ordered a kit with air filter, spark plug, the ignition system, also a new gas cap, new gaskets and decided to change everything...
4th: Cylinder and piston and while there, changed the bearings.
I was "cheap" on the cylinder and piston because they looked ok so ordered one from China instead of OEM...
So, what's remaining in this weed wacker that hasn't been changed... The muffler (it's very clean, no spark arrestor in it), the clutch, the flywheel, the shaft itselfs...
So i'm here to get some idea what could be wrong OR what to test!!! It didn't costed a lot to have all those parts and I have a KM94r that makes the job but would still like to get the FS120 to run
I have this Stihl FS120 for a while (like 7 years) and I have a KM94r too, coming here because i'm out of ideas on how to fix my weed eater.
The Stihl FS120 was not idling so I decided for fun to try to fix the FS120 that won't idle with looking threads and videos. Usually, was able to fix a few things that way (like a microwave, a dishwasher, 2 mowers). Now, the FS120, tt really doesn't want to idle. As soon as I release the throttle, it dies. If you run it full throttle, no problem, it can run all day long BUT, full throttle (or 3/4) only... Of course, tried the low speed screw to enrich and get it leaner, tried the idle screw and also checked the spark arrestor, checked without the muffler, without the air filter, another spark plug, tried to re-align the ignition system, THAN began changing parts!
What has been changed for new...
1st: All fuel line (tank to carb, primer to carb, primer to tank) including fuel filter and the two grommets
2nd: Carburator
3rd: Than... Ordered a kit with air filter, spark plug, the ignition system, also a new gas cap, new gaskets and decided to change everything...
4th: Cylinder and piston and while there, changed the bearings.
I was "cheap" on the cylinder and piston because they looked ok so ordered one from China instead of OEM...
So, what's remaining in this weed wacker that hasn't been changed... The muffler (it's very clean, no spark arrestor in it), the clutch, the flywheel, the shaft itselfs...
So i'm here to get some idea what could be wrong OR what to test!!! It didn't costed a lot to have all those parts and I have a KM94r that makes the job but would still like to get the FS120 to run