Over time, the spark arrestor can become clogged with soot. Shortblock 33 7.1 Muffler / spark arresting screen 33 7.2 Leak testing 34 … truth of running 24 5.4 Test sequence 25 5.5 Ribbed poly V-belt 26 5.6 Tensioner 27 5.7 Starter cup 28 6. If you’ve checked all the possible problems and corrected them and your chainsaw still won’t stay running – it might be time to bring it to the service center for a carburetor check-up. decided to work through the options,starting with easiest first. i have a few year old stihl kombi km90r. Clutch 30 6.1 Belt pulley / clutch drum 31 6.2 Studs for securing the cast arm with guard 32 7. it then went to running hit or miss. Common solutions for: Stihl Leaf blower starts then dies. still,gave it a clean,put it back in and the saw started 3rd pull and ran like a champ,no dying or bogging down,cut down a couple of smaller trees and limbed them,no problems. I guess they discontinued those saws, which is a shame because they where great saws, so now we use the TS420's. checked all the connectio … read more Hi Guys, I have a Stihl 031 AV chain saw that suddenly won't stay running. It looked perfect. TS 420 STIHL Cutquik® A 14” cutting wheel puts this cut-off machine in the big leagues of performance, efficiency and ease of use. Removed the spark screen,a little dirty,but not too bad. Fastest way to fix your unit if it doesn't rev up. at first it was a pain to start, flood easily, etc... i have always ran 93 pump gas mixed with stihl oil. hello all, just finished putting a new jug and piston on a TS 420 cut off saw. started up quick enough but won't even come close to keeping an idle. I put a new tank of freshly mixed gas (40:1), a new plug and cleaned the air filter, which really didn't need it. now it will not start. Related Posts: ... STIHL MS 192 T vs. Husqvarna T435 gasoline chainsaws – competition of power and size; seems to be running lean. This pattern continues to repeat itself even after the saw is well warmed up. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. We have used Stihl products since we opened in 1991. I thought it was the carb so I pulled it off and cleaned it and blew it out with compressed air. If the spark arrestor is clogged, the engine may stall. NOT just Leaf Blowers! i took the carb off and one of the fuel lines was very brittle and broke, i replaced the 2 lines coming in and out of the carb to the tank, not the in tank line or the line going to the crank case. Re-chocking (once until it kicks) gets it running again for another 20-30 seconds. The company produces a wide range of models designed for both casual use as well as those employed by professional loggers. 01 - Spark Arrestor. For a little background info we are a commercial concrete, brick and granite paver installer in the MD, VA, and DC area. The saw was running fine. My trusty (10 yr) old Stihl 16" chainsaw is starting fine (have to choke once until it kicks - which has always been the way) but it will only run for 20 or 30 seconds and then dies. To unclog the spark arrestor, remove it and clean it with a wire brush. Andreas Stihl & Co. is a well-known manufacturer of chainsaws. thanks for the advice fellas. The spark arrestor is a small screen that prevents the engine from emitting sparks. When i started we used the TS400 cut saws. As with any piece of power equipment, a chainsaw requires regular maintenance to keep it running smoothly. Applies to all trimmers, blowers, hedge trimmers and some chainsaws. stihl ts420 cut off saw - Answered by a verified Technician We use cookies to give you the best possible experience on our website.