Automender
Active OPE Member
Working on a TS420 Stihl cutoff saw and came across an issue in the carb. On a K970 Husky I did the same test and the pop off pressure was about 15 psi. On this Stihl carb I did the same and I pumped it up to 25 psi and it didn't pop the needle valve. The needle valve is not stuck since I can press the metering lever and it pops. Is this normal. Also what is the sealant they use on the oblong welch plug in the picture?