I started looking for vacuum leaks, all 3 gaskets for the carb - insulator - cylinder were bad and leaking. Slowly turn … I have a Green Machine blower, GB-50. At best, it will run at half throttle, but never at peak rpm. Note the position of the screw (this is the rich position). The machine will start and idle for 30 seconds or so, then die. If the engine on your blower runs then dies, you might need to check the tank vent, ignition coil, or gas cap. Lets simply try tuning the Hi screw carefully first. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. I replaced the 3 gaskets, sprayed off the carb with carb cleaner. Saw would start but needed some choke to run. Or I can rev it up, and it will also die after a short period. @Kingsford it would be nice if you would tell us if the the new ignition coil solved the problem. Saw runs like new for about 10 minutes +/ - a minute or two. I set the throttle to the cold setting and give it a pull, then switch it to warm and 1-2 pulls usually starts it, but it stops after a second or two. Hold the throttle wide open. Alright then. Slowly turn it out, while listening to the engine. I have a Stihl BG 55 leaf blower. It has a Zama C1M carb. I have a br600 with the same problem. All we need to do is replace the air filter. it starts right after again but it last less than a minute if is just idling will last longer. It starts right away and after a a few minutes of work it just shutdown. Happy day! Here's how: Start with your Hi screw at 1.5 turns out, as it runs there. To do this, start by opening the air filter cover. My Stihl MS 310 chainsaw dies a few seconds after I start it. Our repair guide can help you identify your problem and show you how to fix it with the right part. Run'er up to full throttle and adjust the Hi needle. The company produces a wide range of models designed for both casual use as well as those employed by professional loggers. Seems like a fuel supply problem. After dying, it will not immediately restart. Once it … Others report that their unit starts fine and then dies as soon as they give it throttle, leading to discussions on carb rebuilds, etc. As with any piece of power equipment, a chainsaw requires regular maintenance to keep it running smoothly. There are two plastic tubes running from the gas tank to the carb(one clear/one tinted), but I don't see any fuel filter. A dirty air filter is one of the most common causes behind a leaf blower that is bogging down: the air is enough for the engine to idle, but as soon as you switch to full-throttle, the machine will stall. I've read about other Stihl blowers having a similar problem, but not after 10 minutes of normal operation. 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