GCC
ArboristSite Lurker
I am working on a Stihl 015AV electronic chainsaw that sat for many years before it came to me. I knew that the carb was probably in need of a rebuild so I tore it down and did a cleaning and rebuild including the nozzle check valve. It is a Walbro HDC-17A. I adjusted the metering lever to even with the top of the body. After I put it back together I checked for spark which I had and tried to start the saw. It would not start and I noticed fuel dripping out of the bore. I let the saw sit and the next day the fuel tank was drained. I pulled the carb off and tried to test it with a hose on the fuel inlet while the carb was in water. There were no bubbles on the pump side, but bubbles were coming out of the bore. I stretched the lever spring to get a tighter seal on the needle valve. This stopped the leak until I put the metering cover back on. Now it leaked when I blew into the hose on the fuel inlet. I adjusted the metering lever down until the leak stopped. When I put gas in the tank the saw started and there were no leaks. It ran good and idled for about a minute until I shut it off. The next morning it would not start and I could smell gas. I pulled the carb again and the metering chamber was full of gas. I drained it out and put it back on the saw and it started right up and ran and idled good. The next morning again no start. I repeated the procedure to drain the metering chamber and again it would run. Next morning the same no start. Any ideas on what could be causing this?