Inter674
ArboristSite Lurker
Cant Find the Problem
so I pulled it all apart - checked the carby again, the piston and bore is fine, the muffler is not blocked, petrol feeds okay, but still it wont rev up.
I noticed that it stalls as soon as the air head butterfly opens. It will run and rev a bit on part choke and if you completely block the main carby inlet port, it will rev up when the second air head port opens. Thinking this proved a petrol supply problem, I pulled the carby again, but again no problem could be seen with all venturis etc clear.
I think therefore that the electronic device atop the carby and which replaces the high and low needles is the problem, and blocking the main carby port simply overrides it and forces fuel into the engine somehow - like the choke does I guess. You can get the same effect if you spray fuel into the engine
Has anyone had any experience with the (presumed) AT device atop the carby in this regard?
Secondly has anyone got a part number for the conventional carby for this saw?
Thanks
so I pulled it all apart - checked the carby again, the piston and bore is fine, the muffler is not blocked, petrol feeds okay, but still it wont rev up.
I noticed that it stalls as soon as the air head butterfly opens. It will run and rev a bit on part choke and if you completely block the main carby inlet port, it will rev up when the second air head port opens. Thinking this proved a petrol supply problem, I pulled the carby again, but again no problem could be seen with all venturis etc clear.
I think therefore that the electronic device atop the carby and which replaces the high and low needles is the problem, and blocking the main carby port simply overrides it and forces fuel into the engine somehow - like the choke does I guess. You can get the same effect if you spray fuel into the engine
Has anyone had any experience with the (presumed) AT device atop the carby in this regard?
Secondly has anyone got a part number for the conventional carby for this saw?
Thanks