Once again I have managed to make a simple job (dirty carburetor, I checked what I had dumped out of the fuel tank and it was just oil) into several days of entertainment. The after market carby arrived ahead of time, installed it and the saw would not start, removed it and replaced the fuel lines and purge bulb. Managed to get the saw started but same problem as before, it would not idle. I suspected it was sucking air at the intake manifold as the new gasket supplied was the wrong one and the old gasket was in very poor condition. Removed it and rechecked everything that Tyler mentioned earlier where I may have an air leak. No idea what the hole is for in the bottom of the intake manifold below the throat but removed the plastic ring and pondered it for awhile. See pic. Reassembled same problem. In desperation I removed the low idle jet sprayed a little cleaner around and reassembled to approximately the same position. Saw would not start at all. Turned the low speed jet in quarter of a turn and it started. Did a static tune (may not be the correct term but by ear with the motor running) and jet was nearly 1/2 turn from where it was when it arrived. Foolishly put the bar and chain back on and tested it. Not enough power to cut a toe nail. Did a tune on the high speed jet finding it was more than half a turn away from original as well. Saw runs and cuts but a little hard to start. A common problem when ever I attempt a static tune. I guess the purpose of this forum is to learn something, and I figure if I remove that carby one more time there is a 50 50 chance that I will connect the accelerator cable before screwing it down. I have used generic carburettors 3 times in the past with perfect results, but for the benefit of future users it may not be wise to assume they are not just plug and play. Tyler, thanks for your help on this, there would not be anything wrong with the old carby that a competent clean and reassembly wouldn't fix, maybe a diaphragm, I see that you are local, if you want it for a spare just send me a personal message with your address and I will stick it in the car and drop it in sometime when I am in your area.
If I can get a large enough hammer it will run for awhile just trying to get away from me
