How are you at diagnosing chainsaws that won't start.
A friend gave me one that he couldn't get started. I thought , no problem, this shouldn't be to hard to fix.
I seem to have spark,( visable when spark plug grounded to head, and get some very short engine firings.) (Makes me think it is fuel problem). I have installed new spark plug, carb kit, and fuel line. Carb looked clean inside. Saw was stored with gas tank empty. I have tried many adjustments of the high (h) carb adjustment screw, to no real effect. I don't really know if I have too much or too little fuel. Plug does seem to get wet during choking, but not excessively so. I usually blow off plug and blow out plug hole between trys. I have tried using starting fluid thru carb with inconsistent results, sometimes I get a couple fires then nothing, other times nothing (Makes me wonder if it really is an ignition problem).. I have kind of run out of ideas. The only remaining thing that I can think of is to replace the so called impulse line from the engine to the carb. This is supposed to be a vacuum line which is necessary for carb to get fuel. Unfortunately it is really difficult to get to. I guess the other choices are spark intensity (a function of ignition coil), and perhaps ignition timing (which is also difficult to mess with).
Any ideas on how to really isolate problem to fuel vs ignition, if fuel then what?
