So I have a Craftsman 3.3 (Poulan 3300) chainsaw that I recently picked up. I have no history on the saw but it allegedly ran fine last winter. The issue I am having is that it will start up just fine when it's cold, but after about five minutes it stalls out and won't start back up, I sometimes get a little putter, or it will even run for a second or two, but it usually just pulls and gives me nothing. It usually takes almost a day before it will run again.
Fuel is properly mixed at 40:1, carb is clean and it is getting fuel. there is no pressure building up in the gas tank, so I don't think I have vapor-lock. There is a consistent, blue, spark. The plug is new and gapped to 0.025", and the coil air gap is 0.012". Air filter and spark arrestor are both clean and clear. I fpulled the flywheel and the key is not sheared, and the magnet is still strong. Compression for the motor is 130psi, and I inspected the cylinder to find the original crosshatching still present, no major scoring.
I have no excessive smoke and the spark plug is never wet, so I don't believe it is flooding, but I tried following the directions for starting a flooded engine anyways, still to no avail. A few nights ago I decided to spray a bit of carb cleaner throught the intake of the carb (I know, Its bad for the engine) but I got one little put from that and that was it, I tried a second time and got absolutely nothing. Which makes me thing it is more ignition related. The spark looks fine outside, but I have no idea how good it is when under compression.
I disassembled and cleaned out the carb, and set the idle and mixture screws to 1 1/4 turns out, which is what the service manual said to use for a fresh rebuild before initial tuning, but I can't get it to run long enough to make any adjustments to it.
So I guess I'm just looking for some advice on where to go next with my diag process.
Fuel is properly mixed at 40:1, carb is clean and it is getting fuel. there is no pressure building up in the gas tank, so I don't think I have vapor-lock. There is a consistent, blue, spark. The plug is new and gapped to 0.025", and the coil air gap is 0.012". Air filter and spark arrestor are both clean and clear. I fpulled the flywheel and the key is not sheared, and the magnet is still strong. Compression for the motor is 130psi, and I inspected the cylinder to find the original crosshatching still present, no major scoring.
I have no excessive smoke and the spark plug is never wet, so I don't believe it is flooding, but I tried following the directions for starting a flooded engine anyways, still to no avail. A few nights ago I decided to spray a bit of carb cleaner throught the intake of the carb (I know, Its bad for the engine) but I got one little put from that and that was it, I tried a second time and got absolutely nothing. Which makes me thing it is more ignition related. The spark looks fine outside, but I have no idea how good it is when under compression.
I disassembled and cleaned out the carb, and set the idle and mixture screws to 1 1/4 turns out, which is what the service manual said to use for a fresh rebuild before initial tuning, but I can't get it to run long enough to make any adjustments to it.
So I guess I'm just looking for some advice on where to go next with my diag process.