I ordered a ignition module after not seeing the spark plug fire but after playing with it found out it was the kill switch. Even before I was having a hard time starting it, After running for a while it would die and I would strugle to get it going again. I went to a shop and they told me to change the fuel and do the 40:1 mix I will try this and keep you posted
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Re: no start problem Poulan Pro PP4218AVX
I own 4 saws corrently--- and i have had numerous saws over the years. i even had a business for 9years manufactureing lawn mowers and selling and servicing small motor s and chainsaws etc.------ and i would never use or allow to be used a fuel .oil ratiogreater than 25 to 1----- for what it is worth! but conditions here in aust may be different to usa
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Try a fresh spark plug first--gapped 0.020". If no help, remove the engine left side cover to expose the flywheel and ignition module. Turn the flywheel until the magnets are under the module poles, insert a thin business card into the pole gaps, loosen the screws holding the module, and let the module be drawn to the magnets. Tighten the screws and turn the flywheel somewhat to remove the card, then turn the flywheel one full turn to make sure the pole gaps don't close up further at any point. Remove the ignition switch connection at the body of the module (not the connection at the poles), then try for spark again. If still nothing, replace the ignition module using the above method. If you did get spark, return the switch connection to the module and try again. If nothing, check the switch circuit for being grounded at some point. Hope this helps!
Start first with a fresh spark plug set at 0.020" gap. Make sure ignition switch is on. If still nothing, remove the cover from the flywheel. Set the ignition module gap by using a thin business card between the module poles and the flywheel magnets. Loosen the mounting screws, let the module contact the magnets, and re-tighten the screws. Turn the flywheel to remove the card, then rotate the flywheel on full turn checking that the gap doesn't close-up any further. Check for spark again--if still nothing, remove the ignition switch wire from the ignition module. Check for spark--if spark now occurs, check the condition of the ignition switch or the connecting wire may be grounding out somewhere in between. If still nothing, replace the ignition module. Hope this helps!
If you are speaking of the ignition module, the flywheel magnets induce a high voltage from an internal coil through a diode and into a capacitor and then the magnet position controls a transistor that discharges the capacitor into the ignition primary coil and that induces spark voltage into the ignition secondary coil which fires the plug. It requires several revolutions of the flywheel to charge the capacitor and why it takes several pulls of the starter to get the plug to fire regularly. That's a lot of action inside such a small package! Hope this helps!
Look for a pinched/bare stop-switch wire (I assume that you don't have spark now). Also, check the ignition coil core gap to the flywheel magnets (I use card stock to set the gap). Make sure the plug wire was not damaged again.