The chain saw won't start when it is hot
After cutting wood and there is a need to add fuel and oil. The saw is refueled but will not start back up.
Garden - Husqvarna - "Chain Saw - 16" Bar, 3 Hp
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Answers & Comments
Remove the spark plug to check for spark when it doesn't run. If spark is blue and snappy, pour a little fuel mix into the plug hole, replace the plug, and try to start. If you get a few pops, then concentrate on the fuel system. Check the fuel filter, air cleaner and muffler for any plugging. Check the condition of the fuel lines. Make sure the carburetor fasteners are tight including the ones holding the carburetor to the cylinder. Make sure that you are using fresh fuel with modern synthetic saw oil mixed at 50:1 ratio. Premix the two in it's own can and shake vigorously before filling the saw. If still having a problem, disassemble the carburetor, clean, and re-kit if necessary. Pay particular attention to the lower chamber diaphragm and the fuel metering valve that it controls. Go to: http://www.drystacked.com for a 12 page article on Walbro brand carburetors for great theory and troubleshooting information. Hope this helps!
If you got no spark at the plug in the first test, remove the flywheel cover and remove the ignition switch wire from the ignition module. Repeat the spark test. If still nothing, replace the ignition module which is failing with engine heat. Use a thin business card for a module gap, turn the flywheel magnets under the new module, loosen the mounting screws and allow the module to contact the magnets through the card--then re-tighten the mounting screws. Turn the flywheel to remove the card, the turn the flywheel one full turn while watching the module gap--it should not close up at any point. Attach the ignition switch wire. Recheck for spark. Good luck!