Saw worked fine for a 20 minutes or so, then instead of idling it would die. Re-started easily. Thought it was possibly overheating, so let it cool down for an hour or more. Now it won't start. Doesn't even deliver any promising starting sounds.
I don't know how to access the spark plug to check it out?
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It sounds like it may be getting lean at that point, and it could be something like a tank vent. When this happens, open the filler cap, close it, and see if the saw will start.
Another easy test is to fill the tank completely in the event that a small hole has formed in the fuel line inside the tank. I doubt that is the problem, but worth the time to check before moving on to other tests.
If that doesn't work, disassemble the carburetor and clean all passages with non flammable brake cleaner (carburetor cleaner can damage check valves and soft small engine components). Sometimes dirt can accumulate in places that affect how the diaphragm moves.
If none of this works, have a service shop evaluate the unit. Pressure and vacuum tests will reveal the culprit(s) and determine if the saw qualifies for service.
either blocked fuel filter in the fuel tank ( hook out and replace ) or the fuel tank breather is blocked thus causing a vacume in the tank, to prove this, when the saw starts to die slacken off the filler cap, this will allow air into the tank and it should pick up again, the breather is pressed into the tank on the r/h side rear.
I'd guess at a dirty carb. If its been sitting the gas may have gone bad and clogged up the carb. Try spraying some carb cleaner in the mouth of the carb. It's possible that the idle is turned up too high to compensate for clogged ports in the carb. This is a possibility but not a guaranteed solution. Good luck.
the problem is in the ignition coil.it needs to be replaced.it is under warranty.its warranty is life time.call husqvarna and they will either send you a new one or send you to a husqvarna dealer to fix the problem.that is at no cost to you..............let me know if this helped.................
had the same problem the other day with my model 55 rancher found the pin missing that holds the handle to the trigger mechanism once i found the pin put it back in the handle the unit works fine. the pin is about 1/8 X11/4 " long.
Your carb may be the issue but your ignition coil could be the culprit. Once they start going bad, they can act up intermittently or give various symptoms from day to day. The fact that your saw dies at full load or under load, probably means that when your saw gets hot or requires more spark, your coil is not able to provide it. Your carb is easy enough to clean out, you can take it all apart and clean all screens, etc....
I just replaced my coil due to the exact same symptoms and now my saw runs great. $60 off ebay and you can put it on in 15 minutes yourself. Check your carb first though
Turn the Hus 345 chain saw upside down, you may see a little Icon of a oil droplet and a + - arrow by the chain. THe adjustment screw is not pictured in any of the standard user manuals,. but it is a small black slot headed screw over a rectangale metal tab by the chain. I believe if you turn it counter-clockwise, it will give you more oil,, It did for me. If you have the bar off, you can start the saw and see it come out the hole, that would verify your oil pump is working. Make sure the holes on the bar are clean also. running the saw at a fast idle for 1 min should oil the chain well enouth that it starts spraying off the end of the bar when you gun the engine.
two things could be happening.......first is vapor lock......make sure you breather tube is clear and working........next is ....it could have a bad ignition coil on it.....after the coil gets hot the spark can become irratic or just not work any more.....
If it idles it is not flooding out as it it most vulnerable to flooding at idle if the stalling is happening as you try to throttle it up it is likely starved for fuel. Start by changing the in tank fuel filter, and the spark plug. good chance that will solve your problem. If it does not Turn the high idle screw out in 1/8 turn increments try running the saw after each adjustment. Keep track of the amount that you turn the screw. you might have to put it back to its original position. Some times adjustment screws will vi berate out of adjustment and other times crud will cause fuel restriction opening the screw allows for a larger port for any restrictions to pass through. After you use the saw for a short time turn screw back in if it starts to stall at idle or you notice increased smoke.