If its flooding, it is likely a spark problem especially if its intermittent. Plug might be the problem if youre lucky.
You need to pressure test the carb, if the needle is leaking you will never get to run well, if you have fitted a new rubber tipped needle and it still leaks you will have to replace the carb, the later carb was a Zama rather than the Walbro, it made the saw run so much better.
Check that the hose from the gas tank is working clear. And that the filter is unclogged in the tank. Also check for any leaks in the hose.
Check the spark plug for fire. Connect it to the spark plug wire and clamp the plug thread to ground away from the gas fumes. Then pull the crank . It should have a good spark . If not try another spark plug.
If a known working spark plug does not work, then it is either your coil or a spark related issue.
SOURCE: Husqvarna 123L, won't start. Replaced carb, sp plug, ign module.
are you getting fuel? is the plug wet after cranking a few times and then pulling plug? check the fuel filter.and fuel line inside of tank, the line could be broken or filter is plugged inside of tank, this is usually the problem when the unit is old
SOURCE: Husqvarna 350 running problem
Pull off the exhaust, does the piston look ok?
If scored thats not good.
If ok check fuel filter , pressure test lines or remove and check for cracks. Just a start but check easy stuff 1st or get back to me with more info, cheers
SOURCE: I have a No.359 Won't stay running, I put new
The carb screws have anti tamper sleeves on ( one red one white ) to adjust the screws you need to draw the caps back, you can do this with a small self tapping screw, screw it into the centre of the cap, when it hits the adjuster underneath the cap will draw back as you carry on screwing it in, only pull the cap back far enough ( approx half way ) you can then remove the screw and insert a 2mm flat blade screw driver through the centre of the cap, the adjuster underneath will now turn, the reason not to take the can right off is because the screws are only 2mm across, and it is near impossible to adjust the saw whilst it is running.
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