My husqvarna would die when i pressed the throttle so I ran it with the gas cap off and it worked fine. I think that the vent is clogged but I don't know where the vent is located (doesn't seem to be in cap). Any suggestions?
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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.
need more info. It sounds like it does run or you would have stated it stopped working and will not work anymore. I need more info please. When it stops is it because you gave it the throttle and it quit or does it just up and die as if it ran out of gas in which case it will sputter first or does it run then instantly start to stop then instantly run again. What I can do at this point is give you somewhere to start. Number one the on off switch can be faulty and will cause it to start to instantly die and then immediately run again and also maybe go dit-dit-dit-dit while running like it was skipping or sputtering. How old is this saw? Inside the fuel tank is a filter. If you take a flashlight you will see it. reach in with something and pull it out with the hose. be careful not to damage the hose. Remove and replace the filter. If it runs good til it gets hot and if you loosen the gas cap it takes off running again, replace the gas cap as the vent hole is plugged. So if can reply back with more info.
I had a saw with a similar problem. I beleive you need a new carberator. I changed mine and my saw never ran so good. I think from all the vibration all the shafts/bushings have wore and now air is being sucked in from too many unwanted places keeping enough vacume to **** the gas out of the carb bowl.
There is a vent in the tank, it is situated on the right hand side of the tank, close to where the fuel hose exits the tank, the early vent looks like a round white pellet, the later vent is a white plug with a nipple on the top, the later vent will just pull out with long nose pliers, the early vent has to be extracted useing a self tapping screw, this of course will destroy the vent.
The vent on the 372 is not in the cat, it is situated on the right hand rear side of the fuel tank, the early vent was a black pipe pressed into the tank with a white ( vion ) plug in it, this can be pulled out by screwing a self tapping screw into the middle of it and pulling out with a pair of pliers, the later breather is in the same place but consist of a green valve pressed into the tank, it then has a black pipe conected to it which comes up into the crankcase and sits onto a nipple under the air filter, this can be pulled out with a pair of pliers and replaced, the later breather is very prone to blocking, due to CE law and gas escape from fuel tanks the breather is very fine.
Try removing the fuel cap for a moment to see it can be restarted immediately. If this works, check the fuel tank vent for plugging problems. Also, check for spark at the plug when it dies--if no spark, try a fresh plug gapped at 0.020". If nothing, the ignition module may be failing with heat. Good luck!
The temperature is not that different. Is there a fair change in altitude between the dealer and where you live? The jet screws have 'D' heads to prevent owner tampering--how did you adjust them? You need to allow the engine to warm up before pulling the throttle. Make sure the fuel mix is fresh and mixed 50:1 with synthetic chain saw oil--be sure to shake the container thoroughly just before filling the tank each time to prevent oil starvation. It has to be the manufacturer's problem because it is under warranty. It sounds like the jet screws are set fairly lean. Ask the dealer if you can buy the special 'D' head screwdriver to make your own adjustments. Hope this helps!