A very common problem is that the tip of the drive shaft breaks off. If it cuts with the pole retracted and won't cut with it extended, than the drive shaft is pulling out at the clutch end or at the head. Try loosening the screws where the pole goes into the cutting head, stand the unit straight up and twist the cutting head to see if it drops down even just a little bit. After trying that, loosen the screws where the pole goes into the engine assembly and twist it there also. If this doesn't work, remove the pole at the engine end and pull the drive shaft out to inspect the ends of the shaft. Good Luck. George
SOURCE: Chainsaw starts fine, but dies mid cut?
Immediately after saw quits, while everything is still hot. Sometimes ignition modules quit working when hot.
Ignition Coil Test
SmallEng.com
http://www.youtube.com/watch?v=L7WNBDRG4C4
You may need to use a jumper wire between the threaded part of the plug and the cooling fins. You don’t have to bend up the electrode.
Loosen fuel cap when it starts to die, If that fixes it it has a fuel vent problem.
If you did nothing to the carburetor adjustments, are using a fresh (3 months or less) fuel mix with the same oil/fuel ratio, and are operating at the same elevation there is a reason your saw is acting up.
It sounds as though there may be a fuel delivery problem. Check the fuel filter on the free end of a hose in fuel tank (manufacturer recommends an annual replacement). Check all fuel delivery lines especially at fittings and bends for cracks and holes. If those are good then the likely cause is internal parts of the carburetor. HTH
Lou
SOURCE: Echo Chainsaw keeps cutting off
does it start and run for a min or two then die try and remove the muffler and run it if ok open the muffler and clean the screen off
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