Husqvarna 272xp carb tear down - Husqvarna Forest & Garden No.967012396 345 16" Gas Chain Saw

The square nut should slide into the housing to stop it from rotating. The nipple end should also fit into the case behind the protector plate.

Try changing the air filter first as a dirty filter will cause an engine to flood and hard to start. Do this before you start tearing anything apart.

http://www.mediafire.com/view/2rggj4jtbg080ih

crank back?

Yes there is no problem swaping the ignition module, set the air gap to 0.3mm.

One turn out from lightly seated on both High and low speed jets. Not supposed to use stock answers on here but I just made a post recently that may be of help....Cheers!
http://www.fixya.com/support/t7263870-350_will_not_stay

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.

1. It could be the coil.
2. It could be the run/stop switch.
3. It could the interconnecting wiring. Is it continuous? Is it shorted? HTH Lou

carb needle probably stuck you may needto take of carb and gentle clean it with carb spray but be carefull the gaskets are very thin if you tear them you must buy a $15 carb rebuild kit

Depends on the vintage, turn the saw upside down and you can see a screw to turn, 3 settings, right under the clutch and shaft. use a screw driver if it is adjustable. I like to keep mine set on high, oil is cheaper that new chains and bars. Use a bar oil, not old used motor oil.