my husqvarna 455 rancher chainsaw won't start, just pulls and pulls. what gives?

This is almost always a fuel or air issue. Check the most common causes in order.

1. Check the fuel. It must be fresh, high-octane gasoline mixed with a high-quality 2-stroke oil at a 50:1 ratio. Old fuel gums up the carburetor.
2. Check the air filter. A clogged filter chokes the engine. Remove it and clean it. If it's damaged, replace it.
3. Check the spark plug. Remove it, clean off any carbon deposits, check the gap, and ensure it's not fouled. If in doubt, replace it with the correct plug for the 455 Rancher.
4. Ensure the chain brake is disengaged. The engine won't start if the brake is on.

IF THAT DIDN'T WORK: The carburetor might need adjustment or cleaning. The idle speed or low-speed (L) jet may be set incorrectly. This requires specific tools and knowledge; if you're not comfortable, take it to a servicing dealer.

HEADS UP: Always use the decompression valve (if equipped) to make starting easier. Follow the cold-start procedure exactly: set the master control lever to the choke position, pull the starter cord until the engine fires, then move the lever to the fast idle position and pull again.