Just a heads up about using de-comp on the new 372Xp XT saws.
Per a dealer on my site on hard starting 372 XT's
Cold start: Do NOT use the deco. Not sure why, but I suspect this top mount deco drops the compression a little too much in addition to makeing that first "pop" harder to hear. Especially when the saw is new. People would come in with flooded saws that would really fog up the parking lot when we got them going. Part of the problem though was guys continuing to pull with the choke on waiting for that pop. One is a good friend of mine and fellow member on these sites. I watched him trying to start his 2172 and counted 20 pulls with the choke on before I yelled at him to stop. Every person that has had this issue has solved it simply by not using the deco.
Warm start: Carb is just not adjusted right, because this is not a problem I've seen with any of the saws we've sold. I suspect that it's a little too lean on the LO side. Every one of these things come out of the box too lean on both the Lo and HI. When setting up a saw I open them both at least 1/4 turn before even trying to start it, then adjust from there.