Chainsaws

I recently bought a leftover 575xp online,and have the warranty paperwork sent with the saw,in the box,seller is apparently not a registered dealer,but has many of these for sale.Is there still a warranty available?Im also told these had a factory problem with the crankshafts,the serial number is 05 1400649,is this one of the saws that may have the crank problem?Thanks,if this has the crank issue,will it be a repairable problem with new crank,etc.?Thanks a bunch,I will wait for your reply before i fuel this and run it,Keith Johnson