I just got a new CS2220 and I have about five hours on it. Is it common for it to shake violently on cold start up. I live in ND and the majority of winter is below freezing. I have tried to find a block heater but the dealer said they don't make them this small so I'm getting a pan heater just because. I've tried key back cycle plugs, key forward plug light out multiple times and it wants to shake itself apart when it actually starts. This start-up wasn't as bad but it still struggles a bit.