Well it does it no matter what the weather conditions are. It also only has to sit for like an hour. I don't want there to be anything wrong with my machine, however, if there is something that need attention, I want to have it fixed before it turns into something more major!

 

Valve guide seals and or guides. Like others have stated don't stress about it unless it gets really bad.

 

sounds like valve seals or guides. I wouldnt worry to much about it unless it gets worse and starts losing power