Bought boat new in 2011, always starts easy runs great. Other than replacing the water pump and general maintenance no real issues. I am not hard on this motor in any way. The other Day I noticed that every time I put the boat in reverse a little bit of Blue Smoke came out, none in forward, only reverse. never noticed this before. Is this something to watch out for? Does it have any correlation or is it just cause I don't use reverse that much. Any advise is appreciated.

Motor maybe working a little harder in reverse. Let it warm up good in this cold water before putting it in gear. Don't think you have anything to be worried about.