I tried a search on this but couldn't find exactly what I wanted. I'm wondering how long a good quality backpack blower (Redmax, Stihl, Echo) can be expected to last. Does anyone keep track of the approximate hours they have on their equipment? The EPA rating on these engines is 300 hours. It wouldn't be too difficult for some people to reach that within two years or three years. I have to believe these engines will go much longer than 300 hours if cared for. Also, when it does come time to replace these blowers, does anyone ever have them rebuilt? I notice that Redmax sells engine parts, including short blocks. Is it cost effective to rebuild one of these?