What make were they? If they were the $100 chain store whippys then they can be troublesome and time consuming to repair, and sometimes hard to get parts. And sometimes the mechanic is just a modern day remove and replace person and not a genuine repairer/fixer mechanic. I had a stihl blower that the dealer couldn't repair. Cost me $130 to have it serviced and it still wouldn't run properly. Some months later I just happened to start going to a mower mechanic in an industrial area and he seemed to know his stuff, so I gave him the stihl blower. He pulled the starter , no fuel but he was able to say that the muffler was carboned up. He fixed it and I'm still using it. I think we are losing mechanics who can repair.