used my echo 1600 a few days ago. This thing is at least 17 yrs old and still runs w/ full power. I purchased these in 86' . I used them commercially for seven yrs. Before I got out of the biz. Had 2 of these but sold the other which was newer, to my employee who bought part of my biz. No telling how many hrs this baby has on them. We used them year round here in Florida on all our residential & commercial accts. The only thing is that that they have started putting out more and more exhaust fumes. Probably time to buy another pair. Guess this is common w/ older 2 cycles. Anyone else had this problem??