It's been said over and over, but sometimes, I still forget to check the exhaust port first.
In the past 2 weeks, I've had four 2-cycle engines that would run, but not rev up! I bought a used Kawasaki commercial trimmer off eBay, it started great, idled great, but wouldn't reach full rpm--exhaust port was almost totally blocked with carbon. Another Kawasaki trimmer brought to me by a commercial cutter, same problem, same solution. Small Echo backpack blower mentioned in thread "Echo hard to start when cold", and a small 2-stroke generator--all had severly carboned exhaust ports. (The exhaust port problem was not the Echo blower hard to start problem.)
If your 2 cycle starts, idles, but doesn't rev up, check the exhaust port for carbon by removing muffler--clean if needed (I use a popcicle stick to clean the port).
In the past 2 weeks, I've had four 2-cycle engines that would run, but not rev up! I bought a used Kawasaki commercial trimmer off eBay, it started great, idled great, but wouldn't reach full rpm--exhaust port was almost totally blocked with carbon. Another Kawasaki trimmer brought to me by a commercial cutter, same problem, same solution. Small Echo backpack blower mentioned in thread "Echo hard to start when cold", and a small 2-stroke generator--all had severly carboned exhaust ports. (The exhaust port problem was not the Echo blower hard to start problem.)
If your 2 cycle starts, idles, but doesn't rev up, check the exhaust port for carbon by removing muffler--clean if needed (I use a popcicle stick to clean the port).
