My 5105 doesnt have the easy start. I pulled the limiter caps to turn down the rpms to 13,900 to 14,000
where the saw seems to pull the hardest in the cut. So that is correct concerning the non-easy having 14,500
available. With only 50cc being pulled over the easy start probably is a nice feature but certainly not necessary.
Cat muffler changed out with a 5100s dropped weight and 40 degrees or so at the muffler port. I watched the
dolmar sponsored timbersports at a outdoor exhibition, they had the cat equipped 5105s racing cutting cookies in approx. 18" logs and the saws third cut were slower than the first two, and just from listening to the saws
slow as well, I contributed that to heat. Mine never slows cut after cut no matter how many cuts you make.
Just my observation and thoughts. Once heat crosses the optimum degree needed for combustion h.p. will
begin to fall off in most engines.
If the cat could not be removed or replaced I wouldn't own the 5105. Otherwise it is a fun saw and a good
value, especially when you find one used as new under $400.