thomas72
Addicted to ArboristSite
I have a low hour 3400 and just wondering what are the other compression ratio numbers on other saws being used by members at this forum. Mine is around 135psi, and trying to figure out if it needs rings. I have a 3700 Poulan but it has a thin ring piston and hits around 155psi, so it is hard to compare that to a 3400.