I have to put a new piston on my saw I have the engine striped down.do i have to press the bearings off the crank shaft to replace the piston ? or what is the best way to do this
No, you take off the cylinder well. install the rings on the piston and install the piston into the well. place the bottom piston unto the crankshaft and place the rod bearing. and reinstall all the other components.
