Hi Dave,
I have a ys63 that has about 8 gallons of fuel run threw it
is it time for a new piston ring and or liner?
I am asking because the compression is definitely not what it used to be and the
valve lash is @ spec
power master 20/20 is all that has been used and I don't see any carbon deposits
in the combustion chamber so I am assuming the valves are seating properly
Thanks for your time
Frank