Fellers, this may become a chore, as I know nothing about this or other 4 strokes fro models.
I checked valve lash (.003"), high needle 3 turns out, throttle ~1/2 and attempted (vertical bench mount) to fire the .40 today and couldn't get even a pop.
Now I know that the 3 magic ingredients to starting an engine are fuel, compression and ignition (in the proper sequence and quantity).
I mixed a fresh batch of 15/65/20, had good color on the plug and seeming good hand-flip compression, 'til I spun it a bit.
I'm wondering if it has a worn ring and am checking with Frank to see if he still has one.
I don't have any service info covering tear-down procedure.
If I need to replace the ring (N.B.: it has a one-piece head/cylinder) is it just a matter of pulling intake, exhaust and then the cylinder from the piston w/o disturbing the valve assy (other than the pushrods, of course) or is it going to be more complicated?
Any assistance will be much appreciated.
Terry