I pulled the piston and the rings are barely extending beyond the piston. They are all intact but are hugging the piston pretty closely. I can easily replace the piston back in the cylinder with very light finger pressure on the rings. I'm going to put in a new ring set and see if it runs.
Good news, the cylinder head is holding water and I found my feeler gauges. Bad is what Tom3 said...I can get 80 thousandths gauge between the piston and cylinder and can push gauge all the way in between the red marks shown on the photo...no hitting the rings... So looks like I inherited a...
Engine began fluctuating rpms by itself, had little power under normal light mowing....even with the deck disengaged. Parked it for 4 days then tried to start it...doesn't fire. Is getting plenty of fuel, has spark. Fuel shut off solenoid is working. Checked compression with compression...