How does one remove the piston from this engine?

Thanks

To remove the piston, remove the cylinder head, slide the liner up a bit to expose the wrist pin in the hole that's in the back of the crankcase. Extract the wrist pin through the hole, and then slide the liner and piston out of the engine. Use the reverse procedure to reinstall the piston.

Thanks,but how does one remove the wrist pin from the piston?

The pin just does not fall out. How can it be pulled out? Is it threaded internally?

Dave

Dave,

Sometimes it can be tapped out, other times, we use a small screw extractor inside the wrist pin. It grips and we then pull out the pin.

If it's a bit stuck, a bit of heat from a heat gun can help loosen it.

If the wrist pin is really stuck, due to burned-on fuel residues, sometimes the only solution is to cut the con rod. You can minimize chips by drilling a series of holes in the rod and then using nippers to cut through the bits left between the holes.

Cutting the rod is done only aa a last-ditch effort. Then the wrist pin can be driven out of the piston.