You have to remove the cylinder first to remove the piston and rod.

A prop hub puller tool is needed to removing the prop driver/hub.

This being said taking apart a good running engine is not a good thing.

If You pull the piston out of the cylinder it will need a new break in period and shorten it life.

Pulling the muffler & removing the head & back plate is all I do to inspect an engine or to flush it out if it's new before break in.

An engine that is running good doesn't need any thing but after run oil and a zip lock bag.

The only time I disassemble an engine is when it's had a dirt nap or needs new bearings, P/L or new ring.

So if it's not broke don't fix it, comes to mind.

Jeff