Should be as easy as it looks. Look in the overhaul manual and you’ll it;s just the four screws that hold the stator in place. if you’re replacing the rotor as well, you’ll need a piston stop.
Wondering how you figured out that it was the stator breaking down without having swapped it out?
Tony, tried a different motor and it ran fine with the same electronics. So we thought it was either the stator or the coil. New stator seems to have fixed it. Note: do not put the rotor on upside down or it will not run.