Stuck pinion
May I suggest the following:1)put oil in the pinion. 2)opened a pilers and clamp the smaller section of the pinion. 3) used a hammer to lightly tap the motor shaft .—— If the motor shaft doesn’t protrude put a drill bit in the hole from the top. But be very careful don’t hammer too hard or the drill bit would snap and don’t forget towear safety glass in case something happen.