Polys C2

I have recently had problems with the starter motor of my '92 C2. It would sometimes refuse to start the car. Only the sound of the solenoid engaging could be heart. Try 2-3 times and then it would start. Once, the car needed a gentle push before it started and the car was warm.

I have a feeling since its a '92 model the motor gets a bit stuck due to old crease. I have checked the battery and is in good shape.

I wanted to extract the motor, but it seems to be impossible to get to the second 10mm alen key bolt on the motor.

Does anybody know how to take this part out without dropping the engine and gear-box?