I would have to agree with Bill,  

To fix you furler it will probably take a new motor, and maybe a new gearbox.  I would rebuild the old gear box and carry it as a spare.  I carry a new spare motor, and a spare rebuilt gear box, ready to go in case of a problem.  Someone mentioned that the new motors are a different diameter, and I found this out as well.  I built up the diameter of the the motor where it attaches to the cover attachment with some good tape.  Just about 3 to 4 times around the motor with some good tape and the cover attachment piece fit snugly on the motor.  It was in one of my videos about the Main Sail of a Super Maramu.

Ken Powers
Aquarius
SM2K 262

Part 1 - https://www.youtube.com/watch?v=qxxNAIa8-mg

Part 2 - https://www.youtube.com/watch?v=F0HIWBv1Pfc

Part 3 - https://www.youtube.com/watch?v=4bdvDqBMqxs

Part 4 - https://www.youtube.com/watch?v=9Srg4Q2oL5I