I got the drive shaft out and I pulled the gear case out as well. The gear case shaft that the drive shaft connects to has about 1/4” play in it side to side so I think that’s the issueNo need to pull the engine.
With a little head scratching the body work can come off making access a lot easier.
From memory, the front half and the rear half are sepatate
Replace the coupling and likely the other issues will be solved
Dave