Replace / Repair Vdrive to shaft coupling

[red0522v]

I have '05 22v. Went to lauch it and as I backed boat off trailer, prop stopped turning but motor continued to run. Prop would not turn in either forward or reverse. Removed floor and found that prop shaft is rotating in vdrvie coupling. I can hold the vdrive coupling stationary and my son can turn the propeller and shaft.
Anyone have experience / advice?

[docdrs]

sound like the set screw has come out of the side of the propshaft coupler and the nut inside is loose, look for the setcrew on the floor .02