The rebuild kit is under $40.00. It includes a new sight glass as well. On our new to us boat, we have a Maxwell 3500 windlass, and it hasn't had the fluid changed since new. It has no leaks whatsoever, and I wonder it would would be possibly to suck out the old fluid with a "dipstick type" oil removal tool instead of having to remove the lower unit to do the job . . .
Vessel Name: Muirgen
Vessel Model: 50' Beebe Passagemaker