A drive motor arrangement for replacing manual drives on an existing boat
lift winch shaft comprises a worm gear box with a worm driven by an
integrally mounted motor on the worm gear box. A worm gear is mounted on a
tubular cross shaft extending outwardly on opposite ends of the gear box.
The bore of the cross shaft is of size to slide over an existing winch
drive shaft. The tubular shaft has a drive connection that mates with the
existing drive connection on the winch box shaft. As shown a disc that
effects drives to a mating disc on the winch box shaft. After removing the
manual ratchet and wheel on an existing winch shaft, the tubular shaft of
the worm gear box can be put into place and a suitable fastener is used to
hold the drive connection on the tubular shaft in engagement with the
drive member on the winch shaft.
