May 15, 1978
Operating Procedures (cont’d)
To raise from down and pinned position:
Plug in winch electrical cable.
Check for obstructions on posts and I-beam.
Spray full length of screw jack with silicone lubricant through slots on both sides of
If raising to mid position, remove lower pin and lower of the two mid position pins.
If raising to full position, remove ALL pins.
Activate winch _UP.
Raise until I-beam is just above the lower mid position pin hole or the upper position
pin hole depending on location desired.
Insert all pins.
Lower the keel until it contacts the pin.
Disconnect and stow electrical cables.
CAUTIONS AND NOTES
NEVER ACTIVATE WINCH TO RAISE OR LOWER KEEL AGAINST A PIN IN
FORWARD POSITION. DAMAGE MAY RESULT.
WHEN TRAILERING, KEEL MUST BE LOWERED SO THAT ITS FULL WEIGHT IS
RESTING ON THE TRAILER. IT IS NOT PINNED WHEN TRAILERING.
Note: Manual Operation - Your MEGA screw jack mechanism is provided with a manual
back-up to the electrical system should it be required. To use, remove the inspection cover
on deck. Insert the winch handle on to the top of the threaded screw jack. Disconnect the
chain from the sprocket on the screw jack by loosening the winch motor mounting bolts and
sliding the motor aft. Now follow the same procedure as outlined with the electrical system.
The handle will require considerable effort to crank and it will take some time to raise or
lower the keel. This is provided as an emergency back-up system only.
Note: The screw jack will not allow the keel to move or fall. Only by turning the screw can
the keel be moved.