3-1. Perform all pre-operation maintenance on the Velvet Drive transmission (see paragraph
3-2. At the helm place transmission selector control in Neutral before starting engine.
Shifts from any selector position to any other selector position may he made at any time
below 1000 rpm and in any order. Shifts should he made at the lowest practical engine
CAUTION: Shifting above 1000 rpm can severely
transmission and engine.
a. Neutral: Move selector lever to the middle position. You should feel the detent center
the shift lever on the transmission through the linkage to the selector lever. With the
control in this position, hydraulic power is completely interrupted and
the output shaft of the transmission does not turn.
b. Forward: Move selector lever to the forward position. You should feel the detent.
The shift lever on the transmission in the forward position. The output shaft and the
propeller should move the boat in a forward direction.
WARNING: If boat moves backwards with the selector
control in the forward position, shut off engine (see paragraph 2 -5) or consult Your
nearest Velvet Drive distributor.
NOTE: This problem can be a result of improper
by the boat builder or service
CAUTION: Early gear failure will occur when the
is operated in
reverse to obtain forward propulsion.
c. Reverse: Move selector lever to the rear ward position. You should feel the
detent. The shift lever on the transmission is in the reverse position. The output shaft
and the propeller should move the boat in a reverse direction.
3-3. Velvet Drive Transmission Operation
a. Place selector control in the Neutral position.
b. Start engine and set throttle at idle speed and warm up transmission oil for a few
c. Be aware of any unusual noises or vibrations and investigate to determine the cause.
CAUTION: Before checking oil, shut off engine. Hot
oil could cause burns.
d. Shut off engine and check transmission oil level and add oil, if required, to the full
mark on the dipstick.
e. Restart engine.
It has been determined by tests and practical experience that all Velvet Drive
marine transmissions can be free-wheeled without risking damage in sailing or trolling
applications. Caution should be taken to be sure that proper oil level is maintained prior
to freewheeling as well as normal running. Freewheeling one propeller of a twin engine
boat at trolling speeds will not cause damage to the transmission connected to the
4-1. Storage requires special care. Before winter storage one must:
a. Disconnect battery.
b. Drain water from the transmission oil cooling system.
c. Wipe transmission free of dirt, grime and grease.
d. Touch up unpainted areas of the transmission using suitable paint.
e. Loosen attaching hardware from transmission output flange and propeller shaft coupling
flange before removing boat from water and separate flanges.
5-1. Velvet Drive is a self-contained, precision built marine transmission. Should trouble
occur, consult Table 5-1 for remedy.
Table 5-1. Velvet Drive Troubleshooting
Oil in fly wheel housing. Unknown.
Oil on transmission. Loose bolts.
Tighten to specifications.
Loose drain plug.
Oil around retainer. Retainer bolts loose. Tighten to
Oil and water mixed. Damaged oil cooler Service
High oil temperature. Oil level low.
Oil level high.
Drain oil to full mark
Dirty oil cooler. Replace cooler.
Low water level.
Fill cooling system.
Shifts hard. Selector control.
Slow engagement. Selector control.
Low oil level.
Boat won't move. Improper selector position. Adjust, replace.
Low oil level.
Propeller missing broken. Replace.
Transmission malfunction. Service facility.
Charging pump reversed. Service