Blackjack 42 8S Catamaran - Manual
Drivetrain Lubrication
Always replace the drivetrain parts when they are damaged or
show visible wear or injury and damage may result.
Lubricating the flex shaft is vital to the life of the drivetrain.
The lubricant also acts as a water seal, keeping water from
entering the hull through the stuffing tube.
Lubricate the flex shaft and all moving parts after every 30
minutes of operation. Remove, clean, and lubricate the flex
shaft after every boating session.
1. In the hull, use a 12mm and an 11mm open-end wrench
to loosen the collet nut from the flex shaft.
2. Remove the two screws that secure the propeller strut
from the mounting arm and the break away screw and
rotate the rudder up.
3. Slide the flex shaft and propeller strut down and out from
the stuffing tube toward the rear of the boat.
TIP: Use paper or cloth for cleaning and lubricating the flex
shaft and other drivetrain parts.
4. Wipe the old lubricant and material from the flex shaft.
5. To remove the propeller strut, remove the propeller by
removing the two prop nuts and slide the propeller off
of the shaft. Using a 1.5mm driver loosen the drive dog
setscrew, and slide the drive dog off the prop shaft. This
will allow you to slide the prop strut off the flex shaft to
lubricate the prop strut bearing.
6. Lubricate the full length of the flex shaft assembly up to
the drive dog using marine grease (PRB0101 or PRB0100).
Also apply grease to the collet threads.
7. Carefully reinstall the flex shaft as well as the drive strut
into the stuffing tube and collet. Ensure that the flex shaft
is fully pushed into the collet. If the flex shaft is difficult to
remove or install, use a flathead screwdriver to spread the
grips of the collet.
Ensure there is a 1–2mm gap between the drive strut and
drive dog to allow for flex shaft shrinkage under load.
TIP: It is a good idea to check the breakaway screw for any
wear and replace if necessary.
TIP: If your flex shaft is not perfectly aligned with the collet,
add shims to the stuffing tube support to center the flex
shaft to the collet.
NOTICE: Running the boat in saltwater could cause some
parts to corrode. If you run the boat in saltwater, rinse it
thoroughly in freshwater after each use and lubricate the
drive system.
NOTICE: Because of its corrosive effects, running RC boats
in saltwater is at the discretion of the modeler.
INSTRUCTION MANUAL
11
EN