Pro Boat PRB4250B - Manual (Page 10)

Impulse 31
Maintenance
CAuTION: Always replace the flexshaft when it is
damaged or shows visible wear. Failure to do so could
result in personal injury or property damage.
Lubricating the flexshaft 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 box.
Lubricate the flexshaft, propeller shaft and all moving
parts after every 2–3 hours of operation. Always replace
any parts that show visible wear or damage.
1. Loosen the coupling between the motor and
the flexshaft.
2. Loosen the setscrew from the flexshaft and remove
the flexshaft from the back of the boat.
Tip: Use paper or cloth to touch the flexshaft.
3. Remove the drive shaft by sliding it out of the stuffing
box. Wipe lubricant and material from the flexshaft.
Lubricate the full length of the flexshaft assembly
up to the drive dog using marine grease (PRB0101
or PRB0100).
4. Apply threadlock to the coupling setscrew.
Threadlock will help prevent the flexshaft
from loosening during use.
5. Carefully reinstall the drive shaft, ensuring that there
is a 1–2mm gap between the prop strut and the drive
dog to allow for flexshaft shrinkage under load.
NOTICE: Running the boat in saltwater could
cause some parts to corrode. If you run the boat
in saltwater, rinse it thoroughly in fresh water
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.
10