Drivetrain Lubrication
Always replace the drivetrain parts when they are
damaged or show visible wear or injury and damage
may result.
Lubricating the driveshaft 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.
1. Use a #1 Phillips screwdriver to remove the 4 screws
from the jet pump nozzle.
2. Hold the jet pump nozzle at the base and gently pull it
away from the hull to unhook it from the steering link.
Tip:
When removing the jet pump nozzle, move
the servo arm so that it provides slack to the
steering link and allows you to pull the nozzle away
from the boat. You do not need to remove the
steering links from the jet pump nozzle to service
the propeller shaft.
3. Use a 2mm driver to remove the grub screw from
the shaft side of the motor coupler. You do not need
to remove the grub screw from the motor end of
the coupler unless you are removing the motor or
replacing the coupler.
4. Free the propeller drive shaft from the motor coupling
and gently grip the shaft to pull it away from the
motor coupler.
5. Lubricate the half of the propeller shaft that
inserts into the motor coupling with marine grease
(DYNE4200 or DYNE4201).
Tip:
There is no need to lubricate more than half of
the length of the propeller shaft because only half
of the propeller shaft is contained in the jet pump
housing.
IMPORTANT:
Excessively greasing the shaft can
cause grease accumulation in the jet pump housing,
which can cause water-flow restriction through the jet
pump. It will not damage the drive system, but it may
decrease water flow through the jet pump, or attract
debris that will to stick to the grease.
6. Reinsert the propeller shaft into the pump housing
using the hole on the motor coupler. Use the grub
screws thread as a guide to find the flat spot on the
drive shaft to determine how far to insert the shaft
into the coupler.
IMPORTANT:
Ensure that the flat spot on the shaft
is oriented correctly. Do not screw in the motor
coupler grub screw until Step 9.
NOTICE:
Do not push the propeller shaft too far
into the coupling or it can bind against the jet pump
housing, causing damage.
7. Lubricate the jet pump nozzle bushing with a small
dab of marine grease. This metal bushing supports the
rear end of the driveshaft.
8. Use a #1 Phillips screwdriver to carefully reinstall the
jet pump nozzle.
9. Use a 2mm hex driver to install and tighten the motor
coupler grub screws.
10. Power the boat and apply a small amount of throttle
to ensure the shaft is inserted properly.
Do not touch the pump housing.
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. You can also use water displacement spray
to help prevent the parts from corroding.
NOTICE:
Because of its corrosive effects, running RC
boats in saltwater is at the discretion of the modeler.
10
EN
Jet Jam
