Pro Boat PRB3900 - Manual (Page 9)

9
The electronic speed control (esc) features a
Ni-MH/Li-Po switch to easily change the cutoff
voltage for each battery type.
Caution: It is imperative that you do
not attempt to use Li-Po batteries in the
WidowMaker 22 Brushless unless the cutoff
switch is in the Li-Po position or serious
damage to the batteries and electronics
may occur.
Note: Do not turn off the transmitter first
or the receiver may pick up stray signals
and run out of control.
Before and at the end of each run, make sure
all screws are tight and the propeller is free
from any entanglement.
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 box.
Lubricate the flex shaft, propeller shaft
and all moving parts after every 2–3 hours
of operation.
 1. Use either two crescent wrenches, two
10mm wrenches, or a combination of
either to loosen the collet nut.
Section 9: Speed Control Programming
Section 8: Maintenance
Section 10: Lubricating the Drive Shaft