Adjusting the Neutral Control - First, set the Blast on its stand, turn
on the transmitter, and plug a fresh battery pack into the speed
control. Set the throttle trim slider on the transmitter to the middle of
its range. If the Blast’s motor is running, gently turn the neutral control
right or left until the motor stops running and the L.E.D. is off (neither
green or red).
Adjusting the Proportional Control - After setting the neutral control,
move the throttle lever on the transmitter to full throttle. Now, carefully
adjust the proportional control right or left until the motor is running
at its fastest speed and there is a strong green light emitted from
the L.E.D.
CENTERING YOUR SERVOS:
Whenever your radio system has been removed for service or cleaning,
the steering servo must be recentered prior to installing the radio
system in the model. If the radio system is already installed in the boat,
disconnect the servo horn from the servo.
Connect the steering servo to channel 1 on your receiver and the
electronic speed control to channel 2. The white wire on the servo
cable is positioned towards the crystal. Nothing connects to the
“batt” terminal on the receiver.
Place fresh “AA” batteries in the transmitter and turn the power switch
on. Slide the throttle and steering trim adjustments to the center
position. Connect a fresh 7.2V battery pack to the electronic speed
control and turn the power switch to the
ON position. The servo will
automatically jump to its center position.
Turn off the electronic speed control switch followed by the transmitter.
The servo is now ready to be installed. Be careful not to move the servo
shaft when installing the steering linkage. Readjust the electronic speed
control as described in the previous section.
VISUAL INSPECTION:
Visually inspecting the mechanical integrity of the Blast should be done
before each run.
1) Normally, very little water will accumulate inside the boat. Empty any
standing water out of the boat between runs. Drill a small hole (
1
/
16 in.
)
in the front of the boat to drain the water. Do not drain the water out
of the back of the boat (near the radio system).
2) Check the wiring for any frayed wires or loose connections.
3) Check the tightness of the grub screws in the collars on the steering
linkages and in the universal joint yokes (connecting the outdrive to
the driveshaft and the driveshaft to the motor). Threadlocking
compound can be applied to these screws to prevent them
from loosening.
4) Check the mounting of the receiver and servos.
5) Check the rubber driveshaft seal for cuts and tears. Do not attempt
to run the Blast if this seal is damaged.
6) Check the tightness of the propeller. Hold the u-joint and turn the
propeller clockwise until it’s fingertight. Visually inspect the prop for
nicks, dings and warpage. Replace if damaged.
7) Check the operation of the radio system, especially the condition of
the batteries.
8) Visually inspect the hull for any cracks, damage or possible leaks.
9) Check for deterioration of the rubber band which holds the top hatch.
DRIVING THE BLAST:
Select a body of water (at least 10 inches deep) which is clear of
moss and grass. Do not drive the Blast in rough, choppy water or
in high wind (more than 15 MPH). These conditions could cause
your Blast to flip over.
The Blast’s steering is very sensitive, a slight input on the steering
control will have a large effect on the boat. When the boat is in
open water, adjust the steering trim on the transmitter until the
boat travels in a straight line on its own.
(Note: The blast will
only travel in a straight line on its own when it is heading
straight into or away from the wind. Crosswinds will require
constant steering input to maintain a straight course.)
To prevent spin outs, avoid sharp turns at high speed.
Always be ready to reduce the throttle if the Blast appears to be
unstable or “chine walking” (rocking violently from side-to-side).
Always reduce the throttle when turning, especially in rough
water.
Jumping the Blast or towing anything with it should
not be attempted.
Return the Blast to shore at the first sign of weak batteries
(Blast will begin to slow and the controls will become sluggish).
Cavitation - If the Blast is running at full throttle but is only barely
moving forward then the propeller is cavitating. Try advancing the
throttle slowly to get the Blast on plane. If you are having trouble with
cavitation, check the propeller for nicks or tangled debris. The Blast’s
propeller is specially designed for its application, therefore, it’s very
sensitive to any changes or modifications. If the prop is damaged it
should be replaced.
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STOP STOP
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1
/4 Turn
Center
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ELECTRONIC SPEED CONTROL
