For repro below 2”
WHITE, THICK BLACK BORDER w/Simplified Tagline
MODEL 38104-5
170221 KC2494-R00
FIRE HAZARD! Your model does NOT accept
LiPo batteries. Do not operate your model with LiPo batteries.
Damage due to over-discharging may result. Your model uses
rechargeable batteries that must be handled with care for safety
and long battery life. Make sure to read and follow all instructions
and precautions that were provided with the battery packs and your
charger. It is your responsibility to charge and care for the battery
packs properly. In addition to your battery and charger instructions,
here are some more tips to keep in mind:
•Use the supplied NiMH charger to charge the included battery (see
Charging your Battery Pack in the Preparing to Run section). DO NOT
attempt to charge LiPo batteries or any other type of battery with
this charger to avoid damage to the battery or potentially causing
fire or personal injury.
•BEFORE you charge, ALWAYS confirm that the charger
settings exactly match the type (chemistry), specification, and
configuration of the battery to be charged.
•DO NOT attempt to charge non-rechargeable batteries
(explosion hazard), batteries that have an internal charge circuit
or a protection circuit, batteries that have been altered from
original manufacturer configuration, or batteries that have
missing or unreadable labels, preventing you from properly
identifying the battery type and specifications.
•DO NOT exceed the maximum manufacturer recommended
charge rate.
• DO NOT let any exposed battery contacts or wires touch each other.
This will cause the battery to short circuit and create the risk of fire.
• While charging or discharging, ALWAYS place the battery (all
types of batteries) in a fire retardant/fire proof container and on
a non-flammable surface such as concrete.
• DO NOT charge batteries inside of an automobile. DO NOT charge
batteries while driving in an automobile.
• NEVER charge batteries on wood, cloth, carpet, or on any
other flammable material.
• ALWAYS charge batteries in a well-ventilated area.
• REMOVE flammable items and combustible materials from the
charging area.
• DO NOT leave the charger and battery unattended while charging,
discharging, or anytime the charger is ON with a battery connected. If
there are any signs of a malfunction or in the event of an emergency,
unplug the charger from the power source and disconnect the battery
from the charger.
• DO NOT operate the charger in a cluttered space, or place objects on
top of the charger or battery.
•If any battery or battery cell is damaged in any way, DO NOT charge,
discharge, or use the battery.
• Keep a Class D fire extinguisher nearby in case of fire.
• DO NOT disassemble, crush, short circuit, or expose the batteries to
flame or other source of ignition. Toxic materials could be released. If
eye or skin contact occurs, flush with water.
• If a battery gets hot to the touch during the charging process
(temperature greater than 110°F / 43°C), immediately disconnect the
battery from the charger and discontinue charging.
• Allow the battery pack to cool off between runs (before charging).
• ALWAYS unplug the charger and disconnect the battery when not in
• ALWAYS unplug the battery from the electronic speed control when
the model is not in use and when it is being stored or transported.
•DO NOT disassemble the charger.
•REMOVE the battery from your model or device before charging.
• DO NOT expose the charger to water or moisture.
•ALWAYS store battery packs safely out of the reach of children
or pets. Children should always have adult supervision when
charging and handling batteries.
• Nickel-Metal Hydride (NiMH) batteries must be recycled or
disposed of properly.
• Always proceed with caution and use good common sense at all
Personal Safety Precautions
All of us at Traxxas want you to safely enjoy your new model.
Operate your model sensibly and with care, and it will be exciting,
safe, and fun for you and those around you. Failure to operate your
model in a safe and responsible manner may result in property
damage and serious injury. The precautions outlined in this manual
should be strictly followed to help ensure safe operation. You alone
must see that the instructions are followed and the precautions are
adhered to.
The Blast is not intended for use by children without the
supervision of a responsible adult. Every precaution outlined in
this manual should be followed to help ensure safe operation.
Traxxas is not liable for any loss or damages, whether direct,
indirect, special, incidental, or consequential, arising from the
use, misuse or abuse of this product including any chemical or
accessory required to operate it.
• Do not operate your Blast at night, or anytime your line of sight to
the model may be obstructed or impaired in any way.
• Never, under any circumstances, operate the Blast in any water
where people are swimming or wading. The Blast is very fast and
could cause injury if it should collide with anyone.
• Because the Blast is controlled by radio, it is subject to radio
interference from many sources that are beyond your control.
Since radio interference can cause momentary loss of radio
control, always allow a safety margin in all directions around the
boat in order to prevent collisions.
• Do not reach underneath the rear of the Blast. The propeller could
spin unexpectedly. Always pick up the boat from the front or the
• Because of the many dangers involved with any body of water,
Traxxas recommends that you never try to wade or swim to
retrieve the boat. The Boat Retrieval section of this manual outlines
safer methods for boat retrieval.
• Due to the high-performance nature of the Stinger 20-turn electric
motor, it will become extremely hot during use. Do not touch the
motor when installing and removing battery packs.
•Allow the motor to cool between battery changes, or anytime
excessive heating is noted.
•Most importantly, use good common sense when you are near
water to avoid mishaps such as slipping on a muddy bank. Always
observe water safety rules and regulations.
Thank you for purchasing a Traxxas Blast high-performance racing boat.
This manual contains the instructions you’ll need to operate and maintain
your new Blast. Look over the manual and examine the Blast carefully
before running it. If for some reason you think the Blast is not what you
wanted, then do not continue any further. Your hobby dealer absolutely
cannot accept a Blast for return or exchange after it has been run.
Please read all of the operating instructions and precautions before
attempting to drive your new Blast. These instructions are written with
the assumption that this is your first radio controlled model. Even if
you are an experienced R/C enthusiast, it is important for you to
read and follow the procedures in this manual. Pay special attention
to the mechanical and safety precautions outlined in this manual.
If you have any questions about your new model, then call Traxxas’
technical support line at 1-888-TRAXXAS (1-888-872-9927, U.S.
residents only. Outside the U.S., call 972-549-3000). Technical support
is available Monday through Friday from 8:30am to 9:00pm central
time. We hope that you will enjoy your Blast for many hours to come.
Required Equipment
To operate the Blast, you will need four (4) “AA” size batteries for your
Where to Run
Select a body of water (must be at least 10 inches deep) that is calm
and free of debris, tree stumps, moss, etc. Also, find a clean, stable
area of shoreline for launching. Be aware that some ponds restrict the
use of model boats. Always choose a launch site which is downwind
so that the wind and waves will drift the boat back to you if it should
ever flip over. Do not run the Blast in salt water.
Preparing to Run
The included NiMH charger
can only be used with Traxxas
NiMH batteries equipped with
the iD High-Current Connector
as shown.
Please examine your connector to make sure that it is the proper
connector. All batteries equipped with legacy Traxxas High-Current
Connectors are not compatible with the included NiMH charger. DO
NOT try to force legacy Traxxas High-Current Connectors, or any
other type of connector, into the charger connector. DO NOT attempt
to charge any batteries with the included NiMH charger if you are
unsure of the battery type, the connector type, or if the original
connector on the battery has been changed.
Charging your battery pack
Plug the charger into a wall outlet. Plug the battery into the charger.
Charge time is approximately 8 hours.
Solid Green LED
Solid Red LED
Solid Green LED
Installing Transmitter Batteries
The transmitter requires 4 AA alkaline or
rechargeable batteries (not included).
Opening the Hatch
The top hatch is held secure with
a rubber band. To open the top
hatch, pull it up and rotate it.
This will provide access to the
battery compartment and
on/off switch. For full access to the radio compartment, unhook the
rubber band from the top hatch.
Setting Up the Antenna
1. Slide the antenna wire
into the bottom of the
antenna tube until
the white tip of the
antenna is at the top
of the tube under the
black cap.
2. Insert the base of the
tube into the antenna Correct No
post. Take care not to
crimp the antenna wire.
3. To prevent loss of radio range, do not kink or cut the black wire, do
not bend or cut the metal tip, and do not bend or cut the white wire
at the end of the metal tip.
Installing the Battery Pack
The included battery installs in the bow (front) of the boat. Remove
the foam block and slide the battery pack into the battery tray. Slide
the foam block back into place to secure the battery. The Blast is not
designed to use 7-cell (8.4 volt) battery packs.
If you do not understand this warning, please contact Traxxas
Customer Support at 1-888-TRAXXAS (1-888-872-9927)* or
your local hobby dealer for more information.
*Toll-free support is available to U.S. residents only; outside the U.S., please call +1-972-549-3000.
Transmitter Controls
Centering your Servos
Whenever your radio system has been removed for service or cleaning,
the steering servo must be re-centered 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. Nothing connects to the other
terminals on the receiver.
Place fresh “AA” batteries in the transmitter and turn the power switch
on. Adjust trim to “0” 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.
The TQ 2.4GHz transmitter has a directional antenna. For
maximum range, hold the antenna upright and pointed in the
direction of the model. Pointing the transmitter away from the
model will reduce radio range.
Radio System Adjustment
Your radio system was pre-adjusted before it left the factory however,
the adjustment should be checked prior to running the Blast. These
instructions are for Traxxas radio systems only. If you installed your
own radio, refer to your radio system’s instructions.
• Always turn your transmitter on first and off last. This procedure will
help to prevent your Blast from receiving stray signals from another
transmitter, or other source, and running out of control.
• Turn the transmitter switch on. The status LED on the transmitter
should be solid green (not flashing).
• Turn on the receiver switch inside the boat. The steering servo
should jump and move to its idle (neutral) position. Keep fingers and
obstacles away from the propeller.
• Operate the steering control on the
transmitter. Check for rapid operation of
the steering servo and that none of the
steering mechanism is loose or binding. If
the servo operates slowly, check for weak
batteries. Adjust the “steering trim” control
on the transmitter to adjust the servo so
that the outdrive is pointing straight out
from the back of the boat. Also, check to
be sure that the outdrive does not turn
more in one direction than in the other. If you cannot align the
outdrive, refer to the section “Centering Your Servos.”
• Operate the throttle trigger on the transmitter to ensure that you
have full operation (propeller reaches full speed), and that the
propeller stops spinning when the throttle trigger is at neutral.
• Once adjustments are made, turn off the receiver on your Blast,
followed by the hand-held transmitter.
• The radio system should be range-tested before each session of
running. With the radio system on, have a friend carry the boat
away from you a distance equal to the maximum range you plan to
operate the Blast. At distance, once again test for complete radio
control. Never attempt to run the Blast if the radio appears to be
malfunctioning in any way.
Piloting the Blast
Your new Traxxas Blast is designed with water-resistant features to
protect the electronics in the model (receiver, servo, electronic speed
control). This gives you the freedom to have fun piloting your Blast.
Though highly water resistant, the Blast should not be treated as
though it is submersible or totally, 100% waterproof. Water resistance
applies only to the installed electronic components. Additional care
and maintenance is required when water contacts the mechanical
and electrical components to prevent corrosion of metal parts and
maintain their proper function. Before you go on, here are some
important precautions to keep in mind.
• Without proper care, some parts of your model can be seriously
damaged due to contact with water. Know that additional maintenance
procedures will be required after running in order to maintain the
performance of your model.
• Not all batteries can be used in wet environments. Consult your battery
manufacturer to see if their batteries can be used in wet conditions. Do
not use LiPo batteries in wet conditions. Note: The Nautica ESC is not
LiPo compatible.
• The Traxxas TQ 2.4GHz transmitter is not water resistant.
• Do not operate your model during a rain storm or other inclement
weather where lightning may be present.
• Do not allow your model to come in contact with salt water (ocean
water), brackish water (between fresh water and ocean water), or
other contaminated water. Salt water is highly conductive and highly
corrosive. Use caution if you plan to run your model near a beach.
• Select a body of water (at least 10 inches deep) that 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).
If the Blast is running at full throttle but is only barely moving forward,
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 is very sensitive to any changes
or modifications. If the propeller is damaged, it should be replaced.
Receiver Box: Maintaining a Watertight Seal
Before Running Your Blast
1. Consult the section “After Running Your Blast” before proceeding.
Make sure you understand the maintenance required.
2. Confirm that the receiver box O-ring and cover are installed correctly
and secure. Make sure the screws are tight and the blue O-ring is not
visibly protruding from the edge of the cover.
3. Confirm that your batteries can be used in wet conditions.
4. Normally, very little water will
a small
a small
accumulate inside the boat. Empty
any standing water from the boat
between runs. Drill a small hole 1/16”
from 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).
5. Check the wiring for any frayed wires or loose connections.
6. Check the tightness of the set 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
7. Check the mounting of the receiver and servos.
8. Check the rubber driveshaft seal for cuts and tears. Do not attempt to
run the Blast if this seal is damaged.
9. Check the tightness of the propeller. Hold the u-joint and turn the
propeller clockwise until it’s fingertight. Visually inspect the propeller
for nicks, dings and warpage. Replace if damaged.
10. Check the operation of the radio system, especially the condition of
the batteries.
11. Visually inspect the hull for any cracks, damage or possible leaks.
12.Check for deterioration of the rubber band that holds the top hatch.
13. Before operating the Blast,
make certain the water pickup
(A) and the exit tube (B) are
clear of debris and are properly
connected. Otherwise, motor
overheating may occur.
Removing the Receiver
1. To remove the cover, remove the two 3x10mm button-head
cap screws.
2. To remove the receiver from the box, simply lift it out and set to
the side. The antenna wire is still inside the clamp area and cannot
be removed yet.
3. Remove the wire clamp by removing the two 2.5x8mm cap screws.
4. Unplug the servo and ESC cables from the receiver and remove the
After Running Your Blast
1. Spray all the bearings, drivetrain, and fasteners with WD-40® or
similar water displacing light oil.
2. Let the boat stand or blow it off with compressed air.
Removing the hatch and placing the boat in a warm sunny
spot will help with drying.
3. As a precautionary step, remove the sealed receiver box
cover. While unlikely, humidity or tiny amounts of moisture or
condensation may enter the receiver box during running. This
can cause long-term problems with the sensitive electronics in the
receiver. Removing the receiver box cover during storage allows
the air inside to dry. This step can improve the long-term reliability
of the receiver. It is not necessary to remove the receiver or unplug
any of the wires.
Removing and Installing Radio Gear
The unique design of the receiver box allows the removal and
installation of the receiver without losing the ability to maintain a
watertight seal in the box. The patented wire clamp feature gives you
the ability to also install aftermarket radio systems and maintain the
watertight features of the receiver box.
Receiver Installation
1. Always install the wires into the
receiver box before installing
the receiver.
2. Install the antenna wire and the servo
cables into the receiver box.
3. Arrange the wires neatly using the
wire guides in the receiver box. The
excess wire will be bundled inside
the receiver box. Label which wire is for
which channel.
4. Apply a small bead of silicone grease
(Traxxas part #1647) to the wire clamp.
5. Install the wire clamp and
tighten the two 2.5x8mm cap
screws securely.
6. Install the receiver into the
box and plug the wires into
the receiver.
7. Make sure the O-ring is properly
seated into the groove in the
receiver box so that the cover
will not pinch it or damage it in any way.
8. Install the cover and tighten the two 3x10mm button-head cap
screws securely.
9. Inspect the cover to make sure that the O-ring seal is not visible.
Tuning Adjustments
Adjusting the Trim Angle
The outdrive strut on the Blast will
allow you to adjust the trim angle
of the propeller. The trim angle
changes how high the bow of the
boat rides out of the water. Setting
the trim angle correctly will provide
the maximum speed and efficiency
from the Blast.
Loosen nut to
adjust trim.
As the outdrive is trimmed up, the bow (front) of the boat will ride
higher causing the boat to run slightly faster; however, it will be
more unstable in the wind. Do not trim the outdrive up on windy
days or when running in choppy water. If the trim is set to high, the
bow will bounce up and down (“porpoise”), and the propeller may
begin to cavitate. As the outdrive is trimmed down, the bow of the
boat is lowered, increasing the wetted surface of the boat. This will
slow the Blast slightly, but stability and control will be improved.
Experiment with this adjustment to find out what works best for your
particular conditions.
Adjusting the Outdrive Shaft End Play
There should be a slight amount
of shaft end play in the outdrive
housing. To adjust the end play,
loosen the set screw on the U-joint
yoke (see image). Pull the propeller
shaft until there is no more than
1mm of distance at “arrow 2” in the
drawing. Retighten the set screw.
Boat Retrieval
Arrow 2
If the Blast accidentally flips over and fills with water, it is equipped
with foam flotation to help prevent it from sinking. Traxxas does not
recommend ever trying to swim or wade to retrieve a boat. If you
have chosen your launch site carefully (downwind), the Blast will
probably drift back to you on its own.
If there is no wind, you will need a tennis ball and a length of string.
Tie the tennis ball securely to one end of the string; then, throw the
ball over the drifting boat. Pull the ball in and try to entangle the boat
in the string. Pull the boat back slowly to shore. If only the bow of the
boat remains visible, try using a fishing lure with many hooks and a
fishing pole. Try to snag the lip of the upper deck or drive mechanism
with the hooks.
• Keep the Blast clean of accumulated dirt and oil.
• Re-oil the motor bushings before each day of running. Use an oil
made for electric motors such as 3-in-1 Oil™.
• Periodically re-oil the bushing in the outdrive housing and the
driveshaft tube. The oil hole for the driveshaft tube is located
underneath the sealed receiver box.
Drain all water out of the Blast and thoroughly dry it before storage.
Store the Blast with the hatch cover removed so that any remaining
moisture can to evaporate.
Painting the Hull
If you wish to paint your hull some other color besides the factory
white, choose your paint with caution. Only use paint made for
plastic models (available from your hobby dealer). Test the paint on
an inconspicuous and non-critical area before painting the entire
boat. The paint on the bottom must be smooth to prevent a loss of
Battery iD
Your model’s included battery pack is equipped with Traxxas Battery
iD. This exclusive feature allows Traxxas battery chargers (sold
separately) to automatically recognize connected battery packs and
optimize the charge settings for the battery. This eliminates the need
to fumble with charger settings and menus for the easiest and safest
charging solution possible. Visit to learn more about this
feature and available Traxxas chargers and batteries.
MODEL 38104-5
TRAXXAS® brand logo
On White
Scalable, vector artwork.
Logo must not be modified
in any way
For repro below 2”
On Black or Dark Backgroun
For use after 9/1/2016
Discard all previous versions
For repro below 2”
WHITE, THICK BLACK BORDER w/Simplified Tagline
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