User Manual

LIMITED WARRANTY INFORMATION
Every effort has been made in component design and material
selection to make your Nitro Sport as durable as possible. Because
the model is intended to be a hobby-class model and operate at a
much higher level of performance than a “toy,” no warranties can
be expressed or implied relating to the longevity of the parts. Parts
will wear out and require replacement. If any part of the model
appears to be defective, or incorrectly assembled when it is new
(before it is used), it will be repaired or replaced at Traxxas’ discretion.
This warranty will not cover damage from wear, abuse, neglect, crash-
es, or water.
The radio system that is provided with the ready-to-run models
is covered by separate warranty on a separate page (included in
your documentation package). The radio system warranty does not
cover water damage. Due to the special nature of the TRX .15
engine, it is also covered by a separate warranty page provided with
your model.
Traxxas corporation reserves the right to make changes, modi-
fications, and improvements to this product without notification,
and which may not be reflected in these documents. Upgrades and
improvements are not necessarily retroactive.Traxxas may not pro-
vide improved or updated components free of charge for models
built prior to any change in specification.
• TO OBTAIN WARRANTY SERVICE
If it has been determined that your model is somehow defective,
return it to Traxxas with a note describing the problem, and a copy
of the purchase receipt or invoice. Do not return to Traxxas without
first speaking with a service technician, toll-free, at 1-888-
TRAXXAS. Drain all fuel and remove all batteries. Remember that
the warranty only covers brand new products which are defective
right out of the box. All other service or exceptions will be estimated
on an individual basis.
Be sure to include a return address and a daytime phone number.
MAIL OR SHIP TO:
TRAXXAS CORPORATION
12150 SHILOH ROAD
DALLAS, TEXAS 75228
For technical assistance regarding your model,
call (888) TRAXXAS (872-9927),
[phone] (outside of the U.S.A.),
or E-Mail Traxxas at [e-mail]
For orders and other information,
call [phone] or fax [phone].
ENGINE TROUBLE SHOOTING
The troubleshooting guide on the following page has been pro-
vided to help you in diagnosing and repairing common engine
problems. Most difficulties with engines can be traced back to
problems with adjustment, fuel quality, dirt blockage, or common
parts that wear with everyday use.
FLOODED ENGINE
The engine can become flooded if it is primed too many times
during the course of a routine start up. When the engine is flooded,
the EZ-Starter cannot turn the engine and it will appear to be
locked. Use the following procedure to clear a flooded engine.
• Remove the blue glow plug wire
• Remove the glow plug with a 5/16 nut driver
• Plug in the EZ Start and turn the truck upside down
• Push the EZ-Start button for several seconds to clear the
excess fuel from the combustion chamber
• Turn the truck over and re-install the glow plug with gasket
• Reconnect the blue glow plug wire
• Remove one of the motor wires from the EZ-Start motor
• Push the EZ-Start button for several seconds. This lights the
glow plug and burns off any remaining fuel
• Reconnect the EZ-Start motor
• Do not prime the engine. Partially open the throttle and press
the EZ-Start button. The engine should start immediately.
GLOW PLUGS
The glow plug in your engine is a consumable item which
must be replaced periodically to maintain peak performance and
starting ease. To test for a leaking glow plug, place a few drops
of fuel around the the base of the glow plug when the engine is
cool. With the engine running, look for bubbles around the glow
plug. If the gasket is leaking, tighten the plug or replace the gas-
ket.
The EZ-Start control box has an LED which lights to indicate
the condition of the glow plug. If the LED does not light when the
button is pressed, then the glow plug element is broken.
However, glow plug performance can deteriorate significantly
before the element actually burns in two. The only sure way to
test for a faulty glow plug is to replace it with a new one to
see if the problem goes away. You can view the glow plug
element by removing it and touching it against the engine head
while pressing the EZ-Start button. The glow plug will not light
unless it is grounded against the engine. Glow plugs can be
damaged by particles in the combustion chamber or by running
the fuel mixture excessively lean.
Traxxas makes 2 glow plugs. The standard hot plug
(part#3230) is the stock replacement plug for Traxxas engines.
The optional heavy-duty plug (part#3231) will last longer in most
cases however, it is a medium temperature plug so performance
may be reduced slightly. Do not use plugs with idle bars!
CARBURETOR
Dirt is the main enemy to your carburetor. If you notice a sud-
den change in the fuel mixture (lean) and performance of your
model, you may have dirt lodged in the carburetor. To dislodge a
dirt particle in your carburetor try screwing the high speed needle
all the way in and then back out to its original settings. If the
engine doesn’t return to normal operation, then try backing the
mixture screw out and prime the engine to force fuel through the
carburetor. Return the mixture screw back to its original settings.
The engine will be flooded at this point so follow the directions
for relieving a flooded engine. If this fails, then the carburetor will
need to be removed and cleaned with Traxxas Nitro Wash or
denatured alcohol. Do not blow on carburetor passages or fuel
lines with your mouth. Fuel and solvents are extremely poiso-
nous. To prevent this from occurring again, insert a fuel filter in
the line between the tank and the carburetor.
EZ-START
The battery to the EZ-Start must be fully charged for the best
performance. If the battery is weak, the EZ-Start may appear to
be spinning the engine fast enough to start however, there is not
enough current to adequately light the glow plug. If the EZ-Start
appears to spin normally, but doesn’t seem to “catch” and spin
the engine adequately, then inspect the one way bearing inside
the starter. If it becomes saturated with castor oil from the engine
fuel, then it will slip on the starter shaft. Clean or replace the one
way bearing. If there is excessive gear noise, then suspect broken
gears inside the EZ-Starter. If the EZ-Start motor spins freely
with no gear noise, then the motor pinion gear may be stripped. If
this occurs, then the EZ-Start motor assembly must be replaced.
The pinion gear is pressed on, and not available separately.
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Contact Traxxas for assistance: 1-888-TRAXXAS. 972-613-3300 (outside USA). E-Mail us at [e-mail]