Axial Racing AX0320 - Manual

Your Axial engine is warranted to be free from defects in materials and workmanship for a period of two (2) years
from date of purchase. If there are any defects with the materials, workmanship, or assembly of your engine, Axial
will gladly repair or replace it for you at our discretion. Engines that have been worn out, abused, or improperly
operated will not be covered under this warranty.
Not covered by Warranty:
This warranty does not cover problems from normal wear, abuse, neglect, or any damage arising as a result of
improper use, use of improper fuel, overheating, continuous neglect, or crash damage.
Axial shall not be liable for any loss or damages, whether direct, indirect, special, incidental, or consequential,
arising from the use, misuse, or abuse of this product and any accessory or chemical to operate this product.
Servicing:
Any repairs made to engines resulting from neglect or misuse will be charged parts and labor before the work is
started. Please contact customer service at Axial for any warranty claims at 949-600-8642. Our customer service
hours are Monday through Friday 8:00am to 5:00pm, Pacific Standard Time.
If an engine needs to be sent in, customer service will issue a RMA#. All engine returns require a RMA#.
The engine must be returned complete with crankcase, crankshaft, piston, sleeve, connecting rod, cylinder head,
carburetor, and pull starter. You should not return the clutch, flywheel, flywheel collet, nut, air cleaner, manifold,
or muffler.
Please contact Axial customer service if you have any issues with your engine.
Axial
21092 Bake Parkway Suite 114
Lake Forest, CA 92630
Warranty
Engine Features
Factory Carburetor Settings
Engine Break In
Spec 2s Nitro Engines
AX0320-I001
Heat Sink
Exhaust Outlet
Pull Start
Crankshaft
* *NOTE** Some features and parts may differ depending on which model engine you have.
Low Speed Needle
Idle Adjustment Screw
High Speed Needle
Flush
Flush with Groove
Reducer
High Speed
Needle
Fuel Inlet
Idle Adjustment
Throttle
Linkage
Low Speed
Needle
Crankcase
Carburetor
Tuning After Break In
About 1mm (0.04”)
Do not adjust your carburetor. The needles are preset from
the factory for engine break in.
The needles are designed to sit flush, this makes it easy to reset
them to the factory break in settings. If your engine is already
broken in, this setting may be too rich for your engine. If engine is
over heating from stock setting please adjust both needles 1 full turn
out and continue break in process
Use of wrong fuel will void the
Minimum of 10% oil.
engine warranty.
The piston and cylinder sleeves are designed to achieve proper running tolerances when they are
properly broken in. New engines need a break-in period of about 6-8 tanks before they can be run at full
throttle. Be sure to follow all the steps in the break in process or the engine will suffer damage.
20-30% Nitro
Important
Stop Tuning
Carb Reducer
Tip - Stopping the motor
1) Use a Rag
Use a rag to cover the exhaust tip. This will stop the motor. Be
careful! The exhaust is extremely hot so be sure to use a thick
rag.
2) Pinch the Fuel Line
In extreme cases or emergencies you can pinch the fuel line to
stop the flow of fuel to the carb. Be careful, this can make the
motor run lean which can damage the motor. It is best to stop
the motor using a rag.
Turn the high speed needle in 1/8 turn increments to lean out the
fuel mixture for increased top speed and throttle performance.
Drive the car to notice the changes in speed and throttle responses.
Continue tuning the carburetor in this way, turning in 1/8 turn
increments only. (Maximum of 2 1/2 turn from flush)
Rich Fuel Mixture
A slightly rich fuel mixture
delivers a cooler running
temperature
and more
lubrication, but with slightly less
power and longer engine life.
Lean Fuel Mixture
Provides stronger combustion
and power, but if you lean out
too much the result is more
engine heat and a shorter
engine life. Symptoms of an
engine that are too lean are
sputtering, rough idle, no smoke
from the exhaust and hard to
restart.
Read this section carefully. Failure to follow
these tuning steps could result in damage to
your engine and void your engine warranty!
Important
Fill the fuel tank and prime the carburetor 1
Adjust the carburetor and start the engine 2
The vehicle should not move when idling. If it
does, adjust the trim settings on the transmitter.
Drive the vehicle in a 20 foot oval, do not apply
more than 1/2 throttle. Coast for short amounts
of time to allow the engine to cool, then accelerate
again.
Continue this process for a total of three tanks
of fuel.
Drive at 1/2 throttle for 3 tanks 3
High Speed Needle
The idle speed is set after the engine is up to operating speed. To
properly set the idle speed turn on your radio and set the throttle
trim to neutral. Turn the idle adjustment screw counter clockwise to
reduce the idle speed, or clockwise to increase the idle speed. The
idle should be set high enough to keep the engine running, but low
enough to prevent the clutch from engaging.
Idle Adjustmen Screw
Tuning Tips
We recommend that you do not touch the low speed needle. If
adjustment is needed, the low speed needle is set after the high
speed needle is adjusted. If the low speed needle is set too lean you
will experience the following:
1. Flame out at part throttle
2. Overheating
If you experience any of the above, reset to factory settings and start
the tuning process over.
Low Speed Adjustmen Screw
if your engine shows any of the following signs,
please stop your engine and retune to a richer
setting. Further running will damage the engine.
1. There is no white smoke when at full throttle
2. The engine hesitates or bogs
3. Reduced top speeds or loss of power
4. Temperatures above 275° F (135° C)
More Fuel = RICH
Less Fuel = LEAN
While a lean motor will have higher performance, it will lead to
premature engine wear and failure. Use the following information to
tune your engine to your driving conditions. Remember, a slightly rich
setting is a safer setting.
2 carburetor reducers are included with
your engine ( 8mm yellow; 8.5mm orange)
these are used for restricting airflow. The
bigger the insert the more power. The
smaller the reducer the lower the power.
Use these to tune your engine for your local
track conditions.
Make sure the receiver is switch is off. Manually
turn the throttle servo until the carburetor is 1/4
of the way open.
Attach the glow plug igniter to the engine. Start
the engine by pulling the starter cord (30cm
MAX!).
Adjust the throttle servo so the engine runs
fast enough to idle without engaging the
clutch or turning the wheels.
Run the engine for three tanks of gas. If the
motor shuts off repeat steps the steps.
Fill the fuel tank completely. Use only
20-30% nitro content fuel with a
minimum of 10% oil. Use a high quality
branded model car fuel only. To prime
the engine, use a piece of cloth to cover
the exhaust tip. Pull the starter cord
several times until the fuel reaches the
carburetor and no bubbles are seen.