66
XT8XT8E
MAINTENANCE
• Never modify the engine or muffler.
• Confirm the position of needle and idling before running. Be sure to run a new engine
smoothly.
• Make sure the air filter is clean and oiled.
• Never run your engine without an air filter. Your engine can be seriously damaged if dirt
and debris get inside the engine.
• For proper engine break-in, please refer to the manual that came with the engine.
• The engine may not start or run properly if the air filter is dirty, or choked with sand and
dust.
• If the fuel pipe is choked or deteriorates, the engine may not start, and there is danger
that fuel will leak out.
1. Make sure the transmitter and receiver batteries are fully charged.
2.
Make sure that your transmitter and receiver are both on the same frequency. If you have
a transmitter with multiple model memory, make sure you have selected the proper profile
for your car.
3. Put the car on the starter box and keep the tires from touching the ground.
4. Turn on the transmitter.
5. Turn on the receiver in the car.
6. Make sure the steering servo and engine servos work normally and adjust them correctly.
7. Put fuel in the fuel tank, and close the cap securely.
8. Apply the glow igniter to the engine glowplug.
9. Push the model car onto the starter box to start the engine. (If the engine is new, follow
the instruction manual and be sure to break in the new engine properly).
10. When the engine has started, remove the glow igniter.
11. Follow your engine break-in procedure and tune the engine as appropriate.
STARTING AND RUNNING THE ENGINE
Be sure to observe the following starting process. Failure to do so may cause the model car to start suddenly, which may lead to damage or unexpected accidents.
STOPPING THE ENGINE
Before you stop the engine, try to make sure the engine is at idle first. There are several ways to stop the engine:
•
Use a rag to cover the exhaust tip. Be careful! The exhaust is extremely hot so use a thick rag
and gloves.
• Pinch the fuel tubing to stop the flow of fuel to the carb. Be careful, this can make the
motor run lean which can damage the motor.
• Put your hand over the air filter, or squeeze the air filter element to block the airflow.
• Press an object (such as a screwdriver handle or shoe) against the rotating flywheel to
stop its rotation. Be very careful, and do not stick your hand or fingers near the rotating
flywheel.
FINISHING OPERATIONS
1. Stop the engine.
2. Turn off the receiver in the car
3. Turn off the transmitter.
MAINTENANCE AFTER RUNNING
Take proper care of your car after running to keep it performing well, and take notice of any damage and wear.
1. Do not leave fuel in the tank.
2. Go outside to drain any residual fuel from the exhaust pipe.
3. Clean the car and remove all sand, mud, and other debris.
4. Use after-run oil in your engine after you have finished running for the day.
ENGINE OPERATION
PREPARING TO OPERATE THE ENGINE
PROBLEM CAUSE SOLUTION
ENGINE DOES NOT START
• Fuel tank is empty or carburetor is not primed
• Bad glowplug or dead glowdriver battery
• Fuel lines, fuel filter, air cleaner, or muffler is clogged
• Engine is flooded due to over-priming
• Carburetor is not adjusted properly
• Throttle servo linkage not adjusted properly
• Fill fuel tank with fuel and prime
• Replace glowplug or recharge/replace glowdriver battery
• Clean or replace clogged part(s)
• Remove glowplug, turn car over to discharge fuel from cylinder. Test glowplug and replace if defective
• Set idle and main/slow needle adjusting screw to standard starting position
• Move throttle servo to neutral position and re-adjust linkage(s)
ENGINE STARTS BUT
THEN STALLS
• Fuel tank is empty
• Fuel lines, fuel filter, air cleaner, or muffler is clogged
• Carburetor is not adjusted properly
• Engine has overheated
• Fill fuel tank with fuel
• Clean or replace clogged part(s)
• Re-adjust idle and main/slow needle adjusting screw
• Allow engine to thoroughly cool down and open main needle adjusting screw 30° turn richer (CCW)
BAD REACTION AND RESPONSE
FROM ENGINE
• Carburetor is not adjusted properly
• Fuel lines, fuel filter, air cleaner, or muffler is clogged
• Low fuel pressure from muffler
• Re-adjust main/slow needle adjusting screw
• Clean or replace clogged part(s)
• Properly install pressure line between muffler and fuel tank
CAR IS HARD TO CONTROL
• Weak transmitter and/or receiver batteries
• Low reception from radio antennas
• Servo linkages not adjusted properly
• Recharge or replace batteries
• Fully extend transmitter and receiver antennas
• Move servo to neutral then re-adjust linkage(s)
STEERING DOES NOT WORK
PROPERLY
• Weak transmitter and/or receiver batteries
• Bent linkages or driveshafts
• Loose steering components
• Drivetrain damage
• Recharge or replace batteries
• Check tightness of steering components and tighten if necessary
• Replace damaged parts
HANDLING PROBLEMS
• Shocks are not working properly
• Suspension is binding
• Improper tires
• Rebuild the shocks and replace worn or broken parts
• Make sure suspension moves freely. Replace worn or broken parts
• Use different tires
STEERING FEELS SLUGGISH
OR VAGUE
• Suspension is binding
• Damaged steering servo
• Make sure suspension moves freely, and replace worn or broken parts
• Check the steering servo for damage and wear, and replace/repair if necessary
THE CAR DOES NOT DRIVE
STRAIGHT
• Suspension is binding
• Steering trim is off-center
• Wheels are loose
• Damaged steering servo
• Make sure suspension moves freely, and replace worn or broken parts
• Adjust steering trim until car drives straight
• Check the make sure the wheel nuts are properly tightened
• Check the steering servo for damage and wear, and replace/repair if necessary
TROUBLESHOOTING
GUIDE
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