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ENGINE TROUBLESHOOTING GUIDE
Engine will not start
EZ-Start
®
motor will not turn
EZ-Start
turns but engine does not
®
Engine starts and then stalls
Engine sluggish, poor performance
Engine overheats
Engine chokes/hesitates at speed
Engine stalls under hard acceleration
Engine stalls around turns
Engine stalls during normal driving
1. Out of fuel.........................................................Fill fuel tank
2. Fuel level is low ..............................................Refill fuel tank
3. Improper or contaminated fuel ..............Replace fuel
4. Excessive nitro in the fuel ..........................Use fuel with a lower nitro
5. Incorrect oil content in the fuel ..............Switch to a recommended brand
6. Poor quality fuel ............................................Switch to a recommended brand
7. Engine not primed ........................................Prime engine (page 7)
8. EZ-Start battery not charged ...................Use a freshly-charged battery
9. EZ-Start ground wire (yellow) faulty ....Clean, tighten, or replace ground
10. EZ-Start motor wire loose .........................Check motor connections on the
11. One-way starter bearing slipping ..........Remove EZ-Start/ Clean or replace
12. EZ-Start gears damaged ............................Listen for excessive gear noise/
13. Glow plug wire loose from glow plug ..Crimp the connector on the glow
14. Glow plug wire damaged ..........................Replace or repair glow plug wire
15. leaking glow plug gasket .........................Check glow plug gasket/ tighten
16. Glow plug fouled or weak .........................Check for two solid green lights
17. Engine flooded ...............................................Clear the engine of excess fuel
18. Engine overheated .......................................Allow engine to cool - find cause
19. Exhaust blocked ............................................Clear any obstructions
20. air cleaner plugged ......................................Clean and replace air cleaner
The troubleshooting guide above has been provided 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-Start
cannot turn the engine and it will appear to be locked. Use
®
the following procedure to clear a flooded engine.
1. Remove the blue glow plug wire.
2. Remove the glow plug with the glow plug wrench supplied with
your model. A 8mm (5/16") nut driver will also work.
3. Plug in the EZ-Start and turn the truck upside down.
4. Push the EZ-Start button for several seconds to clear the excess
fuel from the combustion chamber.
5. Turn the truck over and re-install the glow plug with gasket
6. Reconnect the blue glow plug wire.
7. Remove one of the motor wires from the EZ-Start motor.
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6
3
4
1
2
1
2
1
2
1
2
content (page 2)
of fuel (page 2)
of fuel (page 2)
(page 6)
wire
EZ-Start motor
bearing (page 13)
Replace gears/motor
plug wire
glow plug
when the EZ-Start button is
pressed/ No glow plug light
indicates a faulty plug/ Replace
with a Traxxas part #3230, #3232,
or #3232X glow plug (page 11)
(page 11)
for overheating
element (page 6)
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8
16
13
14
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25
27
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15
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6
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3
16
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27
21
21. Carburetor incorrectly adjusted .............Readjust carburetor to factory
22. High-speed fuel mixture is too rich ......Lean the high-speed mixture
23. High-speed fuel mixture is too lean .....Richen the high-speed mixture
24. Idle speed set too low .................................Increase idle speed (page 8)
25. Fuel flow blocked ..........................................Check that all fuel lines are clear
26. air bubble in the fuel line ..........................Prime the engine to force the air
27. Insufficient fuel tank pressure .................Replace the pressure hose
28. Engine overheated .......................................Allow engine to cool/ Find cause
29. Engine over-geared for application ......Use a lower gear ratio (page 9)
30. Engine clutch slipping ................................Replace clutch shoes (see engine
31. Drive system is bound ................................Locate the bound item and repair
32. Engine excessively worn ............................Repair or replace engine (page 13)
33. Cooling air to the head is blocked .........Cut ventilation holes in the body
34. Excessive load on the engine...................Check for bound drivetrain
35. Broken clutch shoe spring ........................Replace clutch shoe spring
36. loose flywheel ................................................Replace flywheel nut (page 14)
37. EZ-Start motor pinion stripped ...............Replace EZ-Start motor
8. Push the EZ-Start button for several seconds. This lights the glow
plug and burns off any remaining fuel.
9. Reconnect the EZ-Start motor.
10. 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 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 gasket.
If the "Glow Plug" LED fails to light, the glow plug may be bad
or 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
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26
20
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break-in settings (page 6)
(page 8)
(page 8)
with no pin-hole leaks. Check for
dirt blockage in the carburetor
fuel inlet and high-speed needle
seat/ Install inline fuel filter
through/ Check for pinhole leaks
in the fuel line
(between pipe and fuel tank)/
Clear blockage in the tuned pipe
hose fitting/ Check flow to and
from tank/ Check fuel tank cap
seal
for overheating
repair section, page 14)
(windshield)
(page 14)
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