11
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.
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
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
content (page 2)
5. Incorrect oil content in the fuel
..............Switch to a recommended brand
of fuel (page 2)
6. Poor quality fuel
............................................Switch to a recommended brand
of fuel (page 2)
7. Engine not primed
........................................Prime engine (page 7)
8. EZ-Start battery not charged
...................Use a freshly-charged battery
(page 6)
9. EZ-Start ground wire (yellow) faulty
....Clean, tighten, or replace ground
wire
10. EZ-Start motor wire loose
.........................Check motor connections on the
EZ-Start motor
11. One-way starter bearing slipping
..........Remove EZ-Start/ Clean or replace
bearing (page 13)
12. EZ-Start gears damaged
............................Listen for excessive gear noise/
Replace gears/motor
13. Glow plug wire loose from glow plug
..Crimp the connector on the glow
plug wire
14. Glow plug wire damaged
..........................Replace or repair glow plug wire
15. leaking glow plug gasket
.........................Check glow plug gasket/ tighten
glow plug
16. Glow plug fouled or weak
.........................Check for two solid green lights
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)
17. Engine flooded
...............................................Clear the engine of excess fuel
(page 11)
18. Engine overheated
.......................................Allow engine to cool - find cause
for overheating
19. Exhaust blocked
............................................Clear any obstructions
20. air cleaner plugged
......................................Clean and replace air cleaner
element (page 6)
21. Carburetor incorrectly adjusted
.............Readjust carburetor to factory
break-in settings (page 6)
22. High-speed fuel mixture is too rich
......Lean the high-speed mixture
(page 8)
23. High-speed fuel mixture is too lean
.....Richen the high-speed mixture
(page 8)
24. Idle speed set too low
.................................Increase idle speed (page 8)
25. Fuel flow blocked
..........................................Check that all fuel lines are clear
with no pin-hole leaks. Check for
dirt blockage in the carburetor
fuel inlet and high-speed needle
seat/ Install inline fuel filter
26. air bubble in the fuel line
..........................Prime the engine to force the air
through/ Check for pinhole leaks
in the fuel line
27. Insufficient fuel tank pressure
.................Replace the pressure hose
(between pipe and fuel tank)/
Clear blockage in the tuned pipe
hose fitting/ Check flow to and
from tank/ Check fuel tank cap
seal
28. Engine overheated
.......................................Allow engine to cool/ Find cause
for overheating
29. Engine over-geared for application
......Use a lower gear ratio (page 9)
30. Engine clutch slipping
................................Replace clutch shoes (see engine
repair section, page 14)
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
(windshield)
34. Excessive load on the engine
...................Check for bound drivetrain
35. Broken clutch shoe spring
........................Replace clutch shoe spring
(page 14)
36. loose flywheel
................................................Replace flywheel nut (page 14)
37. EZ-Start motor pinion stripped
...............Replace EZ-Start motor
ENGINE TROUBLESHOOTING GUIDE
Engine will not start
1
3
7
25
8
16
13
14
21
26
19
35
36
32
EZ-Start
®
motor will not turn
8
10
17
EZ-Start
®
turns but engine does not
11
12
37
Engine starts and then stalls
16
21
24
26
25
27
32
Engine sluggish, poor performance
3
6
16
15
21
22
20
30
29
38
31
32
Engine overheats
3
4
5
6
21
23
25
26
33
34
31
Engine chokes/hesitates at speed
1
2
16
21
23
25
26
27
20
28
Engine stalls under hard acceleration
1
2
16
21
24
25
26
Engine stalls around turns
1
2
27
Engine stalls during normal driving
1
2
3
16
25
26
27
21
20
32
