Engine Troubleshooting Guide - Traxxas Nitro Sport Operating Instructions Manual

ENGINE TROUBLESHOOTING GUIDE

Engine will not start
EZ-Start motor will not turn
®
EZ-Start turns but engine does not
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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 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 6)
8 EZ-Start battery not charged . ................................. Use a freshly-charged battery (page 5)
9 EZ-Start ground wire (yellow) faulty . ................... Clean, tighten, or replace ground wire (page 12)
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 12)
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
17 Engine flooded ............................................................ Clear the engine of excess fuel (page 10)
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 5)
21 Carburetor incorrectly adjusted ............................ Readjust carburetor to factory break-in settings (page 5)
22 High-speed fuel mixture is too rich...................... Lean the high-speed mixture (page 7)
23 High-speed fuel mixture is too lean .................... Richen the high-speed mixture (page 7)
24 Idle speed set too low . .............................................. Increase idle speed (page 7)
25 Fuel flow blocked . ....................................................... Check that all fuel lines are clear with no pin-hole leaks.
26 Air bubble in the fuel line . ....................................... Prime the engine to force the air through/ Check for pinhole
27 Insufficient fuel tank pressure . ............................... Replace the pressure hose (between pipe and fuel tank)/ Clear
28 Engine overheated . .................................................... Allow engine to cool/ Find cause for overheating
29 Engine over geared for application ..................... Use a lower gear ratio (page 8)
30 Engine clutch slipping .............................................. Replace clutch shoes (see engine repair section, page 13)
31 Drive system is bound . .............................................. Locate the bound item and repair
32 Engine excessively worn .......................................... Repair or replace engine (page 12)
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 13)
36 Loose flywheel ............................................................. Replace flywheel nut (page 13)
37 EZ-Start motor pinion stripped ............................. Replace EZ-Start motor
1 3 7 25 8 16
8 10 17
11 12 37
16 21 24 26 25
3 6 16 15 21
3 4 5 6 21
1 2 16 21 23 25
1 2 16 21
1 2 27
1 2 3 16 25 26
pressed/ No glow plug light indicates a faulty plug/ Replace with
Traxxas 3232 or 3232X glow plugs (page 10)
Check for dirt blockage in the carburetor fuel inlet and
high-speed needle seat/ Install inline fuel filter
leaks in the fuel line
blockage in the tuned pipe hose fitting/ Check flow to and from
tank/ Check fuel tank cap seal
13 14 21 26 19 35
27 32
22 20 30 29
23 25 26 33 34 31
26 27 20 28
24 25 26
27 21 20 32
36 32
38 31 32
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