Troubleshooting 19 - Husqvarna TC 250 2021 Owner's Manual

Faults
Engine turns but does not start
Engine has no idle speed
Engine does not speed up
Engine has too little power
Possible cause
Operating error
The motorcycle has been in
disuse for an extended period
and old fuel is in the float
chamber
Fuel feed interrupted
Spark plug oily or wet
Plug gap of spark plug too
wide
Fault in ignition system
Short-circuit cable in wiring
harness frayed, switch-off but-
ton faulty
The connector or ignition coil
is loose or oxidized
Water in carburetor or jets
blocked
Idling jet blocked
Adjusting screws on carbure-
tor distorted
Spark plug defective
Ignition system defective
Carburetor running over
because float needle dirty or
worn
Loose carburetor jets
Fault in ignition system
Fuel feed interrupted
Air filter very dirty
Exhaust system leaky,
deformed or too little glass
fiber yarn filling in main
silencer
Fault in ignition system

TROUBLESHOOTING 19

Action
–
Carry out start procedure. (
–
Empty the carburetor float cham-
ber. ( p. 106)
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor compo-
nents.
–
Clean and dry the spark plug, or
change it if necessary.
–
Adjust plug gap.
Guideline
Spark plug electrode gap
0.60 mm (0.0236 in)
–
Check the ignition system.
–
Check the switch-off button.
–
Clean the connector and treat it with
contact spray.
–
Check/set the carburetor compo-
nents.
–
Check/set the carburetor compo-
nents.
–
Carburetor - adjust the idle speed.
( p. 105)
–
Change the spark plug.
–
Check the ignition coil.
–
Check the spark plug connector.
–
Check/set the carburetor compo-
nents.
–
Check/set the carburetor compo-
nents.
–
Check the ignition system.
–
Check the fuel tank breather.
–
Clean the fuel tap.
–
Check/set the carburetor compo-
nents.
–
Clean the air filter and air filter box.
( p. 60)
–
Check exhaust system for damage.
–
Change the glass fiber yarn filling of
the main silencer. ( p. 62)
–
Check the ignition system.
p. 27)
117