TR68 Operations Manual

18
3.6.2
Engine Troubleshooting
SYMPTOM
POSSIBLE CAUSES SOLUTION
Difficult to start, fuel is
available, but spark
plug
will not ignite. (Power
available at high
tension
code.)
Ignition plug not properly connected?
Check ignition system.
Carbon deposit at ignition? Clean or replace ignition.
Short
circuit
due
to
deficient
insulator?
Replace insulators.
Improper spark plug gap? Set spark plug gap to the correct gap.
Difficult to start, fuel is
available but spark plug
will not ignite.(Power
NOT available at high
tension code.)
Short circuit at stop switch?
Check stop switch circuit. Replace stop
switch if defective.
Ignition coil defective. Replace ignition coil.
Fuel is available and
spark plug ignites
(compression normal).
Muffler clogged with carbon
deposits?
Clean or replace muffler.
Mixed fuel quality is inadequate? Check fuel to oil mixture.
Fuel is inadequate (water, dust)?
Flush
fuel
system
and
replace
with
fresh
fuel.
Air filter
clogged?
Clean or replace air filter.
Fuel is available and
spark plug ignites
(compression normal).
Defective cylinder head gasket?
Tighten
cylinder
head
bolts
or
replace
head gasket.
Cylinder worn?
Replace cylinder.
Spark plug loose?
Tighten spark plug.
Operation not
satisfactory-
Not enough
power available
(compression normal,
no misfiring)
Air cleaner clogged?
Clean or replace air cleaner.
Air in fuel line?
Bleed (remove air) from fuel line.
Fuel level in carburetor float
chamber improper?
Adjust carburetor float.
Carbon deposit in cylinder?
Clean or replace cylinder.