BRP Johnson 4HP, Руководство по обслуживанию, Страница: 45 / 185

3-3
IGNITION AND ELECTRICAL
IGNITION TROUBLESHOOTING
IGNITION TROUBLESHOOTING
Perform the following ignition system tests when the engine is hard to start in order to determine if the
cause is in the ignition or another system.
START
Check spark condition.
Check if the spark plug is in good condition
(See page 2-9)
Disconnect the engine stop switch lead
wire (Blue/Red).
Check the air gap between the CDI and
coil unit core and the flywheel.
[Air gap: 0.5 mm]
Check spark plug cap for any evidence of
high-tension leak.
Check the spark plug cap resistance.
(See page 3-4)
[Cap resistance: 7.5 – 12.5 k
Ω]
OK
OK
OK
OK
No or weak sparks
No or weak sparks
Sparks
Check ignition timing
by using timing light.
(Refer to
specifications)
Sparks
Not good
Out of Spec.
Not good
Out of Spec.
Replace the spark plug with new
one.
Check and/or replace the engine
stop switch. (See page 3-5)
Adjust the air gap. (See page
3-7)
Replace the spark plug cap.
Replace the
CDI and coil
unit
Not good
Check the ignition coil resistance.
(See page 3-4)
[Secondary: 8.2 – 12.4 k
Ω]
OK
OK
The cause will not be in the ignition
system.
Out of Spec.