JBM 53474 Bedienungsanleitung Seite 6

• Make the following preparations at least:
Find the timing scale and the position of the
indicator. The timing scale and the indicator
are usually at the crank pulley, crankshaft vi-
bration damper (at the front of the engine)
or the flywheel (between the engine and the
transmission), etc. (see Fig). The timing scale
and the indicator should be clean and clear.
Apply chalk dust on them if necessary. All the
spark plugs work normally, the gap between
the electrodes is correct. Start the engine, run
to the normal working temperature. Shut down
the engine before connecting the timing light.
CONNECTING THE TIMING LIGHT
In order to ensure safety and reliable operation of the timing light, connect according to the following
steps:
WARNING: keep hand, timing light, connecting wire and the signal pickup
device away from the running parts and the high temperature surface of the
engine. No smoking.
1. Close the ignition switch. Never connect the timing light when
the engine is running or the ignition switch is turned on.
2. Clip the inductive signal pickup device to the high voltage
wire of cylinder 1.(See Fig ). Make sure that the signal pickup
device doesn't touch the discharge branch pipe or other parts
of the engine, as temperature on these parts can be very high
when the engine is running, which may damage the signal
pickup device.
3. Clamp the battery jar clip at the battery jar inside the vehicle.
The red clip connects the anode (+)
The black clip connects the cathode (-)
INSPECTION OF THE BASIC IGNITION TIMING
NOTE: For some systems, before checking or adjusting the ignition time ac-
cording to instructions, some special elements should be unplugged, jump
connected or grounded. If it's not done according to instructions, the chec-
ked or adjusted ignition time will not be correct.
1. Make sure that the timing light is correctly connected according to the above requirement.
2. Make sure the preparations of the engine have been made according to the above require-
ment.
3. Start the engine, run to the normal working temperature.
4. If needed, adjust the idle speed according to the factory's requirement.
5. Observe the relative position between the timing scale and
the indicator (see Fig 4): compare the displayed timing de-
grees with the specified value, if the timing degrees are
within the allowede(u rangsually ± 2 degrees), then, the
ignition timing is normal. If the degrees exceed the range,
it's likely that some parts need to be replaced or the timing
needs to be adjusted.
6. Loose the flash switch, turn off the flash light.
7. Turn off the ignition switch, take down the timing light.
NOTE: If the timing light doesn't work or works abnormally, please refer to
the "trouble-elimination"section of this manual, check the possible causes.
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