GxT V083-01, Ferret 83 Self-Powered Advance Timing Light - Manual (Page 6)

Timing-Advance Test Procedure - Digital T/L
This light measures advance by delaying the fl ash so that it appears
to align the crank shaft TDC mark to its pointer, and then displaying
the degrees delayed.
1. Press the ON/Off button to turn the timing light on. Hold the Mode
button for 2 seconds to select 2 or 4 stroke operation. Place the
Inductive Pick up around the #1 spark plug wire.
2. Prepare the engine for timing tests, such as: warming-up, disabling
electric and vacuum control lines, and cleaning the wheel timing
marks. Then run the engine. The light should begin fl ashing.
3. Press the RPM/ADV Button to toggle between RPM and
Advance.
4. Point the light beam onto the degree marks at the engine damper
wheel or fl ywheel, and move the mark to the TDC position using
the Tim ing Advance Control Buttons found on the handle, and read
the timing advance on the display. NOTE: Align your eye squarely
with the timing marks when to avoid parallax error.
5. Compare the measurement with the specifi cation. Adjustments are
made by turning the distributor slightly or by moving the ignition
timing sen sor.
6. Restore all engine parts to their normal arrangement.
RPM/Adv
Button
4S/2S
Button
On/Off
Button
Press the On/Off button to turn the timing light on or off. Press the 4S/2S
button to toggle between 2 stroke and 4 stroke operation. Press the
RPM/Adv button to toggle between reading RPM and Advance. The
buttons that change the advance readings are located on the timing
light handle.