Knowledge sharing about using Ignition Timing Analyser and theoretically approaching of engine firing degree which can happen cause of the effect of wrong ignition timing.

1. Ignition Timing Checking on Gas Engine
by
Using EELT500 Snapon Ignition
Analyzer Tool
BY
PHYOE MAUNG MAUNG(NEON)
MECHANICAL SKILLED TECHNICIAN

2. What is ignition timing
Ignition Timing is simply the time, usually before
the piston reaches top dead center in degrees
Advance timing degree is the number of degrees
before top dead center (BTDC) that the spark will
ignite the air-fuel mixture in the combustion
chamber during the compression stroke.
Retarded timing can be defined as changing the
timing so that fuel ignition happens later than
the manufacturer's specified time.
= Ignition Time

3. G-8920 ignition degree on the Engine plate
(26 Degree before TDC)
1 Stoke is 180.
26
180
26

4. 1. Analyzer Gun with monitor panel
2. Battery connector clips ( black &
red)
3. Magnetic Probe
Snap on EELT500 (Ignition Timing Light
Analyzer)

5. Connect 12V Battery (red terminal to +)
Check the battery condition by seeing
three led ( red-low battery, orange –
normal, green-full level)
Fill the data “Check Ignition Timing”
Ignition: Conv.
Engine Size: 8 (for ZOC Gas Gen) & 6
(for ZMS Gas Gen)
Step-1 Prepare

6. Connect the magnetic Probe to
No.8 Cylinder cable in running
engine
(It will appear flashing light and
RPM)
Step-2 Connect Probe

7. Fill the data to ADV- degree
(Advanced Early Combustion
Degree)
(26 Degree for ZOC Gas Gen)
(28 Degree for ZMS Gas Gen)
And RPM will show in Panel
light
The Ignition Gun Sparking light
will appear
Step-3 Fill ADV degree and check

8. Point the light to the flywheel
hole and it will see the “ TDC
B1-8” means that ignition
timing is working properly.
Step-4 Pointing the Light
TDC-B1-8

9. Affect to Engine rating ( reduce in Power efficiency)
Increase detonation as the ignition timing is
advanced as the spark plug ignites the fuel father
away from TDC in compression stroke. The risk of
excessive exhaust temperature increases as ignition
timing is retarded
Backfiring
Incomplete Combustion (too late ignite)
Excessive Exhaust temperature
High Noise
High vibration
Hard Starting (too much early ignite)
Effect of incorrect ignition timing

10. Thanks You