Technical data

Section 08 ELECTRICAL SYSTEM
Sub-Section 02 (IGNITION SYSTEM)
08-02-5
7. Scribe a thin mark on PTO flywheel in the mid-
dle of tool slot (587 and 717 engines) or aligned
with timing mark pointer tool (787 engine).
TYPICAL
1. Tool slot
2. Flywheel mark
NOTE : This mark becomes the reference
when using the stroboscopic timing light.
CAUTION : The static test cannot be used
as a timing procedure, therefore, always
check the timing with a stroboscopic timing
light.
8. Remove TDC gauge.
9. Reinstall spark plug and connect wire.
Dynamic Test
587 and 717 Engines
To check ignition timing, use Bombardier timing
light (P / N 295 000 078).
NOTE : To perform this procedure, make
sure to use a stroboscopic timing light rated
up to 6000 RPM. Otherwise, an inaccurate read-
ing will be obtained.
The ignition components are affected by temper-
ature variation, therefore, timing must be checked
when engine is cold, after idling for a MAXIMUM
of 20 seconds.
1. Connect timing light pick-up to MAG side spark
plug wire.
2. Connect an induction-type tachometer (P / N
295 000 100) to spark plug wire.
ENGINE IGNITION TIMING (BTDC)
587 2.41 mm (.095 in)
717 2.59 mm (.102 in)
787 3.38 mm (.133 in)
F01H5SB
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