Section 07 ELECTRICAL SYSTEM
Sub-Section 02 (IGNITION SYSTEM)
07-02-6
7. Scribe a thin mark on PTO flywheel in the mid-
dle of tool slot (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.
8. Remove TDC gauge.
9. Reinstall spark plug and connect wire.
Dynamic Test
To check ignition timing, use Bombardier timing
light (P/N 529 031 900).
717 Engines
NOTE:
To perform this procedure, make sure to
use a stroboscopic timing light rated up to 6000
RPM. Otherwise, an inaccurate reading will be ob-
tained.
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 an induction-type tachometer (P/N
295 000 100) to spark plug wire.
1. Tachometer pick-up
2. Connect timing light pick-up to MAG side spark
plug wire.
ENGINE
IGNITION TIMING
(BTDC)
717D/717 2.59 mm (.102 in)
787 3.38 mm (.133 in)
-
CAUTION
The static test cannot be used as a timing
procedure, therefore, always check the tim-
ing with a stroboscopic timing light.
F01H5SB
1
2
A00B4FA
F00H0GA
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