Sea-doo 1997 GSI, Shop Manual

Page: 163 / 372

Section 07 ELECTRICAL SYSTEM
Sub-Section 02 (IGNITION SYSTEM)
07-02-9
1. Too advanced timing
In this case, turn armature plate clockwise when
facing it.
Example 2
When PTO flywheel mark is on left side of timing
tool slot, it indicates retarded timing.
1. Retarded timing
In this case, turn armature plate counterclockwise
when facing it.
After adjustment, tighten armature plate retaining
screws.
Reinstall removed parts. Refer to ENGINE 03-04.
Recheck ignition timing (make sure engine is
cold).
Repeat armature plate positioning procedure if
timing mark position is not adequate.
787 Engine
To correct the ignition timing, the data of the
MPEM is changed using the MPEM programmer
(P/N 295 000 127).
NOTE: For more information on the programmer,
refer to its guide.
Through the MPEM programmer, the ignition tim-
ing can be advanced up to 3
°
or retarded up to 4
°
.
The timing mark refer to the physical component
position when the spark must occur. The MPEM
must be synchronized with the mark. For in-
stance, on a particular engine, the timing correc-
tion may need to be advanced to 2
°
so that the
mark aligns with timing mark pointer tool. This is
not the real spark advance, just a correction for
the tolerances of the mechanical components.
Knowing that, you select with the programmer
the higher or lower number to advance or retard
the actual timing correction by referring to the fol-
lowing chart.
-
CAUTION
Armature plate screws must have Loctite
242 (blue) applied before tightening. Make
sure armature plate screws are well secured.
F01H5UA
1
F01H5VA
1
-
CAUTION
If the ignition timing is adjusted too ad-
vanced, this will cause serious damage to
the engine.
TIMING CORRECTION CHART
Programmer number
(MPEM)
Ignition Timing
Correction
2 3°
3 2°
4 1°
1 0
5 -1°
6 -2°
7 -3°
8 -4°
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