Section 08
ELECTRICAL SYSTEM
Subsection 02
(IGNITION SYSTEM)
SMR2000-021_08_02A.FM
08-02-11
MPEM Programmer
NOTE:
For more information on the programmer,
refer to the MPEM programmer guide (P/N 219
700 090).
Through the MPEM programmer, the ignition tim-
ing can be advanced up to 3
°
or retarded up to 4
°
.
The MPEM programmer corrects the ignition tim-
ing in 1° increments.
CAUTION:
If the ignition timing is adjusted too
advanced, this will cause serious damage to the
engine.
The timing mark on the PTO flywheel refers to the
physical component position when the spark must
occurs. The MPEM must be synchronized with
the mark. For instance, on a particular engine, the
timing correction 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 cor-
rection for the tolerances of the mechanical com-
ponents.
Knowing that, you select with the programmer the
higher or lower number to advance or retard the
actual timing correction by referring to the follow-
ing chart.
Examples:
a. You found the flywheel mark advanced. You
must retard the ignition timing.
– The programmer gives you the number 3. Re-
ferring to the chart, number 3 returns a cor-
rection of 2
°
(advanced) and this is too much
in this case.
– You estimate the correction should be set to
1
°
(advanced) to align flywheel mark. Back in
the chart, look to find 1
°
(advanced). This
gives number 4. Enter this number with the
programmer.
– You recheck the timing with the timing light
and if the mark is aligned, ignition timing is
properly set.
b. You found the flywheel mark advanced. You
must retard the ignition timing.
– The programmer gives you the number 3. Re-
ferring to the chart, number 3 returns a cor-
rection of 2
°
(advanced) and this is too much
in this case.
– You estimate the correction should be set to
1
°
(advanced) to align flywheel mark. Back in
the chart, look to find 1
°
(advanced). This
gives number 4. Enter this number with the
programmer.
– You recheck the timing with the timing light
and found that the flywheel mark is still too
advanced. You know now that the correction
made previously was not enough and you es-
timate the correction should be set to - 2
°
(re-
tarded) to align flywheel mark. Back in the
chart, look to find - 2
°
(retarded). This gives
number 6. Enter this number with the pro-
grammer.
– You recheck the timing with the timing light
and if the mark is aligned, ignition timing is
properly set.
c. You found the flywheel mark retarded. You
must advance the ignition timing.
– The programmer gives you the number 4. Re-
ferring to the chart, number 4 returns a cor-
rection of 1
°
(advanced) and this is not
enough in this case.
– You estimate the correction should be set to
2
°
(advanced) to align flywheel mark. Back in
the chart, look to find 2
°
(advanced). This
gives number 3. Enter this number with the
programmer.
– You recheck the timing with the timing light
and if the mark is aligned, the ignition timing
is properly set.
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°
www.SeaDooManuals.net
Содержание 2001 GS
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