Section 10
ELECTRICAL SYSTEM
Subsection 02
(IGNITION SYSTEM)
10-02-12
SMR2002-038_10_02A.FM
1. Retarded timing
In this case, turn armature plate counterclockwise
when facing it.
After adjustment, tighten armature plate retaining
screws.
CAUTION:
Armature plate screws must have Loc-
tite 243 (blue) applied before tightening. Make
sure armature plate screws are well secured.
Reinstall removed parts. Refer to MAGNETO SYS-
TEM.
Recheck ignition timing (make sure engine is cold).
Repeat armature plate positioning procedure if
timing mark position is not adequate.
787 RFI and 947 Engines
To correct the ignition timing, the data of the MPEM
is changed using the MPEM programmer (P/N 529
035 718) or the VCK (Vehicle Communication Kit)
(P/N 529 035 676).
NOTE:
For more information on the programmer,
refer to the MPEM programmer guide (P/N 219
700 138).
MPEM Programmer
787 RFI Engines
To verify ignition timing on this engine,
Fixed Tim-
ing
function must be activated first. This function
allows to check ignition timing at
any RPM
be-
cause it locks ignition timing at 12 degrees BTDC .
NOTE: Fixed Timing
function must be activated
before starting engine.
Fixed Timing Function
1. Connect the communication cable to the MPEM
programmer and the other end to the safety lan-
yard switch on the craft.
2. Press the
ON/C
button on programmer and
enter your password.
3. Press
3
to choose
Vehicle info
in programmer.
4. Press
8
to choose
Bosch system
.
5. Press
1
to choose
Diagnosis
.
6. Press
4
to choose
Adjustment
.
7. Press
4
to choose
Fixed timing
.
8. The programmer display
Timing = 12.00 deg
.
9. Press any key to continue. Programmer will go
back one level to
Adjustment
.
10. Press
Menu
to go back one level to
Diagnosis
.
11. Press
Menu
to go back one level to
Bosch sys-
tem
.
12. Programmer now ask
Quit Bosch Diagnosis?
Choose
yes
to quit.
Press
2
to choose
Start Vehicle, the program-
mer will then ask
Modify Max RPM
, press menu
then start engine with start/stop button.
NOTE:
If engine fail to start and as soon engine
stops revving (start/stop button has been released),
Fixed Timing
function is disabled. To reactivate func-
tion, repeat complete procedure.
Timing Verification
With engine running, check timing.
CAUTION:
If engine is to be run more than a few
seconds, engine must be cooled using the flush
kit.
If timing is correct stop engine. This will automat-
ically disable
Fixed Timing
function.
If further adjustment is required refer to following
procedure.
Timing Adjustment
Unlike the other models, the ignition timing correc-
tion can be made from 4.5° (advanced) to - 2.25° (re-
tarded).
The MPEM programmer will display correction
numbers from 1 to 8. Refer to the next timing cor-
rection chart.
F01H5VA
1
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