Section 08
ELECTRICAL SYSTEM
Subsection 03
(IGNITION SYSTEM)
08-03-2
LMR2000_066_08_03A.FM
Both coils are located inside the electrical box.
TYPICAL
1. Ignition coil PTO
2. Ignition coil MAG
3. Starter cable
4. Positive battery cable
5. Solenoid
6. Fuse
Multi-Purpose Electronic Module
(MPEM)
The MPEM is directly powered by the battery. It
has a micro-processor inside of its sealed case.
The MPEM is responsible of the following electri-
cal functions:
– interpreting information
– distributing information
– start/stop function
– timer
– Digitally Encoded Security System
– ignition timing curve
– engine rev limiter.
Some fuses are directly mounted onto the MPEM.
All the electrical system is controlled by the MPEM.
It has internal micro-processor and is directly pow-
ered by the battery.
The MPEM features a permanent memory that
will keep the programmed safety lanyard(s) active
and other vehicle information, even when the bat-
tery is removed from craft.
947 engine has a digital Direct Current-Capacitor
Discharge Ignition (DC-CDI) system within the
MPEM which receives the input from the trigger
coil and signals the ignition coil when to fire.
Compared to the magneto system, the DC-CDI
system offers a more powerful and stable ignition
at low RPM.
Electrical Box
The high amperage/voltage components are locat-
ed into the electrical box.
The electrical box is located in the engine compart-
ment.
TYPICAL
1. Electrical box
IGNITION TIMING
Before checking ignition timing with a stroboscop-
ic timing light (dynamic test), it is mandatory to
scribe a timing mark on the PTO flywheel (static
test) corresponding to the specific engine.
Also, the timing mark scribed on the PTO flywheel
can be used to troubleshoot a broken magneto
woodruff key.
NOTE:
Do not use the factory mark found on the
PTO flywheel to check ignition timing or trouble-
shoot any problems.
CAUTION:
The relation between the PTO fly-
wheel mark position and crankshaft position may
change as the PTO flywheel might tighten/loosen
on the crankshaft. As an example, when the en-
gine is accelerated out of water, PTO flywheel
may tighten then loosen when the engine is de-
celerated. This will result in a false ignition tim-
ing reading. Always verify PTO flywheel mark
position before checking ignition timing with
an appropriate timing light. If mark does not
align with tool, repeat static test to ensure fly-
wheel has not loosen before changing the igni-
tion timing.
3
5
F06H37A
1
2
4
6
F07H07B
1
Summary of Contents for Sea-Doo SPORTSTER LE
Page 1: ...219 100 097...
Page 122: ......
