Section 08
ENGINE MANAGEMENT (4-TEC)
Subsection 02
(OVERVIEW)
SMR2003-026_08-02A.FM
08-02-3
MAGNETO SYSTEM AND
POWER SUPPLY
The magneto is the primary source of electrical
energy. It transforms magnetic field into electric
current (AC).
The magneto has a 3 phase-delta wound stator on
18 poles. Capacity is 380 watts.
It supplies DC current to battery after being trans-
formed by the voltage regulator/rectifier. Refer to
CHARGING SYSTEM.
The battery then supplies all the electrical system
with regulated 12 Vdc.
OPERATING PRINCIPLE OF
ENGINE MANAGEMENT
A highly advanced EMS has been used to ensure
a high power output with cleanest combustion.
The EMS calculates the proper air/fuel mixture and
ignition timing for each cylinder separately. The
fuel is injected into the intake port of each cylinder.
NOTE:
On the 1503, PTO and magneto (MAG) are
on the same engine side (rear). Each cylinder is
referenced as
1
,
2
and
3
instead of PTO, CENTRE
and MAG. The numbers are stamped on the valve
cover.
1. Cylinder 1
2. Cylinder 2
3. Cylinder 3
NOTE:
The EMS includes an ECU (electronic con-
trol unit), sensors, injectors, electromagnetic valves
and ignition system.
AIR INDUCTION
4-TEC Normally-Aspirated Models
Air for combustion is drawn directly at the front of
the engine through one 52 mm throttle body. The
air flow is controlled by a throttle plate and an idle
bypass valve. The air continues through the intake
manifold, which contains the flame arrester and
goes into the cylinder head.
52 mm THROTTLE BODY
1. Idle bypass valve
2. Throttle position sensor (TPS)
1
R1503motr218A
2
3
1
2
R1503motr216A
www.SeaDooManuals.net
Summary of Contents for 2003 GTI LE RFI
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Page 767: ...NOTE www SeaDooManuals net ...
Page 768: ...NOTE www SeaDooManuals net ...
Page 769: ...F00Z0D 2003 GTI MODEL WARNING www SeaDooManuals net ...
Page 770: ...F00Z0C 2003 GTI LE MODEL WARNING www SeaDooManuals net ...
Page 771: ...F00Z0E 2003 GTI LE RFI MODEL WARNING www SeaDooManuals net ...
Page 772: ...F00Z0J 2003 RX DI MODEL WARNING www SeaDooManuals net ...
Page 773: ...F00Z0I 2003 GTX DI MODEL WARNING www SeaDooManuals net ...
Page 774: ...F00Z0K 2003 XP DI MODEL WARNING www SeaDooManuals net ...
Page 775: ...F00Z0F 2003 GTX 4 TEC MODEL WARNING www SeaDooManuals net ...
Page 776: ...F00Z0G 2003 GTX 4 TEC MODEL WITH AUXILIARY DESS MODULE WARNING www SeaDooManuals net ...
Page 777: ...F00Z0B 2003 GTX 4 TEC AND GTX 4 TEC SUPERCHARGED MODELS WARNING www SeaDooManuals net ...
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