SeaDoo GTX 4-TEC Supercharged User Manual

Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 01 (OVERVIEW)
2
1
R1503motr267A
1. Supercharger
2. Throttle body
4-TEC Supercharged Intercooled Engine
Air for combustion is drawn at the back of the en-
gine by a mechanical driven supercharger. The
compressed air flows through one 52 mm throt-
tle body and is controlled by a throttle plate and
an idle bypass valve. The air continues through
the intake manifold, which contains the water/air
intercooler (which cools down the intake air) and
goes into the cylinder head.
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R1503motr332A
3 2
1. Supercharger
2. Intercooler
3. Throttle body
FUEL DELIVERY SYSTEM
BASIC OPERATION
When the intake valve reaches the correct posi-
tion, the ECM (Engine Control Module) opens the
fuel injector and fuel is discharged into the intake
port at the air intake manifold by the high fuel pres-
sure inside the fuel rail. The air/fuel mixture enters
then the combustion chamber through the open
intake valve. This mixture is then ignited by the
spark plug.
Intake Manifold
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R1503motr214B
23
4
5
6
7
INTAKE MANIFOLD (4-TEC)
1. Engine Control Module (ECM)
2. Fuel rail
3. Injector
4. Throttle body
5. Ignition coil
6. Manifold air pressure sensor (MAPS)
7. Manifold air temperature sensor (MATS)
394 smr2004-Complete Line Up
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SeaDoo GTX 4-TEC Supercharged Specifications

General

Seating Capacity	3
Model	GTX 4-TEC Supercharged
Displacement	1494 cc
Manufacturer	Sea-Doo
Category	Personal Watercraft
Fuel Type	Unleaded gasoline