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2003-2004 Polaris MSX110/ MSX150 Personal Watercraft Service Manual
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msx 110
msx 150
Four Stroke Personal Watercraft Service Manual

Hull and Body Systems
Specifications / Components / Teardown and Rebuilding / Inspection
General Information
Model Information / Safety Warnings / General Information
Maintenance
Periodic Maintenance Tables / Maintenance Procedures
Propulsion System
Specifications / Components / Teardown and Rebuilding / Inspection
Engine Removal and Installation
Specifications / Removal and Installation
Engine Disassembly, Inspection and Re--Assembly
Specifications / Components / Testing / Troubleshooting / Teardown
Fuel / Ignition / Exhaust Systems
Specifications / Components / Testing / Troubleshooting
1
2
3
4
5
6
7
8
Electrical System
Specifications / NGI Gauge / System Interface Box / Starter Motor / Components
Table of Contents

1
MSX 110 / 150 Service Manual General Information
PWC Identification Numbers 1.1
2004 PWC Publication Part Numbers 1.2
Service Guidelines / Safety Warnings 1.3
MSX 110 General Information 1.4 -- 1.5
MSX 150 General information 1.6 -- 1.7
Standard Torque Specifications 1.8
Decimal Equivalent Chart 1.9
Conversion Chart 1.10
Tap Drill Sizes 1.11
Service Tools 1.12 -- 1.13

P L E
1 2 3 4 5 6 7 8 9 10 11 12
Universal
Manufacture
I.D.
Sequential Serial Numbers
(Alphanumeric)
Certification
Month
Certification
Year
Model
Decade
Model
Year
HIN (Boarding Platform)
HIN (Inside Engine Compartment)
HIN (Boarding Platform)
HIN (Inside Engine Compartment)
EMISSIONS DECAL
ENGINE SERIAL NUMBER DECAL
GENERAL INFORMATION
1.3 2004 Four Stroke PWC Service Manual
2004 PWC Identification Numbers
The engine I.D. number and hull I.D. number are used to register the watercraft. They are unique numbers that
distinguish each watercraft from others of the same model.
If the watercraft is ever stolen these numbers will help identify it. The owner should keep a record of these num-
bers in a place other than the watercraft.
Month Code: A = January; B = February; etc.
Year Of Manufacture: 4 = 2004

GENERAL INFORMATION
1.4 2004 Four Stroke PWC Service Manual
2004 PWC Publication Part Numbers
Model Model Number
Owner’s
Manual
Parts Book Microfiche
Assembly
Instructions
MSX 110 (A) W045304CA
MSX 110 (A)
International
W045304IA
MSX 110 (B) W045304CB
MSX 110 (B)
International
W045304IB
9919055 9919056
MSX 110 (C) W045304CC
MSX 110 (C)
International
W045304IC
MSX 150 (A) W045305CA
MSX 150 (A)
International
W045305IA
9918972 9919173
MSX 150 (B) W045305CB
MSX 150 (B)
International
W045305IB
9919057 9919058
MSX 150 (C) W045305CC
9919057 9919058
MSX 150
International
W045305IC
MSX 150 (D) W045305CD
MSX 150 (D)
International
W045305ID
S C = 50 State Domestic (CARB Exemption).
S A / B / C / D = Color Option.
S I = International Model
2004 PWC Service Manual Part Numbers
Book Part Number
2004 Carbureted / DIt Models (All) 9919061
2004 Four Stroke PWC Models (All) 9919062
2004 OCTANE Update Packet 9919065
2004 PWC Flat Rate Manual 9919063
2004 Wallchart Packet TBA

GENERAL INFORMATION
1.5 2004 Four Stroke PWC Service Manual
Service Guidelines -- Safety Warnings
S Clean inside and outside of watercraft prior to servicing. Clean all parts before installing. Always use a service apron to
prevent damage to footwell and top--deck fiberglass.
S Watch for sharp edges which can cause personal injury. Protect hands and arms when working with sharp components.
S Always use a soft--faced hammer and extreme care when removing difficult or stuck components.
S Some fasteners are installed with locking agents or lubricants. Use of impact drivers will aid in fastener removal.
S Always follow torques specifications located throughout manual. Fasteners secured with either too little or too much torque
may fail and cause severe property damage, injury or death.
S Always follow torque sequence patterns when found in this manual. Tighten each fastener evenly and to the specified torque
value, and with specified locking agent.
S Always use new gaskets, o--rings and seals, clips, cir--clips, and snap rings when assembling components.
S Never re--use Nyloktor Flex Lockt nuts when assembling components.
S Never re--use Oetikert clamps when removed from fuel lines. Replace with small gear clamps.
S Always use Polaris--authorized lubricants, greases, and locking agents when assembling components. Failure to do so
may cause severe engine or vehicle damage.
S Always disconnect the black (--) negative cable first from the battery when removing the battery. When installing the battery,
attach the red (+) positive cable first, then the black (--) negative cable.
S Wear appropriate clothing, eye protection, and rubber gloves when working with batteries. Battery acid contains sulfuric
acid and is extremely poisonous. Serious burns can result when in contact with skin, clothing, eyes or internal body compo-
nents.
S If battery acid is ingested, drink large quantities of water or milk. Follow with milk of magnesia, beaten egg or vegetable
oil. Call a physician immediately.
S Flush eyes for15 minutes with water and seek prompt medical attention if acid comes in contact with eyes. Thoroughly wash
affected external body parts that come in contact with battery acid with water.
S Keep hands, arms, legs, feet and hair away from rotating parts, hot engine and exhaust components, drive pump and impel-
ler and engine induction when engine is running.
S Never attempt engine or driveline inspections and/or repairs without first removing lanyard and battery cables.
S Gasoline is highly flammable and explosive under certain conditions. Always exercise extreme care when handling gaso-
line. Do not smoke or allow open flames in or near the area where refueling is performed or where gasoline is stored.
S Always refuel the watercraft outdoors and in a well--ventilated area. Do not fill the tank to the fuel cap.
S If you get gasoline or oil on your skin or clothing, wash it off immediately with soap and water and change clothing.
S The engine exhaust from this product contains chemicals known to cause cancer, birth defects or other reproductive harm.
Only run engine outdoors or in a well--ventilated area.
S Never run the engine for more than 15 seconds without cooling water supply.

2004 MSX 110
W045304CA / CB / CC (W045304IA / IB / IC)
Length: 126 in. (320 cm) ....
Width: 48.3 in. (122.6 cm) .....
Height: 42.5 in. (108 cm) ....
Dry Weight: 650lbs. (295 kg)
Category: Midsize ..
Riders: 1 to 3 ....
Fuel Capacity: 17.8 US Gal. (67.4L)
Emission Certification: Two Star -- Very LowEmission
MSX 110 W045304CB Sarasota Yellow
GENERAL INFORMATION
1.6 2004 Four Stroke PWC Service Manual
2004 MSX 110 Emission Certification
The engines in all 2004 MSX 110 Personal Watercraft are certified as Two Star, Very Low Emission engines.
The Two Star label identifies engines that meet the California Air Resources Board (CARB) 2004 exhaust emis-
sion standards. Engines meeting these standards have 20% lower emissions than One--Star -- Low Emission
engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines.
Emission Control Information Decals
The emission control information decal is located on the flywheel cover.
2004 MSX 110 Emission Decal
ENGINE FAMILY 3WEBMO.75H01
FAMILY EMISSION LIMIT 36.0 g/kW--hr
EMISSION CONTROL SYSTEM SFI (Sequential Fuel Injection)
FUEL Unleaded Gasoline 91 Octane R+M/2
SPARK PLUG Champion RC7PYCB
SPARK PLUG GAP .7 -- .8mm (.028 -- .032in.)
ADVERTISED HORSEPOWER 82 kW (110HP)
ENGINE DISPLACEMENT 750cc

GENERAL INFORMATION
1.7 2004 Four Stroke PWC Service Manual
2004 MSX 110
Model Number
W045304CA / CB / CC (W045304IA / IB / IC)
Engine
Platform Polaris Libertyt Marine Intercooled Turbocharged Four Stroke
Engine Model Number ES075WLE--011
Engine Displacement 750cc
Number of Cylinders 2
Cylinder Lining Material Nicasil
Bore & Stroke (mm) 85 x 66
Compression Ratio (Effective) 9.0:1
Cylinder Compression @ Sea Level 140 ± 14.5 psi (9.6 ± 1 bar) -- Both spark plugs removed, engine turnover @ 300 RPM.
Cooling System Closed loop with engine coolant--to--freshwater heat exchanger.
Thermostat Opening Temperature 82_C
Overheat Warning Engine Overheat / Exhaust Manifold Overheat Switch -- RPM Limit / NGI Warning
Induction Type Intercooled Turbocharger
Lubrication Dry Sump
Oil Requirements Polaris Synthetic PWC Four Stroke Engine Oil (15W--50)
RPM Limiter 7800 to 8400 RPM -- Determined by ECU
Exhaust System Exhaust pipe w/water jacket and water injector.
Sound Reduction Turbo PLANETt
Engine Management System
Fuel Delivery Bosch Multi--Point Fuel Injection
Recommended Fuel Premium Unleaded Fuel (91 / 92 / 93 Octane)
Idle Speed (In Water) 1550 ± 50 RPM
Ignition System EMS Bosch ME 7.4.4
Timing Degrees BTDC 22 Degrees BTDC
Spark Plug Champion RC7PYCB
Spark Plug Gap .6 -- .7mm (.025 -- .030in.)
Electrical
Magneto Generator Output 25A / 350W @ 3000 RPM
Battery 12 Volts / 19A
Fuses 2A -- NGI Gauge/ 15A -- Battery / 15A -- IgnitionSystem/ 15A -- FuelPump
30A -- Alternator / 15A x 3 -- MainRelay
Starting Electric Motor -- One Button Start / One Button Stop
Propulsion
Jet Pump Type Dominator 2 Single Stage Axial Flow w/Six Vane Stainless Steel Stator
Impeller Rotation Counter Clockwise (From Aft)
Coupling Type Three piece coupler
Minimum Depth For Operation 2 ft. (60cm.)
Impeller Type TBA
Impeller Diameter 5.8 in. (148mm)
Reverse System Manual w/3400 RPM Limit
Hull / Body
Hull Design Modified Full V
Hull Material FRC (Fiberglass Reinforced Composite)
Top Deck Material FRC (Fiberglass Reinforced Composite)

MSX 150 W045305CD Stealth Black
2004 MSX 150
W045305CA / CB / CC / CD (W045305IA / IB / IC / ID)
Length: 126 in. (320 cm) ....
Width: 48.3 in. (122.6 cm) .....
Height: 42.5 in. (108 cm) ....
Dry Weight: 660 lbs. (301 kg)
Category: Midsize ..
Riders: 1 to 3 ....
Fuel Capacity: 17.8 US Gal. (67.4L)
Emission Certification: Two Star -- Very Low Emission
GENERAL INFORMATION
1.8 2004 Four Stroke PWC Service Manual
2004 MSX 150 Emission Certification
The engines in all 2004 MSX 150 Personal Watercraft are certified as Two Star, Very Low Emission engines.
The Two Star label identifies engines that meet the California Air Resources Board (CARB) 2004 exhaust emis-
sion standards. Engines meeting these standards have 20% lower emissions than One--Star -- Low Emission
engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines.
Emission Control Information Decals
The emission control information decal is located on the flywheel cover.
2004 MSX 150 Emission Decal
ENGINE FAMILY 3WEBMO.75H01
FAMILY EMISSION LIMIT 36.0 g/kW--hr
EMISSION CONTROL SYSTEM SFI (Sequential Fuel Injection)
FUEL Unleaded Gasoline 91 Octane R+M/2
SPARK PLUG Champion RC7PYCB
SPARK PLUG GAP .7 -- .8mm (.028 -- .032in.)
ADVERTISED HORSEPOWER 112 kW (150HP)
ENGINE DISPLACEMENT 750cc

GENERAL INFORMATION
1.9 2004 Four Stroke PWC Service Manual
2004 MSX 150
Model Number
W045305CA / CB / CC / CD (W045305IA / IB / IC / ID)
Engine
Platform Polaris Libertyt Marine Intercooled Turbocharged Four Stroke
Engine Model Number ES075WLE--011
Engine Displacement 750cc
Number of Cylinders 2
Cylinder Lining Material Nicasil
Bore & Stroke (mm) 85 x 66
Compression Ratio (Effective) 9.0:1
Cylinder Compression 140 ± 14.5 psi (9.6 ± 1 bar) -- Both spark plugs removed, engine turnover @ 300 RPM.
Cooling System Closed loop with engine coolant--to--freshwater heat exchanger.
Thermostat Opening Temperature 82_C
Overheat Warning Engine Overheat / Exhaust Manifold Overheat Switch -- RPM Limit / NGI Warning
Induction Type Intercooled Turbocharger
Lubrication Dry Sump
Oil Requirements Polaris Synthetic PWC Four Stroke Engine Oil (15W--50)
RPM Limiter 7800 to 8400 RPM -- Determined by ECU.
Exhaust System Exhaust pipe w/water jacket and water injector.
Sound Reduction Turbo PLANETt
Engine Management System
Fuel Delivery Bosch Multi--Point Fuel Injection
Recommended Fuel Premium Unleaded Fuel (91 / 92 / 93 Octane)
Idle Speed (In Water) 1550 ± 50 RPM
Ignition System EMS Bosch ME 7.4.4
Timing Degrees BTDC 22 Degrees BTDC
Spark Plug Champion RC7PYCB
Spark Plug Gap .6 -- .7mm (.025 -- .030in.)
Electrical
Magneto Generator Output 25A / 350W @ 3000 RPM
Battery 12 Volts / 19A
Fuses 2A -- NGI Gauge/ 15A -- Battery / 15A -- IgnitionSystem/ 15A -- FuelPump
30A -- Alternator / 15A x 3 -- MainRelay
Starting Electric Motor -- One Button Start / One Button Stop
Propulsion
Jet Pump Type Dominator 2 Single Stage Axial Flow w/Six Vane Stainless Steel Stator
Impeller Rotation Counter Clockwise (From Aft)
Coupling Type Three piece coupler
Minimum Depth For Operation 2 ft. (60cm.)
Impeller Type 12 -- 18 3 Blade
Impeller Diameter 5.8 in. (148mm)
Reverse System Manual w/3400 RPM Limit
Hull / Body
Hull Design Modified Full V
Hull Material FRC (Fiberglass Reinforced Composite)
Top Deck Material FRC (Fiberglass Reinforced Composite)
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What's Included?

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$26.99
This manual offers comprehensive maintenance and repair guidance for the 2003-2004 Polaris MSX110 and MSX150 personal watercraft, catering to both professional mechanics and DIY enthusiasts. It encompasses:
- Step-by-step procedures for engine service, covering removal, disassembly, inspection, and assembly.
- Troubleshooting and diagnostics for engine, electrical, and fuel systems.
- Detailed wiring diagrams.
- Elaborate illustrations and exploded views.
- Specifications and special tools.
- Safety information and maintenance schedule.
It serves as an indispensable resource for individuals undertaking the repair or upkeep of their 2003-2004 Polaris MSX110 and MSX150 personal watercraft. The manual is user-friendly and encompasses all the necessary information to ensure precise and efficient task completion.
This manual is available for instant download via a provided link and is exclusively obtainable through online purchase.