Number 30
Printed in U.S.A. 90-863161
SEPTEMBER 2000
2000, Mercury Marine
496CID/8.1L GASOLINE ENGINE
SERVICE
MANUAL
90-863161 SEPTEMBER 2000 Page i
Notice
Throughout this publication, “Dangers”, “Warnings” and “Cautions” (accompanied by the In-
ternational HAZARD Symbol ) are used to alert the mechanic to special instructions con-
cerning a particular service or operation that may be hazardous if performed incorrectly or
carelessly. OBSERVE THEM CAREFULLY!
These “Safety Alerts” alone cannot eliminate the hazards that they signal. Strict compliance
to these special instructions when performing the service, plus “Common Sense” operation,
are major accident prevention measures.
DANGER
DANGER - Immediate hazards which WILL result in severe personal injury or death.
WARNING
WARNING - Hazards or unsafe practices which COULD result in severe personal in-
jury or death.
CAUTION
Hazards or unsafe practices which could result in minor personal injury or product
or property damage.
Notice to Users of This Manual
This service manual has been written and published by the Service Department of Mercury
Marine to aid our dealers’ mechanics and company service personnel when servicing the
products described herein.
It is assumed that these personnel are familiar with the servicing procedures of these prod-
ucts, or like or similar products manufactured and marketed by Mercury Marine, that they
have been trained in the recommended servicing procedures of these products which in-
cludes the use of mechanics’ common hand tools and the special Mercury Marine or recom-
mended tools from other suppliers.
We could not possibly know of and advise the service trade of all conceivable procedures
by which a service might be performed and of the possible hazards and/or results of each
method. We have not undertaken any such wide evaluation. Therefore, anyone who uses
a service procedure and/or tool, which is not recommended by the manufacturer, first must
completely satisfy himself that neither his nor the products safety will be endangered by the
service procedure selected.
All information, illustrations and specifications contained in this manual are based on the
latest product information available at the time of publication. As required, revisions to this
manual will be sent to all dealers contracted by us to sell and/or service these products.
It should be kept in mind, while working on the product, that the electrical system and ignition
system are capable of violent and damaging short circuits or severe electrical shocks. When
performing any work where electrical terminals could possibly be grounded or touched by
the mechanic, the battery cables should be disconnected at the battery.
Any time the intake or exhaust openings are exposed during service they should be covered
to protect against accidental entrance of foreign material which could enter the cylinders and
cause extensive internal damage when the engine is started.
Page ii 90-863161 SEPTEMBER 2000
It is important to note, during any maintenance procedure replacement fasteners must have
the same measurements and strength as those removed. Numbers on the heads of the met-
ric bolts and on the surfaces of metric nuts indicate their strength. American bolts use radial
lines for this purpose, while most American nuts do not have strength markings. Mis-
matched or incorrect fasteners can result in damage or malfunction, or possibly personal
injury. Therefore, fasteners removed should be saved for reuse in the same locations when-
ever possible. Where the fasteners are not satisfactory for re-use, care should be taken to
select a replacement that matches the original.
We reserve the right to make changes to this manual without prior notification.
Refer to dealer service bulletins for other pertinent information concerning the products de-
scribed in this manual.
Engine Mechanical Components
Many of the engine mechanical components are designed for marine applications. Unlike
automotive engines, marine engines are subjected to extended periods of heavy load
and wide-open-throttle operation and, therefore, require heavy-duty components. Special
marine engine parts have design and manufacturing specifications which are required to
provide long life and dependable performance. Marine engine parts also must be able to
resist the corrosive action of salt or brackish water that will rust or corrode standard automo-
tive parts within a short period of time.
Failure to use recommended Quicksilver service replacement parts can result in poor en-
gine performance and/or durability, rapid corrosion of parts subjected to salt water and
possibly complete failure of the engine.
Use of parts other than recommended service replacement parts, will void the warranty on
those parts which are damaged as a result of the use of other than recommended replace-
ment parts.
Replacement Parts
WARNING
Electrical, ignition and fuel system components on MerCruiser Engines and Stern
Drives are designed and manufactured to comply with U.S. Coast Guard Rules
and Regulations to minimize risks of fire or explosion.
Use of replacement electrical, ignition or fuel system components, which do not
comply to these rules and regulations, could result in a fire or explosion hazard and
should be avoided.
When servicing the electrical, ignition and fuel systems, it is extremely important
that all components are properly installed and tightened. If not, any electrical or ig-
nition component opening would permit sparks to ignite fuel vapors from fuel sys-
tem leaks, if they existed.
90-863161 SEPTEMBER 2000 Page iii
Models Covered in This Manual
Sterndrive (MCM) Model Serial Number
496 Mag HO 0M000000 & Up
496 Mag 0M000000 & Up
Inboard (MIE) Model Serial Number
8.1S HO 0M000000 & Up
8.1S Horizon 0M000000 & Up
Page iv 90-863161 SEPTEMBER 2000
THIS PAGE IS INTENTIONALLY BLANK
1
2
3
4
5
6
7
8
Important Information
Removal And Installation
Engine
Electrical System
Fuel System
Cooling System
Exhaust System
Drives
9
Power Steering
90-863161 SEPTEMBER 2000 Page v
Service Manual Outline
Section 1 - Important Information
A - General Information
B - Maintenance
C - Troubleshooting
Section 2 - Removal and Installation
A - MCM Models
B - MIE Models
Section 3 - Engine
A - 496 cid (8.1L)
Section 4 - Electrical System
A - Starting System
B - Ignition System
C - Charging System
Section 5 - Fuel System
A - Fuel Delivery System for Electronic Fuel Injection
B - Fuel Injection Disassembly and Reassembly
Section 6 - Cooling System
A - Closed Cooled Models
Section 7 - Exhaust System
A - Manifolds and Elbows
B - Collectors
Section 8 - Drives
A - Velvet Drive 5000 Series Transmission
B - Hurth Transmission
Section 9 - Power Steering
A - Pump
Page vi 90-863161 SEPTEMBER 2000
IMPORTANT INFORMATION
Section 1A - General Information
Introduction 1A-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use This Manual 1A-2 . . . . . . . . . . . . . . .
Page Numbering 1A-2 . . . . . . . . . . . . . . . . . . .
Engine Serial Number Locations 1A-3 . . . . . . . .
IMPORTANT INFORMATION
Section 1B - Maintenance
Lubricants / Sealants / Adhesives 1B-2 . . . . . . .
Maintenance Schedules 1B-2 . . . . . . . . . . . . . . . .
Maintenance Intervals 1B-2 . . . . . . . . . . . . . . .
Gas Inboard 1B-2 . . . . . . . . . . . . . . . . . . . . . . .
Gas Sterndrive 1B-4 . . . . . . . . . . . . . . . . . . . . .
Specifications 1B-7 . . . . . . . . . . . . . . . . . . . . . . . . .
MCM (Sterndrive) Models 1B-7 . . . . . . . . . . . .
MIE (Inboard) Models 1B-8 . . . . . . . . . . . . . . .
Firing Order 1B-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 1B-9 . . . . . . . . . . . . . . . . . . . . . . .
Engines 1B-9 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmissions 1B-9 . . . . . . . . . . . . . . . . . . . . . .
Sterndrive Units 1B-9 . . . . . . . . . . . . . . . . . . . .
Checking Engine Oil Level/Filling 1B-10 . . . .
Changing Crankcase Oil and Filter 1B-11 . . . . .
Changing Water Separating Fuel Filter 1B-12 . .
Removal 1B-12 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 1B-12 . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering System 1B-13 . . . . . . . . . . . . . . .
Checking Fluid Level 1B-13 . . . . . . . . . . . . . . .
Filling and Bleeding 1B-14 . . . . . . . . . . . . . . . .
Closed Cooling System 1B-15 . . . . . . . . . . . . . . .
Checking Coolant Level 1B-15 . . . . . . . . . . . .
Flushing System MCM (Sterndrive) 1B-16 . .
Flushing System MIE (Inboard) 1B-17 . . . . . .
Transmission Fluid 1B-18 . . . . . . . . . . . . . . . . . . .
Checking Fluid Level 1B-18 . . . . . . . . . . . . . . .
Lubrication 1B-20 . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Cable 1B-20 . . . . . . . . . . . . . . . . . . . . .
Shift Cable 1B-20 . . . . . . . . . . . . . . . . . . . . . . . .
Shift Cable and Transmission
Linkage 1B-21 . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Coupler / U-Joint Shaft
Splines 1B-21 . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Motor 1B-22 . . . . . . . . . . . . . . . . . . . . . .
Cleaning Flame Arrestor 1B-23 . . . . . . . . . . . . . .
Serpentine Drive Belt 1B-24 . . . . . . . . . . . . . . . . .
Component Location 1B-24 . . . . . . . . . . . . . . .
Inspection 1B-25 . . . . . . . . . . . . . . . . . . . . . . . .
Removal 1B-25 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 1B-25 . . . . . . . . . . . . . . . . . . . . . . . .
Cold Weather or Extended Storage 1B-27 . . . . .
Precautions 1B-27 . . . . . . . . . . . . . . . . . . . . . . .
Power Package Layup 1B-28 . . . . . . . . . . . . .
Draining 1B-30 . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommissioning 1B-34 . . . . . . . . . . . . . . . . . .
90-863161 SEPTEMBER 2000 Page vii
IMPORTANT INFORMATION
Section 1C - Troubleshooting
Precautions 1C-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Poor Boat Performance and/or Poor
Maneuverability 1C-3 . . . . . . . . . . . . . . . . . . . . . .
Improper Full Throttle Engine RPM 1C-4 . . . . . .
RPM Too High 1C-4 . . . . . . . . . . . . . . . . . . . . .
RPM Too Low 1C-4 . . . . . . . . . . . . . . . . . . . . . .
Engine Cranks Over But Will Not Start
Or Starts Hard 1C-5 . . . . . . . . . . . . . . . . . . . . . . . .
Important Information 1C-5 . . . . . . . . . . . . . . .
Fuel System Rich 1C-5 . . . . . . . . . . . . . . . . . . .
Fuel System Lean 1C-5 . . . . . . . . . . . . . . . . . .
Miscellaneous 1C-5 . . . . . . . . . . . . . . . . . . . . . .
Engine Will Not Crank Over 1C-6 . . . . . . . . . . . . .
Charging System Inoperative 1C-6 . . . . . . . . . . .
Noisy Alternator 1C-7 . . . . . . . . . . . . . . . . . . . . . . .
Instrumentation Malfunction 1C-7 . . . . . . . . . . . .
Radio Noise 1C-7 . . . . . . . . . . . . . . . . . . . . . . . . . .
Poor Fuel Economy 1C-8 . . . . . . . . . . . . . . . . . . .
Engine Runs Poorly at Idle 1C-8 . . . . . . . . . . . . .
Engine Runs Poorly At High RPM 1C-9 . . . . . . .
Engine Acceleration Is Poor 1C-9 . . . . . . . . . . . .
Troubleshooting with Vacuum Gauge 1C-10 . . .
Engine Noise 1C-10 . . . . . . . . . . . . . . . . . . . . . . . .
Important Information 1C-10 . . . . . . . . . . . . . .
Valve Cover Area 1C-11 . . . . . . . . . . . . . . . . . .
Cylinder Area 1C-11 . . . . . . . . . . . . . . . . . . . . .
Camshaft Area 1C-12 . . . . . . . . . . . . . . . . . . . .
Crankshaft Area 1C-13 . . . . . . . . . . . . . . . . . . .
Miscellaneous 1C-14 . . . . . . . . . . . . . . . . . . . . .
Oil Pressure 1C-15 . . . . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous 1C-15 . . . . . . . . . . . . . . . . . . . . .
Low Oil Pressure 1C-16 . . . . . . . . . . . . . . . . . .
High Oil Pressure 1C-16 . . . . . . . . . . . . . . . . . .
Excessive Oil Consumption 1C-17 . . . . . . . . . . . .
Water In Engine 1C-18 . . . . . . . . . . . . . . . . . . . . . .
Important Information 1C-18 . . . . . . . . . . . . . .
Water on Top of Pistons 1C-19 . . . . . . . . . . . .
Water in Crankcase Oil 1C-19 . . . . . . . . . . . . .
Engine Overheats 1C-20 . . . . . . . . . . . . . . . . . . . .
Mechanical 1C-20 . . . . . . . . . . . . . . . . . . . . . . .
Engine Overheats 1C-21 . . . . . . . . . . . . . . . . . . . .
Cooling System 1C-21 . . . . . . . . . . . . . . . . . . .
Insufficient Water Flow from Belt
Driven Seawater Pickup Pump 1C-22 . . . . . .
Power Steering 1C-23 . . . . . . . . . . . . . . . . . . . . . .
Poor, Erratic or No Assist 1C-23 . . . . . . . . . . .
Noisy Pump 1C-24 . . . . . . . . . . . . . . . . . . . . . . .
Fluid Leaks 1C-24 . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
Section 2A - MCM Models
Torque Specifications 2A-2 . . . . . . . . . . . . . . . . . .
Tools 2A-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 2A-2 . . . . . . .
Removal 2A-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2A-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Installation/Alignment 2A-5 . . . . . . . . .
Water Hose Connections 2A-10 . . . . . . . . . . .
Electrical Connections 2A-10 . . . . . . . . . . . . . .
Power Steering Connections 2A-13 . . . . . . . .
Fuel Supply Connections 2A-14 . . . . . . . . . . .
Throttle Cable Installation
and Adjustment 2A-15 . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
Section 2B - MIE Models
Torque Specifications 2B-2 . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 2B-2 . . . . . . .
Removal 2B-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Engine Alignment 2B-6 . . . . . . . . . . . . .
Final Engine Alignment 2B-8 . . . . . . . . . . . . . .
Engine Connections 2B-13 . . . . . . . . . . . . . . . . . .
Seawater Hose Connection 2B-13 . . . . . . . . .
Electrical Connections 2B-14 . . . . . . . . . . . . . .
Exhaust Hose Connection 2B-15 . . . . . . . . . .
Fuel Supply Connections 2B-15 . . . . . . . . . . .
Throttle Cable Installation And
Adjustment 2B-15 . . . . . . . . . . . . . . . . . . . . . . .
Shift Cable Installation And
Adjustment 2B-15 . . . . . . . . . . . . . . . . . . . . . . .
Page viii 90-863161 SEPTEMBER 2000
ENGINE
Section 3A - 496 CID (8.1L)
Torque Specifications 3A-3 . . . . . . . . . . . . . . . . . .
Tools 3A-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 3A-5 . . . . . . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 3A-6 . . . . . . .
Engine Specifications 3A-6 . . . . . . . . . . . . . . . . . .
General Information 3A-11 . . . . . . . . . . . . . . . . . .
Special Notice 3A-11 . . . . . . . . . . . . . . . . . . . . .
Engine Identification 3A-11 . . . . . . . . . . . . . . .
Cylinder Head Identification 3A-11 . . . . . . . . .
Rocker Arm Cover 3A-12 . . . . . . . . . . . . . . . . . . . .
Removal 3A-12 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-13 . . . . . . . . . . . . . . . . . . . . . . . .
Intake Manifold 3A-15 . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-15 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-16 . . . . . . . . . . . .
Installation 3A-16 . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Arm/Push Rod 3A-18 . . . . . . . . . . . . . . . .
Removal 3A-18 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-18 . . . . . . . . . . . .
Installation 3A-19 . . . . . . . . . . . . . . . . . . . . . . . .
Valve Adjustment 3A-19 . . . . . . . . . . . . . . . . . . . . .
Hydraulic Roller Valve Lifters 3A-20 . . . . . . . . . .
Locating Noisy Lifters 3A-21 . . . . . . . . . . . . . .
Removal 3A-22 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-23 . . . . . . . . . . . . . . . . . . . . . . . .
Valve Stem Oil Seal / Valve Spring 3A-24 . . . . .
Removal - Head Installed 3A-24 . . . . . . . . . . .
Valve Assembly (Exploded View) 3A-25 . . . .
Installation - Head Installed 3A-26 . . . . . . . . .
Cylinder Head 3A-27 . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-27 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 3A-28 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-29 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-29 . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Valve Conditioning 3A-31 . .
Disassembly 3A-31 . . . . . . . . . . . . . . . . . . . . . .
Cleaning 3A-31 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-32 . . . . . . . . . . . . . . . . . . . . . . . .
Valve Springs - Checking Tension 3A-33 . . . .
Valve Seat Repair 3A-34 . . . . . . . . . . . . . . . . .
Valve Grinding 3A-34 . . . . . . . . . . . . . . . . . . . .
Reassembly 3A-35 . . . . . . . . . . . . . . . . . . . . . .
Crankcase Oil Dipstick Specifications 3A-36 . . .
All Engines 3A-36 . . . . . . . . . . . . . . . . . . . . . . .
Oil Pan 3A-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-37 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-37 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-37 . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pump 3A-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-39 . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 3A-39 . . . . . . . . . . . . . . . . . . . . . .
Cleaning 3A-40 . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 3A-40 . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-40 . . . . . . . . . . . . . . . . . . . . . . . .
Water Circulating Pump 3A-41 . . . . . . . . . . . . . . .
Removal 3A-41 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-41 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-42 . . . . . . . . . . . . . . . . . . . . . . . .
Torsional Damper 3A-42 . . . . . . . . . . . . . . . . . . . .
Removal 3A-42 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-43 . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft Position Sensor 3A-44 . . . . . . . . . . . . .
Removal 3A-44 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-44 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-44 . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover / Oil Seal 3A-45 . . . . . . . . . . . . . . . . .
Oil Seal Replacement
(Without Removing Front Cover) 3A-45 . . . .
Front Cover 3A-46 . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-46 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 3A-46 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-46 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-47 . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel Housing 3A-48 . . . . . . . . . . . . . . . . . . . .
Removal 3A-48 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-48 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-49 . . . . . . . . . . . . . . . . . . . . . . . .
MCM Coupler / MIE Drive Plate 3A-49 . . . . . . . .
Removal 3A-49 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-49 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-50 . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel 3A-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-50 . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-51 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-51 . . . . . . . . . . . . . . . . . . . . . . . .
Rear Main Oil Seal 3A-53 . . . . . . . . . . . . . . . . . . .
Removal 3A-53 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-53 . . . . . . . . . . . .
Installation 3A-54 . . . . . . . . . . . . . . . . . . . . . . . .
Main Bearings 3A-54 . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3A-55 . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-55 . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Clearances 3A-56 . . . . . . . . . . . . . .
Installation 3A-57 . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rod Bearings 3A-63 . . . . . . . . . . . . .
Inspection and Replacement 3A-63 . . . . . . . .
Connecting Rod / Piston Assembly 3A-67 . . . . .
Removal 3A-67 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-68 . . . . . . . . . . . .
Reassembly 3A-71 . . . . . . . . . . . . . . . . . . . . . .
Installation 3A-73 . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 3A-75 . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3A-75 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-79 . . . . . . . . . . . .
Installation 3A-81 . . . . . . . . . . . . . . . . . . . . . . . .
Timing Chain and Sprocket 3A-84 . . . . . . . . . . . .
Removal 3A-84 . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-85 . . . . . . . . . . . .
Installation 3A-85 . . . . . . . . . . . . . . . . . . . . . . . .
90-863161 SEPTEMBER 2000 Page ix
ELECTRICAL SYSTEM
Section 4A - Starting System
Delco PG260 Starter Motor 4A-2 . . . . . . . . . . . . .
Identification 4A-2 . . . . . . . . . . . . . . . . . . . . . . .
Starter Specifications 4A-2 . . . . . . . . . . . . . . .
Torque Specifications 4A-2 . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 4A-2 . . . . .
Starter Removal 4A-3 . . . . . . . . . . . . . . . . . . . .
Solenoid Switch 4A-3 . . . . . . . . . . . . . . . . . . . .
Periodic Inspection 4A-3 . . . . . . . . . . . . . . . . .
Installation 4A-4 . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL SYSTEM
Section 4B - Ignition System
Specifications 4B-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Specifications 4B-2 . . . . . . . . . . . . . . .
Tools 4B-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 4B-2 . . . . . . .
Ignition Control System Components 4B-2 . . . .
EFI System Maintenance Precautions 4B-2 .
Spark Plugs 4B-3 . . . . . . . . . . . . . . . . . . . . . . . .
Spark Plug Wires 4B-5 . . . . . . . . . . . . . . . . . . .
ELECTRICAL SYSTEM
Section 4C - Charging System
Delco Alternator 4C-2 . . . . . . . . . . . . . . . . . . . . . . .
Identification 4C-2 . . . . . . . . . . . . . . . . . . . . . . .
Replacement Parts Warning 4C-2 . . . . . . . . .
Specifications 4C-2 . . . . . . . . . . . . . . . . . . . . . .
Torque Specifications 4C-2 . . . . . . . . . . . . . . .
Tools 4C-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 4C-3 . . . . .
Precautions 4C-3 . . . . . . . . . . . . . . . . . . . . . . . . . .
EFI Electrical System Precautions 4C-3 . . . .
Charging System Components 4C-4 . . . . . . . . . .
Periodic Maintenance 4C-4 . . . . . . . . . . . . . . . . . .
Serpentine Drive Belt 4C-5 . . . . . . . . . . . . . . . . . .
Removal 4C-5 . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation And Adjustment 4C-6 . . . . . . . . . .
Troubleshooting Tests
(Alternator on Engine) 4C-7 . . . . . . . . . . . . . . . . .
Charging System 4C-7 . . . . . . . . . . . . . . . . . . .
Charging System Resistance 4C-9 . . . . . . . . .
Circuitry 4C-11 . . . . . . . . . . . . . . . . . . . . . . . . . .
Exploded View 4C-13 . . . . . . . . . . . . . . . . . . . . . . .
Removal 4C-14 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4C-14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Isolator Diagram 4C-16 . . . . . . . . . . . .
FUEL SYSTEM
Section 5A - Fuel Delivery System For Electronic Fuel Injection
Specifications 5A–2 . . . . . . . . . . . . . . . . . . . . . . .
Torque Specifications 5A–2 . . . . . . . . . . . . . . . .
Tools 5A–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants / Sealants / Adhesives 5A–2 . . . . .
Precautions 5A–3 . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations 5A–4 . . . . . . . . . . . . . . . . . . . . . . .
Fuel Delivery System 5A–5 . . . . . . . . . . . . . . . .
Recommendations 5A–5 . . . . . . . . . . . . . . . .
Cool Fuel System Exploded View 5A–6 . . . . .
Fuel System Flow Diagrams 5A–7 . . . . . . . . . .
Multi-Port Injection 5A–7 . . . . . . . . . . . . . . . .
Water Separating Fuel Filter 5A–8 . . . . . . . . . .
Removal 5A–8 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5A–8 . . . . . . . . . . . . . . . . . . . . . . .
Fuel Boost Pump 5A–9 . . . . . . . . . . . . . . . . . . . .
Removal 5A–9 . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5A–9 . . . . . . . . . . . . . . . . . . . . . . .
Cool Fuel System Repair 5A–10 . . . . . . . . . . . . .
Removal 5A–10 . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 5A–11 . . . . . . . . . . . . . . . . . . . . .
Reassembly 5A–11 . . . . . . . . . . . . . . . . . . . . .
Installation 5A–14 . . . . . . . . . . . . . . . . . . . . . . .
Vacuum And Vent Hose Routing 5A–15 . . . . . .
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Mercury MerCruiser #30 Marine Engines 496CID / 8.1L Gasoline Engine Workshop Service Repair Manual 1998-UP
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Description
This manual is suitable for individuals ranging from first-time owners to professional technicians. It is designed in an easy-to-read format and provides comprehensive information necessary for accurate procedure execution.
Models Covered:
- Sterndrive (MCM) Model - Serial Number
- 496 Mag HO - S/N: 0M000000 & Up
- 496 Mag - S/N: 0M000000 & Up
- Inboard (MIE) Model - Serial Number
- 8.1S HO - S/N: 0M000000 & Up
- 8.1S Horizon - S/N: 0M000000 & Up
Table of Contents:
- Section 1 - Important Information
- A - General Information
- B - Maintenance
- C - Troubleshooting
- Section 2 - Removal and Installation
- A - MCM Models
- B - MIE Models
- Section 3 - Engine
- A - 496 cid (8.1L)
- Section 4 - Electrical System
- A - Starting System
- B - Ignition System
- C - Charging System
- Section 5 - Fuel System
- A - Fuel Delivery System for Electronic Fuel Injection
- B - Fuel Injection Disassembly and Reassembly
- Section 6 - Cooling System
- A - Closed Cooled Models
- Section 7 - Exhaust System
- A - Manifolds and Elbows
- B - Collectors
- Section 8 - Drives
- A - Velvet Drive 5000 Series Transmission
- B - Hurth Transmission
- Section 9 - Power Steering
- A - Pump
It is recommended to keep this shop manual accessible and refer to it regularly. Adhering to routine and preventive maintenance procedures will contribute to time and cost savings by averting premature failure and unnecessary repairs.
File Format: PDF
Compatibility: All Versions of Windows & Mac
Language: English
Requirements: Adobe Reader
