| If
like most do-it-yourselfers you've relied on a sketchy owners manual
or one of those abstruse shop manuals written for professional mechanics
to keep your onboard running, heres an end to your frustration.
Although outboard engines have become more reliable, theyre also
more sophisticated and require more than a passing knowledge of
mechanics to troubleshoot and repair. Outboard Engines covers recent
developments such as electronic ignition, oil injection systems,
and four-stroke powerheads. Your fears about the reliability of
your finicky outboard are over!
Contents
Preface
One The Basics: What Makes Your Engine Tick
Your Engines Four Basic Needs
Inside Your Engine--The Basic Components
Basic Two-Stroke and Four-Stroke Cycles
The Four-Stroke
The Two-Stroke
The Basics of Troubleshooting
Two Breaking in a New Engine
General Break-in Guidelines
Additives
Oil Grades
Mix Ratio
Operating Procedure
Three Routine Maintenance
Daily Checks and Maintenance
Monthly Checks and Maintenance
Seasonal Checks and Maintenance
Three-Month (or Seasonal) Service Checks
Grease Points
Propeller Inspection
Gearcase-Oil Change
Cooling System
Impeller Replacement
Cylinder Compression
Fuel System
Automatic Oiler
Steering
Battery
Two Final Adjustments
Special Considerations for Four-Stroke Engines
Sump-Oil Change
Timing-Belt Wear
Valve Clearance Check
Maintenance in a Nutshell
Daily Checks
Monthly Checks
Seasonal Checks
Additional Four-Stroke Annual Service
Off-Season Storage and Spring Commissioning
Winter Storage
Spring Commissioning
Four How to Find the Trouble
Listen, Look, and Feel for Trouble
A Troubleshooting Plan of Attack
Ten Categories of Trouble
Symptoms and Probable Causes
Engine Will Not Start
Engine Runs Irregularly or Stalls
Rough Idle
Engine Speed Will Not Increase
Engine Overheats
Engine Speed Higher than Normal
Engine Speed Lower than Normal
Boat Speed Low
Steering Pulls to One Side
Excessive Blue Smoke
Five Isolating Ignition System Problems
Ignition Components and What They Do
Ignition Tests
Testing for Spark
Testing the Plugs
Ignition Problems--Tests and Procedures
Ignition Problems Checklist
Testing Spark-Plug Wires
Testing High-Tension Coils
Testing Charge and Sensor Coils and Ignition Module
Testing the Charge Coil
Testing the Sensor Coil
Testing Coil Voltages
Charge-Coil Test
Sensor-Coil Test
Ignition-Module Test
Under-the-Flywheel Systems
Some Additional Checks
Testing Your Stop Switch
Testing a Mercury (Tilt) Stop Switch
Final Checks and Ignition Timing
Checking the Timing
CDI Unit Problems
Optical Timing Systems
Summing It Up
Six The Charging and Starting Systems
Charging--The Key Components
How It All Works
Testing Your Battery
Battery Capacity Test
Battery Drain Test
Charging System Problems and Possible Causes
Verifying Charging-System Output
Testing Your AC Voltage Rectifier
Testing the Stator Windings
The Sequence to Follow
Troubleshooting Electric Starter Circuits
Voltage-Drop Test
Testing the Neutral Safety Switch
Neutral Switch Misadjustment
Testing an Ignition Switch
Other Starter-Related Problems
Manual Starters
Winding On a New Pull Cord
Replacing the Coil Spring
Seven The Fuel and Lubrication Systems
Fuel-Delivery Systems
The Spin-On Fuel/Water Separator
Fuel System Safety Considerations
Fuel-System Basics and Common Problems
Fuel-Tank Strainer
Anti-Siphon Valve
Flushing the Tank
Portable-Tank Strainers
The Fuel/Water Separator
The Primer Bulb
Fuel Pump Strainer
Fuel Supply Problems
The Fuel Pump
Checking the Seal
Fuel Pump Removal and Disassembly
Fuel Delivery Step by Step
Classic Symptoms of Carburetor Problems
Mixing Air and Fuel
How a Carburetor Works
The Float Circuit
The Idle Circuit
The Intermediate Circuit
The High-Speed Circuit
The Choke Circuit
Removing Your Carburetor
Disassembling Your Carburetor
Choke and Primer Systems
Further Checks
Manual Primers
Electric Primers
Electric Chokes
Thermal Wax Valves
Changing Technology
Lubrication Systems
The Pre-Mix Method
OMCs VRO System
Mechanical Oil-Pump Systems
Oil Recirculation Systems
Four-Stroke Engine Lubrication
Eight Servicing the Steering and Trim Systems
Tiller Steering
Steering-Tension Adjustment
Trim Tab Adjustment
Cable-Controlled Steering
Measuring for a New Steering Cable
Hydraulic Steering
Routine Servicing
Symptoms of Problems
Bleeding a Hydraulic System
Trim and Tilt Systems
Electrical Troubleshooting
Nine The Cooling System, Lower Unit, and Propeller
Air Cooling
Air-and-Water Cooling
Water Cooling
Symptoms of Overheating
Causes of Overheating
Thermostat Removal and Testing
Flushing Your Cooling System
Servicing the Water Pump
Reinstalling the Lower Unit
Testing the Overheat Alarm
The Shifting System
Diagnosing Shifting Problems
Lower-Unit Maintenance
Choosing a Propeller
Propeller Terms
Ten Dealing with Corrosion
Sacrificial Zincs
The Galvanic Series
Touching Up Paint Chips and Corrosion
Dealing with Hardware Corrosion
Releasing Fasteners and Preventing Corrosion
Frozen Bolts
Saving a Drowned Engine
Eleven A Look at the Future
An Era of Increased Reliability
A Range of Choices
The Mercury/Mariner DFI System
The Johnson/Evinrude (OMC) Ficht System
Yamahas Answer
Looking Ahead
Index
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