Mercury 25 hp BigFoot outboard motor repair manual

Table of contents

Section 1A: Specifications

• Specifications
• Propeller Information Chart
• Mercury/Quicksilver Lubricants and Sealants
• Torque Specifications

Section 1B: General Information

• Introduction
• Safety Precautions
• Maintenance Intervals
• Serial Number Locations
• Tools

Section 2: Ignition System

• Spark Plug
• Ignition Timing
• Ignition Coil Resistance
• Starter Motor
• Capacitor Discharge Ignition (CDI)

Section 3: Fuel System

• Fuel Pump
• Carburetor
• Fuel Filter
• Throttle Body
• Fuel Line Inspection

Section 4: Cooling System

• Water Pump
• Thermostat
• Cooling System Maintenance

Section 5: Power Unit

• Cylinder Block
• Cylinder Bore
• Piston and Rings
• Connecting Rod
• Crankshaft

Section 6: Lubrication System

• Oil Pump
• Oil Filter
• Oil Capacity and Specifications

Section 7: Electrical System

• Battery Specifications
• Charging System
• Alternator Output
• Wiring Diagrams

Section 8: Starting System

• Starter Motor Specifications
• Starter Solenoid
• Starting System Troubleshooting

Section 9: Gear Housing

• Gear Ratio
• Gear Housing Assembly
• Propeller Shaft

Section 10: Trim and Tilt System

• Hydraulic System
• Trim and Tilt Motor
• Trim and Tilt Troubleshooting

Section 11: Maintenance

• Periodic Maintenance Schedule
• Maintenance Procedures
• Service Intervals

Section 12: Troubleshooting

• Drive System Troubleshooting
• Hydraulic System Troubleshooting
• Electrical System Troubleshooting
• Cooling System Troubleshooting
• Fuel System Troubleshooting

Section 13: Special Tools

• Required Tools
• Tool Specifications
• Tool Usage

Appendix

• Technical Specifications
• Torque Specifications
• Conversion Tables
• Glossary of Terms

Index

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