Mercury 25 Series

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INSTALLATION

Installing Outboard

We strongly recommend that your dealer install your outboard and

related accessories ot ensure proper installation and good

performance. If you install the outboard yourself, follow instructions

in the manual which is provided with the outboard.

Main Page

Table of Contents5
Transfer of Warranty9
Transfer of Mercury Product Protection (Extended Service Coverage) Plan9
Warranty Information9
Warranty Registration United States and Canada10
Outboard Limited Warranty11
Year Limited Warranty against Corrosion14
Warranty Coverage and Exclusions17
Boater's Responsibilities20
Before Operating Your Outboard20
General Information20
Boat Horsepower Capacity21
High-Speed and High-Performance Boat Operation21
Outboard Remote Control Models21
Remote Steering Notice22
Lanyard Stop Switch23
Protecting People in the Water25
Passenger Safety Message - Pontoon Boats and Deck Boats26
Wave and Wake Jumping27
Impact with Underwater Hazards28
Exhaust Emissions29
Selecting Accessories for Your Outboard31
Safe Boating Suggestions31
Recording Serial Number33
25/30 Specifications34
Components: 25/30M35
Installing Outboard42
Installation42
Installing the Remote Control Device (Right-Hand Steering)44
Attaching the Steering Link Rod53
Battery Installation54
Propeller Selection56
Trailering Boat/Outboard57
Removing the Motor57
Transporting Portable Fuel Tanks58
Fuel Recommendations60
Fuel & Oil60
Oil Recommendation61
Mixing Fuel and Oil62
Filling Fuel Tank62
Remote Control Features64
Tilting Outboard64
Features & Controls64
Shallow Water Operation65
Trim Adjustment66
Steering Friction Adjustment67
Trim Tab Adjustment68
Pre-Starting Check List70
Operating in Freezing Temperatures70
Operating in Saltwater or Polluted Water70
Operation70
Operating at High Elevations71
Engine Break-In Procedure71
Starting the Engine72
Warm-Up78
Gear Shifting79
Stopping the Engine81
Emergency Starting83
Outboard Care85
EPA Regulations85
EPA Emissions86
Inspection and Maintenance Schedule86
Flushing the Cooling System88
Top Cowl Removal and Installation89
Battery Inspection90
Fuel System90
Fuse Replacement - Electric Start Remote Control Models92
Corrosion Control Anode92
Propeller Replacement93
Spark Plug Inspection and Replacement97
Lubrication Points98
Gearcase Lubrication98
Submerged Outboard100
Storage Preparation101
Storage101
Protecting External Outboard Components102
Protecting Internal Engine Components102
Gearcase103
Positioning Outboard for Storage103
Battery Storage103
Starter Motor will Not Crank the Engine (Electric Start Models)104
Engine will Not Start104
Engine Runs Erratically104
Troubleshooting104
Performance Loss105
Battery will Not Hold Charge105
Accessories107
Wiring Diagrams111
Local Repair Service120
Service Away from Home120
Parts and Accessories Inquiries120
Service Assistance120
Owner Service Assistance120
Mercury Marine Service Offices121
Maintenance Log123

Table of Contents

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