Mercury 25 EFI FourStroke User Manual

eng i
Thank You
for your purchase of one of the finest outboards available.
You have made a sound investment in boating pleasure.
Your outboard has been manufactured by Mercury Marine, a
world leader in marine technology and outboard
manufacturing since 1939. These years of experience have
been committed to the goal of producing the finest quality
products. This led to Mercury Marine's reputation for strict
quality control, excellence, durability, lasting performance,
and being the best at providing after the sale support.
Please read this manual carefully before operating your
outboard. This manual has been prepared to assist you in
the operation, safe use, and care of your outboard.
All of us at Mercury Marine took pride in building your
outboard and wish you many years of happy and safe
boating.
Again, thank you for your confidence in Mercury Marine.
EPA Emissions Regulations
Outboards sold by Mercury Marine in the United States are
certified to the United States Environmental Protection
Agency as conforming to the requirements of the regulations
for the control of air pollution from new outboard motors.
This certification is contingent on certain adjustments being
set to factory standards. For this reason, the factory
procedure for servicing the product must be strictly followed
and, wherever practicable, returned to the original intent of
the design. Maintenance, replacement, or repair of the
emission control devices and systems may be
performed by any marine engine repair establishment or
individual.
Engines are labeled with an Emission Control Information
decal as permanent evidence of EPA certification.
!
WARNING
The engine exhaust from this product contains chemicals
known to the state of California to cause cancer, birth
defects or other reproductive harm.
© 2012 Mercury Marine 25/30 EFI FourStroke 90-10244091 110

Mercury 25 EFI FourStroke Specifications

General

Brand	Mercury
Model	25 EFI FourStroke
Category	Outboard Motor
Language	English

Summary

Thank You

EPA Emissions Regulations

Warranty Information

Warranty Message

Explains the limited warranty, coverage, disclaimers, and limitations.

Mercury Premier Service

Describes Mercury's rating system for dealers based on service performance.

Warranty Registration

Transfer of Warranty

FourStroke Outboard Limited Warranty

What is Not Covered

Disclaimers and Limitations

3 Year Limited Warranty Against Corrosion

Warranty Coverage and Exclusions

General Information

Boater's Responsibilities

Outlines the operator's duty for safe boat operation and occupant safety.

Before Operating Your Outboard

Advises reading the manual and understanding operation before use.

Boat Horsepower Capacity

High-Speed and High-Performance Boat Operation

Propeller Selection

Outboard Remote Control Models

Remote Steering Notice

Important notice regarding the secure fastening of steering link rod components.

Lanyard Stop Switch

Protecting People in the Water

Passenger Safety Message - Pontoon Boats and Deck Boats

Wave and Wake Jumping

Impact with Underwater Hazards

Safety Instructions for Hand-Tilled Outboards

Exhaust Emissions

Selecting Accessories for Your Outboard

Safe Boating Suggestions

Recording Serial Number

Specifications

Component Identification

Transporting

Trailering Boat/Outboard

Instructions for properly trailering a boat with an outboard motor attached.

Transporting Your Outboard When Removed From Boat

Guidelines for safely transporting the outboard when it's removed from the boat.

Transporting Portable Fuel Tanks

Fuel and Oil

Fuel Recommendations

Specifies the recommended types and octane ratings of gasoline for satisfactory engine operation.

Using Reformulated (Oxygenated) Gasolines (USA Only)

Information on the use of oxygenated gasolines and potential effects.

Gasolines Containing Alcohol

Low Permeation Fuel Hose Requirement

Filling Fuel Tank

Engine Oil Recommendations

Checking And Adding Engine Oil

Features and Controls

Remote Control Features

Describes the functions and operations of Mercury Precision or Quicksilver remote controls.

Tiller Handle Model Features

Warning System

Operation

Prestarting Check List

A list of essential checks to perform before starting the outboard engine.

Operating in Freezing Temperatures

Precautions and procedures for operating the outboard in freezing or near-freezing conditions.

Operating in Saltwater or Polluted Water

Pre-Starting Instructions

Engine Break-in Procedure

Starting the Engine - Remote Control Models

Starting the Engine - Tiller Handle Models

Gear Shifting

Stopping the Engine

Emergency Starting

Maintenance

Outboard Care

General advice on keeping the outboard in the best operating condition through inspections.

Selecting Replacement Parts for Your Outboard

Recommendation to use genuine Mercury Precision or Quicksilver parts and lubricants.

EPA Emissions

Inspection and Maintenance Schedule

Battery Inspection

Fuel System

Fuel Filter (Low Pressure)

Steering Link Rod Fasteners

Corrosion Control Anode

Propeller Replacement

Spark Plug Inspection and Replacement

Fuse Replacement - Electric Start Models

Timing Belt Inspection

Lubrication Points

Checking Power Trim Fluid

Changing Engine Oil

Gearcase Lubrication

Submerged Outboard

Storage

Storage Preparation

Essential steps for protecting the outboard from rust, corrosion, and freezing during storage.

Protecting External Outboard Components

Protecting Internal Engine Components

Gearcase

Positioning Outboard for Storage

Battery Storage

Troubleshooting

Starter Motor Will Not Crank the Engine (Electric Start Models)

Troubleshooting steps for electric start models when the engine fails to crank.

Engine Will Not Start

Identifies possible causes and solutions when the engine fails to start.

Engine Runs Erratically

Performance Loss

Battery Will Not Hold Charge

Owner Service Assistance

Local Repair Service

Emphasizes using authorized dealers for factory-trained service and genuine parts.

Service Away from Home

Guidance on contacting the nearest authorized dealer when away from the home location.

Parts and Accessories Inquiries

Service Assistance

Installation

Installation Information

General information and warnings related to installing the outboard, including horsepower capacity.

Start in Gear Protection

Safety warning regarding starting the engine in gear and the neutral-safety protection device.

Selecting Accessories for Your Outboard

Low Permeation Fuel Hose Requirement

Electric Fuel Pump

Installing Outboard

Installation Specifications

Specifications for transom opening and engine center line for outboard installation.

Top Cowl Removal and Installation

Instructions for removing and installing the top cowl of the outboard.

Lifting Outboard

Installing the Outboard on the Transom (Manual Tilt Models)

Installing the Outboard on the Transom (Power Trim and Gas Assist)

Control Cable Installation

Throttle Cable Installation

Steps for installing and adjusting the throttle cable to the throttle actuating lever.

Shift Cable Installation

Steps for installing and adjusting the shift cable for proper gear engagement.

Battery Cable Connections