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Mercury 2.5

Mercury 2.5
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Welcome Aboard!
Proper care and maintenance is an important part in keeping your Mercury Product operating at peak
efficiency for maximum performance and economy. The enclosed Owner's Registration Card is your key
to trouble-free family fun. Refer to your Operation and Maintenance Manual for full details of your warranty
coverage.
Details of your nearest dealer can be found on www.marinepower.com where country maps and full
contact information are displayed.
Is your engine properly registered for warranty purpose? Please check on www.marinepower.com. If
necessary, please contact your local dealer.
If the outboard motor’s serial number plate contains the CE mark in the lower left-hand corner, the
following statement applies:
This outboard motor manufactured by Mercury Marine, Fond du Lac, WI, USA or Marine Power Europe
Inc. Park Industrel, de Petit-Rechain, Belgium complies with the requirements of the following directives
and standards, as amended:
Recreational Craft Directive: 94/25/EC; std. ISO 8665, ISO 11547
Machinery Directive: 98/37/EC,
EMC Directive: 89/336/EC; std. EN50081-1, SAE J551 (CISPR Pub. 12),
EN 50082-1, IEC 61000 PT4-2, IEC 61000 PT4-3
Patrick C. Mackey
President, Mercury Marine, Fond du Lac, WI USA
European Regulations Contact:
Product Environmental Engineering Department, Mercury Marine, Fond du Lac, WI USA
© 2004 Mercury Marine 2.5/3.3 90-10100R50 204

Table of Contents

Other manuals for Mercury 2.5

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Mercury 2.5 Specifications

General IconGeneral
Fuel Induction SystemCarburetor
IgnitionCDI
StartingManual
SteeringTiller
Cylinders1
Recommended Fuel87 Octane
Shaft Length15 in (381 mm)
Horsepower2.5 HP
Gear ShiftForward, Neutral

Summary

Warranty Information

Transfer Of Warranty

The limited warranty is transferable to a subsequent purchaser, but only for the remainder of the unused portion of the limited warranty.

Warranty Registration United States And Canada

Process for registering your product with Mercury Marine in the US and Canada for warranty coverage.

Warranty Registration Outside The United States And Canada

Steps for registering your product outside the US and Canada with Mercury Marine.

Mercury Marine Two Years Limited Warranty (Europe)

Details of the two-year limited warranty coverage for Mercury products sold in Europe.

Mercury Marine One Year Limited Warranty (Confederation of Independent States, Middle-East, Africa)

Details of the one-year limited warranty for specific regions outside Europe.

3 Year Limited Warranty Against Corrosion

Details of the three-year limited warranty specifically covering corrosion damage.

Warranty Coverage And Exclusions

Clarifies common misunderstandings about what is and is not covered by warranty.

GENERAL EXCLUSIONS FROM WARRANTY

Lists specific items and conditions that are not covered by the limited warranty.

General Information

Boaters Responsibilities

Outlines the operator's duties for safe operation and compliance with manual.

Before Operating Your Outboard

Guidance on reading the manual and understanding safety labels before use.

Boat Horsepower Capacity

Warning about exceeding a boat's maximum horsepower limit and its consequences.

Lanyard Stop Switch

Explains the function and importance of the lanyard stop switch for safety.

Protecting People In The Water

Safety advice for preventing injuries to people in water near the boat.

Exhaust Emissions

Information about carbon monoxide poisoning and ventilation.

Selecting Accessories For Your Outboard

Guidance on choosing and installing accessories for the outboard.

Safe Boating Suggestions

Recommendations for safe operation, including flotation devices and obeying rules.

Recording Serial Number

Instructions on where to find and record the outboard's serial number.

Specifications

Technical specifications for the 2.5 and 3.3 HP models.

Installation

Installing Outboard

Instructions for mounting the outboard onto the boat's transom.

Transporting

Carrying Outboard

Guidance on how to carry the outboard motor.

Transporting Outboard When Removed From Boat

Procedures for transporting the outboard when it's not mounted on a boat.

Trailering Boat

Important considerations for trailering a boat with the outboard attached.

Fuel and Oil

Gasoline Recommendations

Advice on the type and grade of gasoline to use for the outboard engine.

Oil Recommendation

Specifies the recommended type of oil for mixing with fuel.

Mixing Fuel and Oil

Instructions on the correct fuel-to-oil ratio for different stages of use.

Filling Fuel Tank

Safety precautions and steps for filling the fuel tank.

Features and Controls

Features & Controls

Overview of the throttle, choke, and stop switch controls.

Tilting Outboard

Instructions on how to tilt the outboard motor to the full up position.

Setting The Operating Angle Of Your Outboard

How to adjust the outboard's tilt angle for optimal performance.

Operation

Pre-Starting Check List

Essential checks to perform before starting the outboard engine.

Operating In Freezing Temperatures

Procedures for operating the outboard in cold weather conditions.

Operating In Salt Water Or Polluted Water

Recommendations for flushing and cleaning after use in salt or polluted water.

Engine Break-in Procedure

Instructions for the initial break-in period of the engine.

Starting The Engine

Step-by-step guide on how to start the outboard engine.

Stopping The Engine

Procedure for safely shutting down the outboard engine.

Gear Shifting - Models with Gear Shift

How to operate the gear shift for forward and neutral positions.

Emergency Starting

Instructions for starting the engine using a spare starter rope.

Maintenance

Outboard Care

General advice for maintaining the outboard's operating condition and safety.

SELECTING REPLACEMENT PARTS FOR YOUR OUTBOARD

Recommendation to use genuine Mercury parts for replacements.

EPA Emissions

Information about the emission certification label and owner responsibility.

Inspection And Maintenance Schedule

Schedule of checks and maintenance tasks before, after, and periodically.

Top Cowl Removal And Installation

Steps for removing and reinstalling the top engine cowl.

Exterior Care

How to clean and protect the outboard's exterior finish.

Flushing The Cooling System

Procedure for flushing the engine's cooling system with fresh water.

Propeller Replacement

Detailed steps for replacing the outboard's propeller.

Corrosion Control Anode

Explanation of the anode's function and inspection/replacement.

Spark Plug Inspection And Replacement

Guide for inspecting and replacing the spark plugs.

Engine Idle Speed Adjustment

How to adjust the engine's idle speed for proper operation.

Lubrication Points

Locations and procedures for lubricating various outboard components.

Gearcase Lubrication

Instructions for checking and changing the gearcase lubricant.

DRAINING GEARCASE

Steps for properly draining the lubricant from the gearcase.

GEARCASE LUBRICANT CAPACITY

Specifies the volume of lubricant required for the gearcase.

CHECKING LUBRICANT LEVEL AND REFILLING GEARCASE

Procedure for checking and refilling the gearcase lubricant.

Submerged Outboard

Immediate service procedures required if the outboard becomes submerged.

Storage

Storage Preparation

Procedures for preparing the outboard for seasonal or prolonged storage.

FUEL SYSTEM

Important considerations for the fuel system when storing the outboard.

Protecting External Outboard Components

Steps to protect the outboard's external parts during storage.

Protecting Internal Engine Components

Procedures for protecting the internal engine parts during storage.

Gearcase

Gearcase maintenance procedures related to storage.

Positioning Outboard For Storage

Correct orientation for storing the outboard to prevent damage.

Troubleshooting

Engine Will Not Start

Common causes and solutions when the engine fails to start.

Engine Runs Erratically

Troubleshooting steps for an engine that runs unevenly.

Performance Loss

Potential reasons for reduced engine performance and how to address them.

Owner Service Assistance

Local Repair Service

Guidance on returning the outboard to a local authorized dealer for service.

Service Away From Home

How to find and contact the nearest authorized dealer when traveling.

Parts And Accessories Inquiries

Where to direct questions about genuine replacement parts and accessories.

Service Assistance

Steps to take if you need further assistance from Mercury Marine.

Mercury Marine Service Offices

Contact information for Mercury Marine service offices in various regions.

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