Mercury 25 Series User manual

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.

Warranty Message

The product you have purchased comes with a limited warranty

from Mercury Marine, the terms of the warranty are set forth in the

Warranty Information Section of this manual. The warranty

statement contains a description of what is covered, what is not

covered, the duration of coverage, how to best obtain warranty

coverage, important disclaimers and limitations of damages,

and other related information. Please review this important

information.

The description and specifications contained herein were in effect

at the time this manual was approved for printing. Mercury Marine,

whose policy is one of continued improvement, reserves the right

to discontinue models at any time, to change specifications,

designs, methods, or procedures without notice and without

incurring obligation.

Mercury Marine, Fond du Lac, Wisconsin U.S.A.

Litho in U.S.A.

Mercury, Mercury Marine, MerCruiser, Mercury MerCruiser,

Mercury Racing, Mercury Precision Parts, Mercury Propellers,

Mariner, Quicksilver, #1 On The Water, Alpha, Bravo, Pro Max,

OptiMax, Sport‑Jet, K‑Planes, MerCathode, RideGuide,

SmartCraft, Zero Effort, M with Waves logo, Mercury with Waves

logo, and SmartCraft logo are all registered trademarks of

Brunswick Corporation. Mercury Product Protection logo is a

registered service mark of Brunswick Corporation.

Declaration of Conformity

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 Industriel, de

Petit‑Rechain, Belgium complies with the requirements of the

following directives and standards, as amended:

Recreational Craft Directive: 94/25/EC

Owner's manual (A.2.5) ISO 10240

iii

Handling characteristics (A.4) ISO 8665

Outboard engine starting (A.5.1.4) ISO 11547

Fuel tanks (A.5.2.2) ISO 13591; ISO 8469

General steering system ABYC P‑17

Safety of Machinery Directive 98/37/EC

Principles of safety integration

(1.1.2) EN 292‑1; EN 292‑2; EN 1050

Noise (1.5.8) ICOMIA 39/94

Vibration ICOMIA 38/94

Electromagnetic Compatibility

Directive 89/336/EC

Generic emission standard EN 50081‑1

Generic immunity standard EN 50082‑1

Vehicles, boats and internal

combustion engine driven devices ‑

radio disturbance characteristics

SAE J551 (CISPR 12)

Electrostatic discharge testing EN 61000‑6‑2; EN 61000‑4‑2; EN

61000‑4‑3

This declaration is issued under the sole responsibility of Mercury

Marine and Marine Power Europe.

Patrick C. Mackey

President, Mercury Marine, Fond du Lac, WI USA

European Regulations Contact:

Regulations and Product Safety Department, Mercury Marine,

Fond du Lac, WI USA

Mercury Premier Service

Mercury evaluates the service performance of its dealers and

assigns its highest rating of "Mercury Premier" to those

demonstrating an exceptional commitment to service.

Earning a Mercury Premier Service rating means a dealer:

• Achieves a high 12 month service CSI (Customer Satisfaction

Index) score for warranty service.

• Possesses all necessary service tools, test equipment,

manuals and parts books.

• Employs at least one Certified or Master technician.

• Provides timely service for all Mercury Marine customers.

• Offers extended service hours and mobile service, when

appropriate.

• Uses, displays and stocks adequate inventory of genuine

Mercury Precision Parts.

• Offers a clean, neat shop with well organized tools and service

literature.

TABLE OF CONTENTS

Warranty Information

Transfer of Warranty....................................................................1

Transfer of Mercury Product Protection (Extended Service

Coverage) Plan............................................................................1

Warranty Registration United States And Canada......................2

Outboard Limited Warranty..........................................................3

3 Year Limited Warranty Against Corrosion................................6

Warranty Coverage and Exclusions............................................9

GENERAL INFORMATION

Boater's Responsibilities............................................................12

Before Operating Your Outboard...............................................12

Boat Horsepower Capacity........................................................13

High‑Speed and High‑Performance Boat Operation................. 13

Outboard Remote Control Models.............................................13

Remote Steering Notice.............................................................14

Lanyard Stop Switch..................................................................15

Protecting People in the Water..................................................17

Passenger Safety Message ‑ Pontoon Boats and Deck Boats..18

Wave and Wake Jumping..........................................................19

Impact with Underwater Hazards...............................................20

Exhaust Emissions.................................................................... 21

Selecting Accessories for Your Outboard..................................23

Safe Boating Suggestions......................................................... 23

Recording Serial Number.......................................................... 25

25/30 Specifications...................................................................26

Components: 25/30M................................................................ 27

INSTALLATION

Installing Outboard.....................................................................34

Installing the Remote Control Device (Right‑Hand Steering).... 36

Attaching the Steering Link Rod................................................45

Battery Installation ....................................................................46

Propeller Selection.....................................................................48

TABLE OF CONTENTS

TRANSPORTING

Trailering Boat/Outboard...........................................................49

Removing the Motor..................................................................49

Transporting Portable Fuel Tanks.............................................50

FUEL & OIL

Fuel Recommendations.............................................................52

Oil Recommendation.................................................................53

Mixing Fuel and Oil....................................................................54

Filling Fuel Tank........................................................................54

FEATURES & CONTROLS

Remote Control Features..........................................................56

Tilting Outboard ........................................................................56

Shallow Water Operation...........................................................57

Trim Adjustment.........................................................................58

Steering Friction Adjustment......................................................59

Trim Tab Adjustment.................................................................60

OPERATION

Pre‑Starting Check List..............................................................62

Operating in Freezing Temperatures.........................................62

Operating in Saltwater or Polluted Water..................................62

Operating at High Elevations.....................................................63

Engine Break‑in Procedure........................................................63

Starting the Engine....................................................................64

Warm‑Up...................................................................................70

Gear Shifting..............................................................................71

Stopping the Engine..................................................................73

Emergency Starting...................................................................75

TABLE OF CONTENTS

vii

MAINTENANCE

Outboard Care...........................................................................77

EPA Regulations........................................................................77

EPA Emissions..........................................................................78

Inspection and Maintenance Schedule......................................78

Flushing the Cooling System.....................................................80

Top Cowl Removal and Installation...........................................81

Battery Inspection .....................................................................82

Fuel System...............................................................................82

Fuse Replacement ‑ Electric Start Remote Control Models......84

Corrosion Control Anode...........................................................84

Propeller Replacement..............................................................85

Spark Plug Inspection and Replacement...................................89

Lubrication Points......................................................................90

Gearcase Lubrication.................................................................90

Submerged Outboard................................................................92

STORAGE

Storage Preparation...................................................................93

Protecting External Outboard Components...............................94

Protecting Internal Engine Components....................................94

Gearcase...................................................................................95

Positioning Outboard for Storage..............................................95

Battery Storage..........................................................................95

TROUBLESHOOTING

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

...................................................................................................96

Engine Will Not Start..................................................................96

Engine Runs Erratically.............................................................96

Performance Loss......................................................................97

Battery Will Not Hold Charge.....................................................97

TABLE OF CONTENTS

viii

ASSOCIATED PARTS

Associated Parts........................................................................98

ACCESSORIES

Accessories...............................................................................99

WIRING DIAGRAMS

Wiring Diagrams......................................................................103

OWNER SERVICE ASSISTANCE

Local Repair Service................................................................112

Service Away from Home........................................................112

Parts and Accessories Inquiries..............................................112

Service Assistance..................................................................112

Mercury Marine Service Offices...............................................113

MAINTENANCE LOG

Maintenance Log.....................................................................115

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.

This will not apply to products used for commercial applications.

To transfer the warranty to the subsequent owner, send or fax a

copy of the bill of sale or purchase agreement, new owner’s name,

address and engine serial number to Mercury Marine’s warranty

registration department. In the United States and Canada, mail to:

Mercury Marine

Attn: Warranty Registration Department

W6250 W. Pioneer Road

P.O. Box 1939

Fond du Lac, WI 54936-1939

920-929-5054

Fax +1 920 929 5893

Upon processing the transfer of warranty, Mercury Marine will send

registration verification to the new owner of the product by mail.

There is no charge for this service.

For products purchased outside the United States and Canada,

contact the distributor in your country, or the Marine Power Service

Center closest to you.

Transfer of Mercury Product Protection (Extended

Service Coverage) Plan

The remaining coverage period of the Product Protection Plan is

transferable to the subsequent purchaser of the engine within thirty

(30) days from the date of sale. Contracts not transferred within

thirty (30) days of the subsequent purchase will no longer be valid

and the product will no longer be eligible for coverage under the

terms of the contract.

To transfer the plan to the subsequent owner, contact Mercury

Product Protection or authorized dealer to receive a Request for

Transfer form. Submit to Mercury Product Protection a receipt/bill

of sale, a completed Request of Transfer form, and a check

payable to Mercury Marine in the amount of $50.00 (per engine)

to cover the transfer fee.

WARRANTY INFORMATION

Plan coverage is not transferable from one product to another

product or for non‑eligible applications.

The Certified Pre‑Owned engine plans are not transferable.

For help or assistance, contact Mercury Product Protection

Department at 1‑888‑427‑5373 from 7:30 a.m. to 4:30 p.m. CST,

Monday ‑ Friday or email [email protected].

Warranty Registration United States And Canada

Outside United States and Canada ‑ Check with your local

distributor.

1. You may change your address at any time, including at time

of warranty claim, by calling Mercury Marine or sending a letter

or fax with your name, old address, new address, and engine

serial number to Mercury Marine’s warranty registration

department. Your dealer can also process this change of

information.

Mercury Marine

Attn: Warranty Registration Department

W6250 W. Pioneer Road

P.O. Box 1939

Fond du Lac, WI 54936-1939

920-929-5054

Fax 920-929-5893

NOTE: Registration lists must be maintained by Mercury Marine

and any dealer on marine products sold in the United States,

should a safety recall notification under the Federal Safety Act be

required.

2. To be eligible for warranty coverage, the product must be

registered with Mercury Marine. At the time of sale, the dealer

should complete the warranty registration and immediately

submit it to Mercury Marine via MercNET, E‑mail, or mail.

Upon receipt of this warranty registration, Mercury Marine will

record the registration.

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