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25 Series
Mercury 25 Series User Manual
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ASSOCIATED PARTS
98
Associated Parts
Name
Quantity
Dimensions
Service tools
Tool bag
1
Pliers
1
Socket wrench
1
10 x 13 mm
Socket wrench
1
21 mm
Socket wrench handle
1
Screwdriver
1
Spare parts
Starter rope
1
1000 mm
Spark plug
1
NGK B7HS‑10 or
Campion L82C (Gap: 1.0
mm ‑ 0.035 in)
Cotter pin
1
Other*
Fuel tank
1
Primer bulb
1 set
Remote control box
1 set
Remote control attachment
1 set
Steering link
1 set
Flushing plug
1
* Not included as standard accessories in some markets.
105
107
Table of Contents
Table of Contents
5
Transfer of Warranty
9
Transfer of Mercury Product Protection (Extended Service Coverage) Plan
9
Warranty Information
9
Warranty Registration United States and Canada
10
Outboard Limited Warranty
11
Year Limited Warranty against Corrosion
14
Warranty Coverage and Exclusions
17
Boater's Responsibilities
20
Before Operating Your Outboard
20
General Information
20
Boat Horsepower Capacity
21
High-Speed and High-Performance Boat Operation
21
Outboard Remote Control Models
21
Remote Steering Notice
22
Lanyard Stop Switch
23
Protecting People in the Water
25
Passenger Safety Message - Pontoon Boats and Deck Boats
26
Wave and Wake Jumping
27
Impact with Underwater Hazards
28
Exhaust Emissions
29
Selecting Accessories for Your Outboard
31
Safe Boating Suggestions
31
Recording Serial Number
33
25/30 Specifications
34
Components: 25/30M
35
Installing Outboard
42
Installation
42
Installing the Remote Control Device (Right-Hand Steering)
44
Attaching the Steering Link Rod
53
Battery Installation
54
Propeller Selection
56
Trailering Boat/Outboard
57
Removing the Motor
57
Transporting Portable Fuel Tanks
58
Fuel Recommendations
60
Fuel & Oil
60
Oil Recommendation
61
Mixing Fuel and Oil
62
Filling Fuel Tank
62
Remote Control Features
64
Tilting Outboard
64
Features & Controls
64
Shallow Water Operation
65
Trim Adjustment
66
Steering Friction Adjustment
67
Trim Tab Adjustment
68
Pre-Starting Check List
70
Operating in Freezing Temperatures
70
Operating in Saltwater or Polluted Water
70
Operation
70
Operating at High Elevations
71
Engine Break-In Procedure
71
Starting the Engine
72
Warm-Up
78
Gear Shifting
79
Stopping the Engine
81
Emergency Starting
83
Outboard Care
85
EPA Regulations
85
EPA Emissions
86
Inspection and Maintenance Schedule
86
Flushing the Cooling System
88
Top Cowl Removal and Installation
89
Battery Inspection
90
Fuel System
90
Fuse Replacement - Electric Start Remote Control Models
92
Corrosion Control Anode
92
Propeller Replacement
93
Spark Plug Inspection and Replacement
97
Lubrication Points
98
Gearcase Lubrication
98
Submerged Outboard
100
Storage Preparation
101
Storage
101
Protecting External Outboard Components
102
Protecting Internal Engine Components
102
Gearcase
103
Positioning Outboard for Storage
103
Battery Storage
103
Starter Motor will Not Crank the Engine (Electric Start Models)
104
Engine will Not Start
104
Engine Runs Erratically
104
Troubleshooting
104
Performance Loss
105
Battery will Not Hold Charge
105
Accessories
107
Wiring Diagrams
111
Local Repair Service
120
Service Away from Home
120
Parts and Accessories Inquiries
120
Service Assistance
120
Owner Service Assistance
120
Mercury Marine Service Offices
121
Maintenance Log
123
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Mercury 25 Series Specifications
General
Gear Ratio
2.08:1
Horsepower
25 HP
Steering
Tiller
Shaft Length
15 in, 20 in
Starting
Manual
Full Throttle RPM Range
5000- RPM
Fuel Type
Gasoline
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