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25 Jet FourStroke
Mercury 25 Jet FourStroke User Manual
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Operation
Maintenance
and
Installation
Manual
© 2018 Mercury Marine
25 Jet FourStroke
8M0145522
418
eng
2
Table of Contents
Table of Contents
7
Boater's Responsibilities
11
Before Operating Your Outboard
11
Boat Horsepower Capacity
11
General Information
11
High-Speed and High-Performance Boat Operation
12
Outboard Remote Control Models
12
Remote Steering Notice
13
Lanyard Stop Switch
13
Protecting People in the Water
16
Wave and Wake Jumping
17
Safety Instructions for Hand-Tilled Outboards
17
Exhaust Emissions
18
Selecting Accessories for Your Outboard
20
Safe Boating Recommendations
20
Recording Serial Number
23
Model Year Production Code
23
Specifications
24
Component Identification
25
Trailering Boat/Outboard
27
Transporting
27
Fuel Requirements
28
Fuel and Oil
28
Low Permeation Fuel Hose Requirement
29
EPA Pressurized Portable Fuel Tank Requirements
29
Fuel Demand Valve (FDV) Requirement
29
Mercury Marine's Pressurized Portable Fuel Tank
30
Filling Fuel Tank
31
Engine Oil Recommendations
31
Checking and Adding Engine Oil
32
Remote Control Features
34
Tiller Handle Models
34
Features and Controls
34
Power Trim and Tilt (if Equipped)
40
Warning System
42
Replaceable Jet Drive Shear Key
45
Prestarting Check List
46
Operating in Freezing Temperatures
46
Operating in Saltwater or Polluted Water
46
Operation
46
Operating in Shallow Water
47
How the Jet Drive Operates
47
Stopping the Boat in an Emergency
49
Steering the Boat
49
Mooring the Boat
50
Water Intake Blockage
50
Clearing a Lodged Impeller
50
Prestarting Instructions
51
Engine Break-In Procedure
52
Starting the Engine - Remote Control Models
52
Starting the Engine - Tiller Handle Models
54
Gear Shifting
57
Stopping the Engine
58
Emergency Starting
58
Cleaning Care Recommendations
60
Maintenance
60
EPA Emission Regulations
62
Inspection and Maintenance Schedule
63
Top Cowl Removal and Installation
64
Worn/Dull Impeller
64
Impeller Clearance Adjustment
65
Impeller Removal and Installation
66
Shift Link Rod Adjustment
69
Battery Inspection
70
Fuel System
70
Steering Link Rod Fasteners
71
Corrosion Control Anode
72
Spark Plug Inspection and Replacement
73
Fuse Replacement - Electric Start Models
74
Timing Belt Inspection
75
Lubrication Points
75
Checking Power Trim Fluid
78
Changing Engine Oil
79
Submerged Outboard
81
Storage Preparation
82
Protecting External Outboard Components
82
Protecting Internal Engine Components
83
Jet Drive
83
Positioning Outboard for Storage
83
Battery Storage
83
Starter Motor will Not Crank the Engine (Electric Start Models)
84
Engine will Not Start
84
Engine Runs Erratically
84
Troubleshooting
84
Engine Overspeed (Excessive RPM)
85
Performance Loss
85
Battery will Not Hold Charge
85
Service Assistance
86
Owner Service Assistance
86
Ordering Literature
88
Installation Information
90
Installation
90
Top Cowl Removal and Installation
92
Lifting Outboard
93
Determining the Mounting Height of the Outboard Jet
93
Fastening the Outboard
95
Steering Bracket, Steering Cable Installation
97
Steering Link Rod Fasteners
98
Electrical Harness, Battery Connection, Fuel Tanks
101
Control Cable Installation
104
Water Testing
108
Maintenance Log
110
4
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Mercury 25 Jet FourStroke Specifications
General
Brand
Mercury
Model
25 Jet FourStroke
Category
Outboard Motor
Language
English
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