Mercury 25 4-Stroke User Manual

TABLE OF CONTENTS
iii
FEATURES & CONTROLS
Remote Control Features..................................................................................................................................... 26
Warning System................................................................................................................................................... 26
Manual Gas Assisted Tilt System - Tiller Handle Models..................................................................................... 28
Manual Tilt System - Remote Control Models Without Power Trim..................................................................... 30
Power Trim And Tilt (If Equipped)........................................................................................................................ 33
Throttle Grip Friction Adjustment - Tiller Handle Models...................................................................................... 36
Steering Friction Adjustment ............................................................................................................................... 36
Trim Tab Adjustment............................................................................................................................................ 37
OPERATION
Pre-Starting Check List......................................................................................................................................... 39
Operating In Freezing Temperatures................................................................................................................... 39
Operating In Salt Water Or Polluted Water.......................................................................................................... 39
Pre-Starting Instructions....................................................................................................................................... 39
Engine Break-in Procedure.................................................................................................................................. 40
Starting The Engine - Remote Control Models..................................................................................................... 40
Starting The Engine - Tiller Handle Models..........................................................................................................42
Gear Shifting ........................................................................................................................................................45
Stopping The Engine ........................................................................................................................................... 45
Emergency Starting ............................................................................................................................................. 46
MAINTENANCE
Outboard Care......................................................................................................................................................48
EPA Emissions..................................................................................................................................................... 48
Inspection And Maintenance Schedule................................................................................................................ 49
Flushing The Cooling System...............................................................................................................................49
Top Cowl Removal And Installation......................................................................................................................50
Exterior Care........................................................................................................................................................ 51
Battery Inspection ................................................................................................................................................51
Fuel System..........................................................................................................................................................51
Steering Link Rod Fasteners................................................................................................................................ 52
Corrosion Control Anode...................................................................................................................................... 52
Propeller Replacement......................................................................................................................................... 53
Spark Plug Inspection And Replacement............................................................................................................. 55
Fuse Replacement - Electric Start Models........................................................................................................... 56
Timing Belt Inspection.......................................................................................................................................... 57
Lubrication Points................................................................................................................................................. 57
Checking Power Trim Fluid.................................................................................................................................. 59
Changing Engine Oil ............................................................................................................................................ 60
Gearcase Lubrication........................................................................................................................................... 61
Submerged Outboard........................................................................................................................................... 62
STORAGE
Storage Preparation............................................................................................................................................. 63
Protecting External Outboard Components..........................................................................................................63
Protecting Internal Engine Components............................................................................................................... 63
Gearcase.............................................................................................................................................................. 63

Mercury 25 4-Stroke Specifications

General

Engine Type	4-Stroke
Horsepower	25 hp
Cylinders	2
Fuel Induction System	Electronic Fuel Injection (EFI)
Full Throttle RPM Range	5000-6000 RPM
Starting System	Electric
Steering	Remote or Tiller
Shaft Length	15 in / 20 in
Dry Weight	157 lbs
Fuel Tank Capacity	External
Oil Capacity	1.5 L (with filter)