Mercury 250 Pro XS OptiMax

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Table of Contents7
Warranty Registration13
Warranty Information13
Transfer of Warranty14
Transfer of Mercury Product Protection (Extended Service Coverage) Plan United States and Canada14
Outboard Limited Warranty15
Year Limited Warranty against Corrosion19
Warranty Coverage and Exclusions23
U.S. EPA Emissions Limited Warranty25
Emission Control System Components25
California Emissions Limited Warranty26
California Air Resources Board Explanation of Your California Emission Control Warranty Statement30
Emission Certification Star Label31
Boater's Responsibilities33
Before Operating Your Outboard33
Boat Horsepower Capacity33
General Information33
Intended Boat Application34
Propeller Selection34
Outboard Remote Control Models37
Remote Steering Notice38
Lanyard Stop Switch38
Protecting People in the Water42
Exhaust Emissions42
Passenger Safety Message - Pontoon Boats and Deck Boats45
Wave and Wake Jumping47
Impact with Underwater Hazards48
Selecting Accessories for Your Outboard49
Safe Boating Suggestions49
Recording Serial Number52
Specifications52
Component Identification54
Trailering Boat/Outboard55
Avoiding Fuel Flow Restrictions56
Fuel Requirements56
Fuel and Oil56
Low Permeation Fuel Hose Requirement58
Oil Recommendation58
Filling Remote Oil Tank59
Filling Engine Mounted Oil Reservoir Tank59
Filling Fuel Tank59
Remote Control Features61
Features and Controls61
Zero Effort Control Features62
Warning System62
Water Pressure64
Overspeed Rev Limit65
Power Trim and Tilt66
Engine Break-In71
Engine Break-In Fuel Mixture71
Pre-Starting Check List71
Operation71
Operating in Freezing Temperatures72
Operating in Saltwater or Polluted Water72
Operating at High Elevations73
Effects of Elevation and Weather on Performance73
Operating in Shallow Water74
Setting Trim Angle While Running Engine at Idle Speed74
Starting the Engine75
Gear Shifting78
Stopping the Engine78
Power Package Care79
Submerged Power Package79
Replacement Parts for Your Power Package79
EPA Emissions Regulations80
Inspection and Maintenance Schedule81
Flushing the Cooling System (Powerhead)84
Flushing the Cooling System (Lower Unit)85
Top Cowl Removal and Installation86
Cleaning Care for Top Cowl86
Fuel System87
Steering Link Rod Fasteners90
Fuses92
Corrosion Control Anode93
Spark Plug Inspection and Replacement94
Battery Inspection96
Charging System Fusible Link97
Propeller Replacement - 25.4 MM (1.0 In.) Diameter Propeller Shaft97
Propeller Replacement - 31.75 MM (1-1/4 In.) Diameter Propeller Shaft100
Lubrication Points102
Checking Power Trim Fluid104
Gearcase Lubrication105
Storage Preparation107
Storage107
Protecting Internal Engine Components109
Protecting External Outboard Components109
Positioning Outboard for Storage110
Battery Storage110
Gearcase110
Starter Motor will Not Crank the Engine111
Engine will Not Start111
Troubleshooting111
Engine Runs Erratically112
Performance Loss112
Warning Horn Activates (with Power Loss)112
Warning Horn Activates (no Power Loss)113
Battery will Not Hold Charge113
Local Repair Service115
Service Away from Home115
Parts and Accessories Inquiries115
Service Assistance115
Owner Service Assistance115
Mercury Marine Service Offices116
Ordering Literature117
Important Information118
Avoiding Fuel Flow Restriction118
Outboard Installation118
Boat Horsepower Capacity119
Start in Gear Protection119
Selecting Accessories for Your Outboard119
Fuel Tanks120
Low Permeation Fuel Hose Requirement120
Filling the Fuel System120
Installation Specifications121
Lifting the Outboard121
Steering Cable - Starboard Side Routed Cable122
Steering Link Rod Fasteners123
Determining Recommended Outboard Mounting Height126
Drilling Outboard Mounting Holes127
Fastening the Outboard to the Transom128
Electrical, Hoses, Control Cables, and Front Clamp132
Single Outboard133
Filling the Fuel System149
Oil Injection Set-Up150
Trim in Pin153
Maintenance Log155

Mercury 250 Pro XS OptiMax

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