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TRANSPORTING

Trailering Boat/Outboard

Trailer your boat with the outboard tilted down in a vertical operating position.

If additional ground clearance is required, the outboard should be tilted up using an accessory outboard support

device. Refer to your local dealer for recommendations. Additional clearance may be required for railroad

crossings, driveways and trailer bouncing.

ob00660

IMPORTANT: Do not rely on the power trim/tilt system or tilt support lever to maintain proper ground clearance for

trailering. The outboard tilt support lever is not intended to support the outboard for trailering.

Shift the outboard to forward gear. This prevents the propeller from spinning freely.

Table of Contents2
Transfer of Warranty5
Warranty Registration United States and Canada5
Warranty Registration Outside the United States and Canada5
Warranty Information5
Mercury Marine Two Years Limited Warranty (Europe)6
Mercury Marine One Year Limited Warranty (Confederation of Independent States, Middle-East, Africa)7
Year Limited Warranty against Corrosion9
Warranty Coverage and Exclusions10
Boater's Responsibilities12
Before Operating Your Outboard12
Boat Horsepower Capacity12
General Information12
High-Speed and High-Performance Boat Operation13
Outboard Remote Control Models13
Remote Steering Notice13
Lanyard Stop Switch14
Protecting People in the Water15
Passenger Safety Message - Pontoon Boats and Deck Boats16
Wave and Wake Jumping16
Impact with Underwater Hazards17
Safety Instructions for Hand Tilled Outboards18
Exhaust Emissions18
Selecting Accessories for Your Outboard19
Safe Boating Suggestions19
Recording Serial Number20
75/90/115 EFI 4-Stroke Specifications - International20
Component Identification22
Installing Outboard23
Installation23
Propeller Selection24
Trailering Boat/Outboard25
Transporting25
Gasoline Recommendations26
Filling Fuel Tank26
Fuel & Oil26
Engine Oil Recommendations27
Checking and Adding Engine Oil27
Remote Control Features29
Warning System29
Features & Controls29
Power Trim and Tilt30
Power Trim Operation31
Trim Tab Adjustment33
Pre-Starting Check List35
Operating in Freezing Temperatures35
Operating in Salt Water or Polluted Water35
Engine Break-In Procedure35
Starting the Engine - Remote Control Models35
Operation35
Warming up Engine37
Gear Shifting38
Stopping the Engine38
Emergency Starting38
Outboard Care41
EPA Emissions41
Maintenance41
Inspection and Maintenance Schedule42
Flushing the Cooling System42
Top Cowl Removal and Installation43
Exterior Care44
Fuel System44
Steering Link Rod Fasteners45
Corrosion Control Anode45
Propeller Replacement47
Spark Plug Inspection and Replacement49
Fuse Replacement - 75/90 4-Stroke Models50
Fuse Replacement - 115 4-Stroke Models51
Timing Belt Inspection51
Battery Inspection52
Lubrication Points52
Checking Power Trim Fluid53
Changing Engine Oil54
Gearcase Lubrication55
Submerged Outboard56
Storage Preparation57
Protecting External Outboard Components57
Protecting Internal Engine Components57
Gearcase57
Positioning Outboard for Storage57
Battery Storage57
Storage57
Starter Motor will Not Crank the Engine (Electric Start Models)59
Engine will Not Start59
Engine Runs Erratically59
Performance Loss60
Battery will Not Hold Charge60
Local Repair Service61
Owner Service Assistance62

Brand	Mercury
Model	90
Category	Outboard Motor
Language	English

Mercury 90 User Manual

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