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Thank You
for your purchase of one of the finest outboards available. You
have made a sound investment in boating pleasure. Your
outboard has been manufactured by Mercury Marine, a world
leader in marine technology and outboard manufacturing
since 1939. These years of experience have been committed
to the goal of producing the finest quality products. This led to
Mercury Marine's reputation for strict quality control,
excellence, durability, lasting performance and being the best
at providing after the sale support.
Please read this manual carefully before operating your
outboard. This manual has been prepared to assist you in the
operation, safe use and care of your outboard.
All of us at Mercury Marine took pride in building your outboard
and wish you many years of happy and safe boating.
Again, thank you for your confidence in Mercury Marine.
EPA Emissions Regulations
Outboards sold by Mercury Marine in the United States are
certified to the United States Environmental Protection
Agency as conforming to the requirements of the regulations
for the control of air pollution from new outboard motors. This
certification is contingent on certain adjustments being set to
factory standards. For this reason, the factory procedure for
servicing the product must be strictly followed and, wherever
practicable, returned to the original intent of the design.
Maintenance, replacement, or repair of the emission
control devices and systems may be performed by any
marine engine repair establishment or individual.
Engines are labeled with an Emission Control Information
decal as permanent evidence of EPA certification.
The engine exhaust from this product contains chemicals
known to the state of California to cause cancer, birth defects
or other reproductive harm.
WARNING
!
i

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Warranty Information
Transfer of Warranty
Details on how to transfer the limited warranty to a subsequent purchaser.
Transfer of Product Protection Plan
Procedure for transferring the Product Protection Plan to a new owner within thirty days of sale.
Warranty Information
Warranty Registration US & Canada
Procedure for changing address and registering the product with Mercury Marine in the US and Canada.
Warranty Information
Outboard Limited Warranty Details
Details on what Mercury Marine warrants for new Outboard and Jet products regarding defects.
Warranty Information
Conditions for Warranty Coverage
Requirements for retail customers to obtain warranty coverage, including dealer inspection and registration.
How to Obtain Warranty Service
Steps for customers to access warranty service through authorized dealers.
Warranty Information
What is Not Covered by Warranty
Exclusions from the limited warranty, including maintenance, abuse, and specific operational issues.
Warranty Information
Disclaimers and Limitations of Warranty
Details on disclaimed implied warranties and limitations on damages.
3 Year Limited Warranty Against Corrosion
Corrosion Warranty Coverage
Coverage for products rendered inoperative by corrosion for a period of three years.
3 Year Limited Warranty Against Corrosion
Conditions for Corrosion Warranty
Requirements to maintain corrosion warranty, including use of prevention devices and routine maintenance.
Warranty Information
General Exclusions from Warranty
Common misunderstandings about warranty coverage, including minor adjustments and tune-ups.
General Information
Boater's Responsibilities
Operator's duties for correct and safe operation of the boat and its occupants.
Before Operating Your Outboard
Instructions on reading the manual and understanding safety information before operating the outboard.
General Information
Boat Horsepower Capacity
Warning about exceeding the boat's maximum horsepower rating and its consequences.
High-Speed Boat Operation
Recommendations for operating high-speed or high-performance boats unfamiliar to the user.
General Information
Remote Steering Safety Notice
Warning about improper fasteners or installation procedures for the steering link rod.
General Information
Lanyard Stop Switch Function
Explanation of the lanyard stop switch's purpose and how it works.
General Information
Protecting People in the Water
Safety advice for preventing injury to people in the water while cruising or stationary.
General Information
Passenger Safety for Pontoon and Deck Boats
Safety guidelines for passengers on pontoon and deck boats, especially regarding seating and movement.
General Information
Wave and Wake Jumping Hazards
Risks and hazards associated with operating recreational boats over waves and wakes.
General Information
Impact with Underwater Hazards
Precautions for driving in shallow water or areas with suspected underwater obstacles.
General Information
Exhaust Emissions and Carbon Monoxide
Alerts about carbon monoxide poisoning from engine exhaust and necessary ventilation.
General Information
Selecting Outboard Accessories
Guidance on choosing and installing genuine Mercury accessories and reading manuals.
Safe Boating Suggestions
Recommendations for safe boating, including flotation devices, load capacity, and maintenance checks.
General Information
Safe Boating Practices
Essential boating practices: obeying rules, proper seating, avoiding alcohol, preparing others, and watching skiers.
General Information
Recording Serial Number
Importance of recording serial number and other product information for reference and theft prevention.
General Information
25/30 Specifications
Detailed specifications for the 25M, 30M, 30EH, and 30E outboard models.
General Information
Component Identification (25/30M Models)
Diagram showing numbered components of the 25/30M outboard models.
General Information
Component Diagrams (EH Models)
Diagram showing numbered components of the EH outboard models.
Installation
Installing the Outboard Motor
Recommendation to have dealers install the outboard or follow provided instructions for self-installation.
Installation
Transom Matching and Positioning
Instructions for positioning the outboard motor on the transom and clearance requirements.
Installation
Installing the Remote Control Device
Guidance on positioning the remote control box to avoid obstructing levers and switches.
Installation
Remote Control Features Explained
Explanation of control lever positions and functions (Forward, Neutral, Reverse, Throttle).
Determining Remote Control Cable Length
Guideline for calculating the proper length for remote control cables.
Installation
Connecting Remote Control Cables to Box
Steps for connecting remote control cables to the remote control box and securing them.
Installation
Connecting Throttle and Shift Cables
Procedure for connecting the shift and throttle remote control cables to the respective arms.
Installation
Installing Remote Control Box Components
Steps for reinstalling the back panel and mounting the remote control box securely.
Installation
Connecting Cables to Engine
Connecting remote control cables to the engine and attaching cord assemblies.
Installation
Throttle and Shift Cable Connections
Detailed steps for connecting throttle and shift cables to the engine with specific notes for Neutral position.
Installation
Confirming Control Lever Operation
Instructions to confirm control lever movements (Forward, Reverse, Neutral) and throttle positions.
Installation
Attaching the Cord Assembly
Connecting the cord assembly from the remote control box to terminals through the lower motor cover.
Installation
Connecting Cables to Terminal Holder
Connecting various cables to their respective terminals at the cable terminal holder.
Attaching the Steering Link Rod
Steering Link Rod Assembly Components
Illustration and description of parts used for assembling the steering link rod.
Battery Installation
Battery Mounting and Connections
Requirements for battery rating, cable connections, and important safety precautions during charging.
Installation
Propeller Selection Guide
Guidance on selecting propellers for optimal performance based on boat type and operating conditions.
Transporting
Trailering Boat and Outboard
Instructions for trailering boats with outboards, including tilt lock and ground clearance considerations.
Removing the Outboard Motor
Steps for safely removing the outboard motor from the hull, including draining water.
Transporting
Transporting Portable Fuel Tanks
Safety warnings and procedures for transporting portable fuel tanks, covering manual and auto-venting types.
Fuel & Oil
Fuel Recommendations
Guidelines for using appropriate gasoline, including octane ratings and oxygenated fuels.
Fuel & Oil
Alcohol in Gasoline and Fuel System Effects
Adverse effects of alcohol in gasoline on fuel system components and storage recommendations.
Recommended Engine Oil
Specification for recommended 2-cycle engine oil, emphasizing NMMA certified TC-W3.
Fuel & Oil
Mixing Fuel and Oil Ratios
Instructions and chart for mixing gasoline and oil ratios (25:1 and 50:1) for break-in and normal use.
Filling Fuel Tanks Safely
Safety precautions and procedures for filling fuel tanks, including stopping the engine and avoiding sparks.
Features & Controls
Remote Control Features Overview
Description of the Mercury Precision or Quicksilver remote control features and functions.
Tilting the Outboard Up
Procedure for tilting the outboard motor upwards using the reverse lock lever.
Features & Controls
Tilting the Outboard Down
Procedure for tilting the outboard motor downwards and engaging reverse lock.
Shallow Water Running Position
How to set the outboard to shallow water running position to avoid hitting bottom.
Features & Controls
Adjusting Engine Trim
How to adjust engine trim for optimal cruising by maintaining the anti-ventilation plate parallel to the water.
Features & Controls
Adjusting Steering Friction
How to adjust steering friction using the steering co-pilot for preference.
Features & Controls
Trim Tab Adjustment for Steering Torque
How to adjust the trim tab to compensate for propeller steering torque and reduce unequal steering effort.
Operation
Pre-Starting Checklist
Essential checks before starting the engine, covering safety, fuel, passengers, and navigation.
Operating in Freezing Temperatures
Precautions for operating the outboard in freezing or near-freezing temperatures to prevent damage.
Operating in Saltwater or Polluted Water
Recommendation to flush the outboard with fresh water after use in saltwater or polluted water.
Operation
Operating at High Elevations
Considerations for operating at high elevations, including potential need for carburetor jet changes.
Engine Break-in Procedure
Detailed 10-hour engine break-in procedure with specific running conditions and throttle settings.
Operation
Starting the Engine Preparations
Steps to prepare for starting the engine, including installing the fuel connector and loosening the air vent screw.
Operation
Fueling the Carburetor and Shifting
Procedure for fueling the carburetor using the primer valve and setting the shift lever for starting.
Operation
Choke Operation and Key Insertion
Instructions for using the choke knob and inserting the key for starting the engine.
Operation
Setting the Lanyard Stop Switch
Instructions to connect the lanyard stop switch to the body for safety and ensure the engine shuts down if disconnected.
Operation
Starting the Engine with Rewind Starter
Procedure for starting the engine using the rewind starter, including pulling the rope.
Operation
Starting the Engine with Starter Button/Key
Instructions for starting the engine using the starter button (tiller models) or key (remote models).
Operation
Engine Warm-Up Procedure
Importance and procedure for warming up the engine at low speed for about three minutes before cruising.
Operation
Gear Shifting Procedure (Forward)
Instructions for shifting the outboard into Forward gear, emphasizing slowing down RPM before shifting.
Operation
Gear Shifting Procedure (Reverse)
Instructions for shifting the outboard into Reverse gear for both remote and tiller handle models.
Operation
Stopping the Engine
Procedures for stopping the engine using the stop switch or lock for both tiller and remote control models.
Operation
Emergency Engine Starting
Procedure for starting the engine using a spare starter rope if the system fails.
Operation
Emergency Starting with Pull Grip
Using a socket wrench as a pull grip for emergency engine starting, with safety warnings.
Maintenance
Outboard Care and Maintenance Schedule
Importance of periodic inspections and maintenance for optimal condition and safety. Recording maintenance.
Selecting Replacement Parts
Recommendation to use genuine Mercury Precision or Quicksilver replacement parts and lubricants.
EPA Regulations Compliance
Information on EPA certification for emissions control and servicing requirements for emission control devices.
Maintenance
Emission Certification Label
Details about the emission certification label showing emission levels and engine specifications.
Owner Responsibility for Emissions
Owner's duty to perform routine maintenance and not modify the engine to alter emissions.
Inspection and Maintenance Before Each Use
Checks to perform before each use: lanyard stop switch, fuel system, transom tightness, and steering.
Maintenance
Maintenance Checks After Each Use
Tasks to perform after each use: flushing cooling system, washing exterior, and flushing exhaust outlet.
Maintenance
Maintenance Every 100 Hours or Yearly
Lubrication, spark plug inspection, fuel filter check, carburetor adjustments, and corrosion anode checks.
Maintenance
Maintenance Every 300 Hours or Three Years
Replacement of water pump impeller and referring to storage procedures.
Flushing the Cooling System
Procedure for flushing internal water passages with fresh water after use in salt or polluted water.
Maintenance
Top Cowl Removal and Installation
Steps for safely removing and installing the top cowl of the outboard motor.
Maintenance
Battery Inspection
Periodic inspection of the battery to ensure proper engine starting capability.
Fuel System Inspection and Cleaning
Inspection of fuel lines, primer bulb, and engine fuel filter for damage or sediment. Cleaning procedures.
Maintenance
Fuel Tank Cleaning
Procedure for cleaning the fuel tank to prevent engine trouble caused by water or dirt.
Maintenance
Fuse Replacement
Procedure for replacing a blown fuse in the electric starting circuit and locating the cause of overload.
Corrosion Control Anode Function
Explanation of the corrosion control anode's role in protecting the outboard from galvanic corrosion.
Maintenance
Anode Inspection and Replacement
Importance of inspecting and replacing the anode before it is completely eroded for continued corrosion protection.
Propeller Replacement Procedure
Safety warnings and steps for removing and replacing the outboard propeller.
Maintenance
Removing the Propeller
Steps for safely removing the propeller, including shifting to neutral and removing spark plug leads.
Maintenance
Installing the Propeller
Procedure for installing the propeller, including applying lubricant and tightening the propeller nut to specified torque.
Maintenance
Spark Plug Inspection and Replacement
Procedure for inspecting, replacing, and gapping spark plugs, with warnings about damaged boots.
Maintenance
Lubrication Points and Intervals
Important lubrication points and recommended maintenance intervals based on hours or months of use.
Maintenance
Gearcase Lubrication
Checking for water in gearcase lubricant and examining magnetic end for metal particles.
Maintenance
Changing Gear Oil
Step-by-step procedure for draining and refilling the gearcase lubricant.
Maintenance
Submerged Outboard Emergency Procedures
Immediate measures to take on a submerged outboard to minimize internal corrosion damage.
Storage
Storage Preparation
Major considerations for preparing the outboard for out-of-season or prolonged storage to prevent damage.
Fuel System Preparation for Storage
Instructions for preparing the fuel system with treated fuel to prevent varnish and gum formation.
Storage
Protecting External Outboard Components
Lubricating components, touching up paint, and spraying corrosion guard on external metal surfaces.
Protecting Internal Engine Components
Procedure for protecting internal engine components using storage seal and ensuring fuel system readiness.
Storage
Positioning Outboard for Storage
Instructions for storing the outboard in an upright position to allow water to drain, preventing freezing damage.
Battery Storage Recommendations
Guidelines for storing the battery, including checking water level and recharging.
Troubleshooting
Starter Motor Not Cranking
Possible causes and solutions if the starter motor will not crank the engine on electric start models.
Engine Will Not Start
Common reasons why the engine fails to start, including fuel issues, ignition problems, and starting procedure errors.
Troubleshooting
Engine Runs Erratically
Possible causes for erratic engine running, such as fouled spark plugs or incorrect setup.
Performance Loss Issues
Factors contributing to performance loss, including propeller issues, load distribution, and boat bottom condition.
Battery Will Not Hold Charge
Troubleshooting for batteries that do not hold charge, covering connections, electrolyte level, and electrical accessories.
Associated Parts
Service Tools and Spare Parts
List of associated service tools, spare parts, and other necessary items with their quantities and descriptions.
Accessories
Optional Accessories Overview
Illustrations and descriptions of optional accessories such as speedometers, fuel meters, and tachometers.
Accessories
Turnbuckle Plates and Steering Link Assemblies
Diagrams and components for turnbuckle plates and steering link assemblies.
Accessories
Twin Remote Control Box Kit Components
Components and installation details for the twin remote control box kit.
Accessories
Clutch Lever Reverse Lock Kit
Diagram of the clutch lever reverse lock kit components.
Wiring Diagrams
Main Wiring Diagram Components
Numbered components and their descriptions for the main wiring diagram.
Wiring Diagrams
Wiring Diagram Component List
Detailed list of components referenced in the wiring diagrams, including optional items.
Wiring Diagrams
Alternative Wiring Diagram Components
Numbered components and their descriptions for an alternative wiring diagram.
Wiring Diagrams
Alternative Wiring Diagram Component List
List of components for an alternative wiring diagram, including optional starter and battery components.
Wiring Diagrams
Remote Control Box Wiring Diagram
Wiring diagram specifically for the remote control box, showing connections and switches.
Wiring Diagrams
Remote Control Box Wiring Component List
List of components for the remote control box wiring diagram, including neutral switch, main switch, and stop switch.
Owner Service Assistance
Local Repair Service Recommendations
Advice to return outboard to local authorized dealer for factory-trained service and genuine parts.
Service Away from Home
How to obtain service when away from the local dealer, including contacting nearest dealer or Mercury Marine Service Office.
Parts and Accessories Inquiries
Directing inquiries for genuine replacement parts and accessories to the local authorized dealer.
Service Assistance Steps
Steps for obtaining assistance for problems, including contacting dealership management and Mercury Marine Service Office.
Owner Service Assistance
Information Needed for Service Assistance
Required information for Mercury Marine Service Office, including name, address, model, serial number, and problem description.
Owner Service Assistance
Mercury Marine Service Offices: United States
Contact information (phone, fax, website) for Mercury Marine in the United States.
Mercury Marine Service Offices: Canada
Contact information (phone, fax) for Mercury Marine Ltd. in Canada.
Mercury Marine Service Offices: Australia & Pacific
Contact information (phone, fax) for Mercury Marine Australia.
Mercury Marine Service Offices: Europe, Middle East, Africa
Contact information (phone, fax) for Marine Power - Europe, Inc.
Mercury Marine Service Offices: Mexico, Central America, South America, Caribbean
Contact information (phone, fax) for Mercury Marine in Miramar, Florida, USA.
Owner Service Assistance
Mercury Marine Service Offices: Japan
Contact information (phone, fax) for Mercury Marine - Japan.
Mercury Marine Service Offices: Asia, Singapore
Contact information (phone, fax) for Mercury Marine Singapore.
Maintenance Log
Maintenance Log Entries
Template to record all maintenance performed on the outboard, including date, work done, and engine hours.

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