Table of Contents
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Table of Contents
Related Manuals for Mercury 8.1 S Horizon
Summarization of Contents
Identification Record
Engine Model and Horsepower
Record engine model and horsepower details.
Transmission Model
Record transmission model and gear ratio.
Propeller Number
Record propeller details like pitch and diameter.
Hull Identification Number (HIN)
Record the Hull Identification Number (HIN).
Boat Manufacturer
Record the boat manufacturer and model.
Engine Serial Number
Record the engine's serial number.
Transmission Serial Number
Record the transmission's serial number.
Boat Model
Record the boat model name.
Purchase Date
Record the date of purchase.
Length
Record the boat's length.
Serial Numbers
Details on manufacturer's keys for engineering information.
Welcome!
Warranty Message
Important message regarding the limited warranty from Mercury Marine.
Warranty Information
Owner Warranty Registration
Procedure for registering ownership and warranty in US and Canada.
Warranty Policies
Mercury MerCruiser Limited Warranty - Gasoline Engines
Details of the limited warranty for gasoline engines in US and Canada.
Mercury MerCruiser International Warranty - Gasoline Engines
Details of the international limited warranty for gasoline engines.
3 Year Limited Warranty Against Corrosion Failure
Details of the 3-year limited warranty against corrosion failure.
Warranty Coverage
Warranty Exclusions
List of conditions and services not covered by the warranty.
Transferable Warranty
Direct Sale By Owner
Procedure for transferring warranty in direct sales between owners.
Mercury Product Protection Plan
Details of the optional Mercury Product Protection Plan.
Read This Manual Thoroughly
Safety Alerts and Warnings
Explanation of warning, caution, and important message indicators.
General Information
Lanyard Stop Switch
Explanation of the lanyard stop switch function and safety.
Safe Boating Suggestions
Nautical Rules and Safety Courses
Information on obeying nautical rules and taking safety courses.
Safety Equipment and Maintenance Checks
Checklist of safety equipment and importance of maintenance.
Safe Operating Practices
Guidelines for passenger boarding, PFD use, and boat loading.
Exhaust Emissions
Carbon Monoxide Poisoning Alert
Warning about carbon monoxide dangers and symptoms.
Ventilation and Fume Removal
Importance of proper ventilation to remove exhaust fumes.
High-Speed Boat Operation
Weight Distribution
How weight distribution affects boat performance and handling.
Boat Bottom Condition
Importance of a clean, smooth boat bottom for performance.
Protecting People In The Water
Safety When People Are In Water
Precautions to take when people are in the water near the boat.
Conditions Affecting Operation
Weight Distribution
How weight distribution affects boat performance and handling.
Boat Bottom Condition
Importance of a clean, smooth boat bottom for performance.
Propeller Selection
Propeller Selection Guidelines
Guidelines for selecting the correct propeller for optimal performance.
Important Information
Operation and Maintenance
Operator responsibilities for safety, maintenance, and dealer checks.
Freezing Temperature Operation
Drain Plug and Bilge Pump
Importance of checking drain plug and bilge pump for water collection.
Attention After Submersion
Immediate steps required after submersion to prevent damage.
Launching and Boat Operation Care
Launching Caution
Cautionary advice regarding launching from steep ramps and sudden stops.
Stolen Power Package
Procedure to follow if the power package is stolen.
Replacement Service Parts
Importance of using genuine parts and specific marine engine requirements.
Do-It-Yourself Maintenance
DIY Maintenance Precautions
Advice and precautions for performing DIY maintenance on complex machinery.
Multiple EFI Engine Battery Precautions
Battery Management and Precautions
Battery management for multi-engine EFI systems.
20-Hour Break-In Period
After Break-In Period
Recommendations to extend the life of the power package after break-in.
End of First Season Checkup
Schedule for dealer checkup at end of first season or 100 hours.
Operation
Instrumentation
Explanation of typical boat instruments and their functions.
Remote Controls
Single Control Handle
Operation of single control handle for shift and throttle.
Dual Control Handles
Operation of dual control handles for shift and throttle.
Neutral Release Lever
Function of the neutral release lever.
Trim/Tilt Button
Operation of trim/tilt buttons if equipped.
Lanyard Stop Switch
Function and safety of the lanyard stop switch.
Throttle Friction Adjustment
Adjusting throttle friction for control console.
Ignition Key Switch
Operation of the ignition key switch (OFF, ON, START).
Throttle Only Button
Use of the throttle only button for starting assistance.
Starting, Shifting and Stopping
Before Starting Engine
Pre-start checks including bilge blower operation and ventilation.
Starting Procedures
Step-by-step guide for starting the engine in various conditions.
Shifting and Stopping
Procedures for shifting into gear and stopping the engine.
Specifications
Fuel Recommendations
Recommended fuel types, octane ratings, and handling of oxygenated/alcohol fuels.
Fuel Ratings
Reformulated Gasolines
Acceptability of reformulated (oxygenated) gasolines in the USA.
Gasolines Containing Alcohol
Adverse effects of alcohol in gasoline and fuel system compatibility.
Engine Specifications
350 Mag MPI Horizon Specifications
Detailed specifications for the 350 Mag MPI Horizon engine.
8.1 S Horizon Specifications
Detailed specifications for the 8.1 S Horizon engine.
Maintenance
Maintenance Aids
List of recommended fluids and surface treatments for maintenance.
Fluid Capacities
Approximate fluid capacities for engine oil, cooling systems, and transmission.
Transmission
Velvet Drive Transmission
Fluid type and capacity for Velvet Drive transmissions.
ZF (Hurth) Transmission
Fluid type and capacity for ZF (Hurth) transmissions.
Checking Fluid Levels
Checking Crankcase Oil
Procedure for checking and adding crankcase oil.
Checking Transmission Fluid
Procedure for checking transmission fluid levels.
Checking Engine Coolant
Procedure for checking and adding engine coolant.
Changing Fluids
Changing Crankcase Oil and Filter
Procedure for changing engine oil and oil filter.
Lubrication
Throttle Cable Lubrication
Lubrication points for throttle cables.
Shift Cable Lubrication
Lubrication points for shift cables and levers.
Miscellaneous Maintenance
Battery Maintenance
Precautions and maintenance for lead-acid batteries.
General Inspection and Maintenance
Regular inspection of the power package for potential problems.
Cold Weather or Extended Storage
Power Package Lay Up
Recommended procedures for preparing the power package for storage.
Single Point Drain System
Manual Drain System
Procedure for draining the engine using the manual drain system.
Troubleshooting
Starter Motor Issues
Troubleshooting for starter motor not cranking or cranking slow.
Engine Start Issues
Troubleshooting for engine not starting or being hard to start.
RPM Decrease Issues
Troubleshooting for engine RPM decreasing or not rising above 2000 RPM.
Engine Runs Rough or Misfires
Poor Performance
Troubleshooting for general poor performance issues.
Excessive Engine Temperature
Insufficient Engine Temperature
Troubleshooting for engine running too cool.
Low Engine Oil Pressure
Troubleshooting for low engine oil pressure.
Transmission Fluid Issues
Battery Charging Issues
Troubleshooting for batteries that will not charge.
Remote Control Issues
Troubleshooting for remote control binding or unusual sounds.
Owner Service Assistance
Local Repair Service
Guidance on using local authorized dealers for service.
Service Away From Home
How to find service when away from your local dealer.
Parts and Accessories Inquiries
Information on ordering genuine Mercury parts and accessories.
Resolving A Problem
Contacting Your Dealer
Steps to resolve issues by first contacting the dealership.
Contacting Mercury Marine Service
Steps to contact Mercury Marine Service for unresolved issues.
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