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Mercury 50 4-Stroke User Manual

Mercury 50 4-Stroke
134 pages
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Welcome Aboard!
Proper care and maintenance is an important part in keeping
your Mercury Product operating at peak efficiency for
maximum performance and economy. The enclosed Owner's
Registration Card is your key to trouble‑free family fun. Refer
to your Operation and Maintenance Manual for full details
of your warranty coverage.
Details of your nearest dealer can be found on
www.marinepower.com where country maps and full
contact information are displayed.
Is your engine properly registered for warranty purpose?
Please check on www.marinepower.com. If necessary,
please contact your local dealer.
Declaration of Conformity
Manufacturer:
Mercury Marine
W6250 Pioneer Road
P.O. Box 1939
Fond du Lac, WI 54935-1939 USA,
Authorized Representative:
Marine Power Europe, Inc.
Parc Industriel de Petit-Rechain
B-2800 Verviers - Belgium,
Recreational Craft Directive: 2003/44/EC amending 94/25/EC
Applicable Requirement Standards Applied
Owner's manual (A.2.5) EN ISO 10240:2004
Handling characteristics (A.4) EN ISO 8665:1995
Outboard engines starting (A.5.1.4) EN ISO 11547:1995
General steering system (A.5.4.1)
ABYC P‑17; EN ISO
10592:1995
Exhaust emission requirements (B.2) EN ISO 8178‑1:1996
Owner's manual (B.4) EN ISO 8665:1995
Noise emission levels (C.1) EN ISO 14509:2000
Module used for exhaust emission assessment: Module H;
Certification No. RCD‑H‑2
Module used for noise emission assessment: Module H;
Certification No. RCD‑H‑2
© 2007 Mercury Marine 40/50/60 4-Stroke 90-10223080 407

Table of Contents

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Mercury 50 4-Stroke Specifications

General IconGeneral
Engine Type4-Stroke
Horsepower50 hp
Cylinders3
Starting SystemElectric
SteeringRemote
Displacement747 cc
Fuel Induction SystemEFI
Alternator Amp18 amp
Shaft Length20 in
Full Throttle RPM Range5000-6000 RPM
WOT Range5000-6000 RPM
Fuel Tank CapacityExternal Tank Required

Summary

Warranty Information

Transfer Of Warranty

Details the process for transferring the limited warranty to a new owner.

Warranty Registration United States And Canada

Explains how to register the product for warranty in the US and Canada.

3 Year Limited Warranty Against Corrosion

Outlines the specific warranty coverage for corrosion-related issues.

Warranty Coverage And Exclusions

Clarifies what types of services and damages are covered or excluded.

General Information

Boater's Responsibilities

Defines the operator's duties for safe boat operation and occupant safety.

Lanyard Stop Switch

Explains the function and operation of the emergency engine shut-off switch.

Protecting People In The Water

Provides safety guidelines for preventing injuries to swimmers near the boat.

Exhaust Emissions

Warns about carbon monoxide poisoning and advises on ventilation.

40/50/60 4‑Stroke Specifications ‑ International

Lists technical specifications for specific outboard engine models.

Transporting

Trailering Boat/Outboard

Provides instructions and precautions for safely transporting the boat and outboard.

Fuel & Oil

Fuel Recommendations

Advises on the correct type, octane, and additives for gasoline.

Engine Oil Recommendations

Specifies the recommended oil type, viscosity, and quality for the engine.

Features & Controls

Remote Control Features

Describes the functions of the remote control unit for operating the outboard.

Warning System

Explains the audible signals from the horn and their meanings.

Power Trim and Tilt

Details how to adjust the outboard's position for optimal performance and handling.

Operation

Pre‑Starting Check List

Lists essential checks before starting the engine for safe operation.

Engine Break‑in Procedure

Outlines the critical steps for breaking in a new engine to ensure longevity.

Starting the Engine - Remote Control Models

Step-by-step guide for starting the engine using a remote control.

Gear Shifting

Explains the procedure for shifting between forward, neutral, and reverse gears.

Maintenance

Inspection and Maintenance Schedule

Provides a schedule for routine checks and servicing to ensure performance.

Flushing the Cooling System

Instructions for cleaning internal water passages after use in dirty water.

Propeller Replacement - 87.3 mm (3 - 7/16 in.) Diameter Gearcase

Detailed steps for replacing the propeller on specific gearcase models.

Spark Plug Inspection And Replacement

Guide on how to inspect, gap, and replace spark plugs for optimal ignition.

Gearcase Lubrication - For 87.3 mm (3-7/16 in.) Diameter Gearcase

Procedures for draining, checking, and refilling gearcase lubricant.

Storage

Storage Preparation

Key steps to protect the outboard during long-term storage.

Protecting Internal Engine Components

Methods to prevent corrosion and damage to internal engine parts during storage.

Battery Storage

Guidelines for safely storing and maintaining the battery during the off-season.

Troubleshooting

Engine Will Not Start

Lists common causes and solutions when the engine fails to start.

Engine Runs Erratically

Identifies potential issues causing the engine to run unevenly and how to address them.

Performance Loss

Diagnoses reasons for reduced engine performance and possible fixes.

Owner Service Assistance

Local Repair Service

Recommends using authorized dealers for expert service and genuine parts.

Service Assistance

Provides steps for obtaining help with product issues, including contacting Mercury Marine.

Outboard Installation

INSTALLING OUTBOARD

General overview and preparation for mounting the outboard onto the boat.

Drilling Outboard Mounting Holes

Instructions and tools for accurately drilling mounting holes on the transom.

Fastening the Outboard to the Transom

Details on properly securing the outboard using mounting hardware and specified torque.

STEERING LINK ROD FASTENERS

Explains the correct fasteners and procedures for the steering link rod connection.

Propeller Installation

Step-by-step guide for installing the propeller, including torque specifications.

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