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Mercury 25 TwoStroke User Manual

Mercury 25 TwoStroke
114 pages
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Operation
Maintenance
and
Installation
Manual
© 2017 Mercury Marine
25/30 TwoStroke
8M0133465 717 eng

Table of Contents

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Mercury 25 TwoStroke Specifications

General IconGeneral
Engine Type2-Stroke
Cylinders2
Fuel TypeGasoline
Horsepower25 HP
Starting SystemManual / Electric
Shaft Length15 in, 20 in
Fuel Induction SystemCarbureted
SteeringTiller / Remote
Alternator Output6 Amps
Weight52 kg (115 lbs)

Summary

General Information

Boater's Responsibilities

Operator's duties for safe boat operation and passenger safety.

Before Operating Your Outboard

Read manual, understand operation for safety and product care.

Boat Horsepower Capacity

Warning about exceeding maximum horsepower limits for safety.

Lanyard Stop Switch

Description and function of the lanyard stop switch for safety.

Protecting People in the Water

Safety precautions for people in the water near the boat.

Exhaust Emissions

Information about carbon monoxide poisoning and ventilation.

Fuel and Oil

Fuel Requirements

Guidelines on using the correct type and octane of gasoline.

Oil Recommendation

Recommended type of 2-cycle oil for the outboard.

Mixing Fuel and Oil

Procedures and ratios for mixing fuel and oil.

Operation

Prestarting Check List

Essential checks before starting the engine.

Engine Break-in Procedure

Steps for breaking in the new engine.

Starting the Engine

Step-by-step guide to starting the outboard engine.

Gear Shifting

Instructions for shifting gears (Forward, Neutral, Reverse).

Stopping the Engine

Procedures for safely stopping the outboard engine.

Maintenance

Inspection and Maintenance Schedule

Schedule for daily, and periodic maintenance checks.

Fuel System

Maintenance and inspection of the fuel system components.

Propeller Replacement

Step-by-step guide for replacing the propeller.

Spark Plug Inspection and Replacement

How to inspect, gap, and replace spark plugs.

Storage

Troubleshooting

Engine Will Not Start

Troubleshooting steps when the engine fails to start.

Engine Installation

Installing Outboard

Step-by-step guide for installing the outboard motor onto the transom.

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