Mercury 175 Pro XS OptiMax

eng i
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.
!
WARNING
The engine exhaust from this product contains chemicals
known to the state of California to cause cancer, birth
defects or other reproductive harm.
© 2012 Mercury Marine 135/150/175/150-175 Pro XS OptiMax 90-8M0055670 311

Mercury 175 Pro XS OptiMax Specifications

General

Horsepower	175 hp
Gear Ratio	1.75:1
Recommended Fuel	87 Octane
Starting	Electric
Fuel System	OptiMax Direct Fuel Injection
Alternator Output	60 Amps
Shaft Length	20 in / 25 in

Summary

Warranty Information

Warranty Registration

Details on how to register your product to be eligible for warranty coverage.

Outboard Limited Warranty

Covers what Mercury Marine warrants for new outboard products regarding defects.

3 Year Limited Warranty Against Corrosion

Warranty Coverage and Exclusions

Clarifies what is covered by warranty and lists general exclusions.

U.S. EPA Emissions Limited Warranty

California Emissions Limited Warranty

General Information

Propeller Selection

Information on choosing the correct propeller for optimal boat performance.

Operation

Pre-Starting Check List

Essential checks to perform before starting the engine for safe operation.

Engine Break-In Procedure

Crucial steps for breaking in the engine to ensure performance and longevity.

Starting the Engine

Step-by-step instructions for starting the outboard engine.

Maintenance

Inspection and Maintenance Schedule

Detailed schedule of checks and maintenance required before each use.

Flushing the Cooling System

Procedure for flushing internal water passages after use in salt or polluted water.

Spark Plug Inspection and Replacement

Instructions for inspecting, gapping, and replacing spark plugs.

Corrosion Control Anode

Battery Inspection

Propeller Replacement

Step-by-step guide for safely removing and installing a propeller.

Gearcase Lubrication

Procedure for checking and changing gearcase lubricant, including inspection for water.

Storage

Storage Preparation

Key considerations for protecting the outboard from rust, corrosion, and freezing.

Protecting Internal Engine Components

Protecting External Outboard Components

Troubleshooting

Starter Motor Will Not Crank the Engine

Lists possible causes and solutions when the starter motor does not crank.

Engine Will Not Start

Identifies common reasons and troubleshooting steps for a non-starting engine.

Engine Runs Erratically

Performance Loss

Battery Will Not Hold Charge

Outboard Installation

Boat Horsepower Capacity

Start in Gear Protection

Fuel System

Lifting the Outboard

Steering Link Rod Fasteners

Determining Recommended Outboard Mounting Height

Guidance and diagrams for setting the optimal outboard mounting height.

Fastening the Outboard to the Transom

Instructions and torque specifications for securing the outboard to the transom.

Electrical, Hoses, and Control Cables

Remote Wiring Harness

Propeller Installation

Trim In Pin