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Mercury V8 300

Mercury V8 300
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DIAGNOSTIC
MANUAL
V6 175
/
200
/
225 V8 200
/
225
/
250
/
300 FourStroke Outboard
www.brunswick-marine.com
Parc Industriel de Petit-Rechain
B-4800 Verviers, Belgium
90-8M0146617 JULY 2018
90-8M0146617
JULY 2018
www.mercurymarine.com.au
41-71 Bessemer Drive
Dandenong South, Victoria 3175 Australia
www.mercurymarine.com
P.O. Box 1939
Fond du Lac, WI 54936-1939 USA
© Mercury Marine. All rights reserved.
Printed in U.S.A.
DIAGNOSTIC MANUAL
V6 175
/
200
/
225
V8 200
/
225
/
250
/
300
FourStroke
Outboard
Starting serial number 2B529482

Table of Contents

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Mercury V8 300 Specifications

General IconGeneral
Horsepower300 HP
Displacement4.6 L
Full Throttle RPM Range5200-6000 RPM
Fuel Induction SystemElectronic Fuel Injection (EFI)
Gear Ratio1.75:1
StartingElectric
Shaft Length20 in, 25 in, 30 in
Warranty3-Year Limited Warranty
Engine TypeV8
Fuel Type87 Octane
Bore x Stroke92 mm x 86 mm

Summary

PCM 112

PCM 112 Important Information and Pinouts

Covers critical PCM 112 details, including connector pin assignments.

General Troubleshooting and CDS G3

Troubleshooting with the Computer Diagnostic System (CDS G3)

Guides on connecting and using the CDS G3 diagnostic tool.

CDS G3-Live Data

Details how to interpret real-time engine data using the CDS G3.

CDS G3-PCM 112 Freeze Frame Data

Explains using freeze frame data to capture engine state at fault occurrence.

Fault Codes

Fault Codes

Lists and explains Mercury universal fault codes (UFC) for PCM 112 engines.

Sensors, Actuators, Relays, and Accessories

Sensors

Provides detailed info on identifying, testing, and replacing engine sensors.

Fuel System

Troubleshooting and Diagnostics

Provides procedures for diagnosing and troubleshooting fuel system components.

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