This manual covers Mercruiser marine engines, specifically the GM V-8 454 CID (7.4L) and 502 CID (8.2L) models. These engines are recognized for their robust construction and reliable performance, designed to meet the demanding requirements of marine applications. Their engineering prioritizes durability and efficiency, making them a trusted choice for boat owners and operators seeking consistent power and longevity on the water.
The purpose of this comprehensive manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of your Mercruiser engine. It includes essential information on general procedures, routine maintenance schedules, diagnostic techniques, and specific repair instructions for various systems such as fuel, cooling, exhaust, and ignition. This resource is intended for owners, technicians, and mechanics to ensure optimal engine operation and longevity.
Mercruiser #23 - Marine Engines - GM V-8 454 CID (7.4L) & 502 CID (8.2L) – 1027 pages
Example of Table of Contents (Just an example ... it may not be your specific engine, but it will give you an idea as what to expect)
IMPORTANT INFORMATION
Section 1A - General Information
Section 1B - Maintenance
Section 1C - Troubleshooting
REMOVAL AND INSTALLATION ENGINE
Section 3A - 262 cid (4.3L) Engines
Section 4A - Starting Systems
Section 4B - Thunderbolt V Ignition System
Section 4C - Charging System
Section 4D - Instrumentation
Section 4E - Wiring Diagrams
FUEL SYSTEM
Section 5A - Fuel Delivery System for Carbureted Engines
Section 5B - Mercarb2 Barrel Carburetor
Section 5C - Weber 4 Barrel Carburetor
Section 5D - Sav1 Emission Fuel System with Weber 4 Barrel
Carburetor
Section 5E - Fuel Delivery System
For Electronic Fuel Injection
Section 5F - Fuel Injection Descriptions And
System Operation
Section 5G - Fuel Injection Disassembly And Reassembly
Section 5H - Fuel Injection System Troubleshooting
Section 5I - Diagnostics
COOLING SYSTEM
Section 6A - Seawater Cooled Models
Section 6B - Closed Cooled Models
EXHAUST SYSTEM
Section 7A - General
Section 7B - Manifolds, Elbows and Risers
Section 7C - Collectors
DRIVES
Section 8A - Drive Shaft
POWER STEERING SYSTEM
Section 9A - Pump and Related Components
Mercruiser #23 - Marine Engines - GM V-8 454 CID (7.4L) & 502 CID (8.2L) – 1027 pages
Example of Table of Contents (Just an example ... it may not be your specific engine, but it will give you an idea as what to expect)
IMPORTANT INFORMATION
Section 1A - General Information
Section 1B - Maintenance
Section 1C - Troubleshooting
REMOVAL AND INSTALLATION ENGINE
Section 3A - 262 cid (4.3L) Engines
Section 4A - Starting Systems
Section 4B - Thunderbolt V Ignition System
Section 4C - Charging System
Section 4D - Instrumentation
Section 4E - Wiring Diagrams
FUEL SYSTEM
Section 5A - Fuel Delivery System for Carbureted Engines
Section 5B - Mercarb2 Barrel Carburetor
Section 5C - Weber 4 Barrel Carburetor
Section 5D - Sav1 Emission Fuel System with Weber 4 Barrel
Carburetor
Section 5E - Fuel Delivery System
For Electronic Fuel Injection
Section 5F - Fuel Injection Descriptions And
System Operation
Section 5G - Fuel Injection Disassembly And Reassembly
Section 5H - Fuel Injection System Troubleshooting
Section 5I - Diagnostics
COOLING SYSTEM
Section 6A - Seawater Cooled Models
Section 6B - Closed Cooled Models
EXHAUST SYSTEM
Section 7A - General
Section 7B - Manifolds, Elbows and Risers
Section 7C - Collectors
DRIVES
Section 8A - Drive Shaft
POWER STEERING SYSTEM
Section 9A - Pump and Related Components
