This is the official service repair manual for the Mercury Mercruiser #10 MARINE ENGINES GM 4 Cylinder, covering production model years 1985-1989. It includes complete tear down and rebuild procedures, along with detailed illustrations, diagrams, wiring schematics, and specifications. The manual also provides step-by-step instructions for maintenance, troubleshooting, removal, installation, and repair of engine mechanical, electrical, fuel, cooling, exhaust, and power steering systems.
Models and Serial Numbers Covered:
MCM 120 MR→6853914 to 0A492055
MCM 120 Alpha I→0A492056 to 0B531853
MCM 2.5L→0C856450 and Above
MCM 140 MR→6852270 to 0A484072
MCM 140 Alpha I→0A484073 to 0B450800
MCM 3.0L→0C856450 and Above
Sea Ray 3.0L→0B787205 to B917530
Notice: MCM 2.5L MCM3.0L is the same as MCM 120. Sea Ray 3.0L is the same as MCM 140 (Later Models are rated at 130 HP and have 9.2:1 Compression ratio.)
Table of Contents:
SECTION 1 - Important Information
A - Important Information
B - Maintenance
C - Troubleshooting
SECTION 2 - Removal & Installation
A - 4 Cyl. 153-181 CID (2.5-3.0L)
B - Driveshaft Extension Models
SECTION 3 - Engine Mechanical
A - G.M. In-Line
SECTION 4 - Electrical Systems
A - Starting System
B - Ignition System
C - Charging Systems
D - Instrumentation
E - Electrical Kits
F - Wiring Diagrams
SECTION 5 - Fuel Systems
A - Fuel Delivery System
B - Fuel Pump
C - MerCarb 2-Barrel
SECTION 6 - Cooling & Exhaust
A - Seawater Cooled Models
B - Closed Cooled Models
C - Exhaust Manifolds/Elbows
SECTION 7 - Power Steering
A - Power Steering
Specifications:
Model Specification: Mercury Mercruiser #10 MARINE ENGINES GM 4 Cylinder
Model Year: 1985-1989
Language: English
Total Pages: 308
File Format: .PDF
Requirements: Adobe Reader
Zoom In/Out: Yes
Instant Delivery: Yes
Specifications: Fully Printable & Bookmarked
Compatible: All Versions of Windows & Mac, APP ISO, Iphone, Ipod, Android etc
This comprehensive manual is 100% complete and intact, with no missing or corrupt pages/sections. It is bookmarked and searchable for easy access to detailed illustrations, exploded diagrams, drawings, and photos guiding you through every service repair procedure. The .PDF format allows viewing, zooming, and printing on any computer, and it can be saved to a hard drive or burned to CD-ROM for convenience. Instant delivery means no shipping costs or waiting for a physical manual to arrive. Accepted payment methods include all major credit/debit cards and PayPal. This manual empowers you to perform repairs yourself and save money.
