This factory service manual provides detailed service information, step-by-step repair instruction, and maintenance specifications for your MerCruiser GM 4 Cylinder Marine Engines.
This comprehensive overhaul and repair manual is designed as a "Service Guide" for MerCruiser models listed. It provides specific information including procedures for disassembly, assembly, inspection, and adjustment, to enable dealers and service mechanics to keep the MerCruiser in top operating condition. The procedures are supplemented with photos and illustrations.
All Official Mercury Marine Manuals for MerCruiser Sterndrives and Inboards include easy to follow, step-by-step illustrated procedures based on the complete dismantling, repair, and assembling of boat motors. From the simplest repair to complex procedures, these manuals give you everything you need to do the job with confidence.
Models Covered in This Manual
MODEL - SERIAL NUMBER
MCM 120 MR - S/N: 6853914-0A492055
MCM 120 Alpha I - S/N: OA492056-08531853
MCM 2.5L - S/N: OC856450 and Above
MCM 140 MR - S/N: 6852270-0A484072
MCM 140 Alpha I - S/N: OA484073-08450800
MCM 3.0L - S/N: OC856450 and Above
Sea Ray 3.0L - S/N: 08787205-8917530
NOTICE
MCM 2.5L MCM3.0L - Same as MCM 120.
Sea Ray 3.0L-Same as MCM 140 (Later Models are rated at 130 HP and have 9.2:1 Compression ratio.)
Service Manual Outline
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
Language: English
File Format: .PDF
Delivery method: Download
This manual will come in .PDF format, so it's extremely easy to move around with you from computer to computer. Many mechanics purchase electronics manuals like this and use a laptop near them while doing maintenance! If you don't have a laptop, no problem! Just print out the pages of the manual that you need and you've got a hard copy in front of you while doing your work! Simply throw it away when you're finished! It's much easier and quicker than having to deal with a book!
