1985-1989 Mercury Mercruiser #10 MARINE ENGINES GM 4-Cylinder Workshop Service Repair Manual

Go ahead to take this service manual. Please contact to us if with any problems..
This manual can be used by anyone from a first time owner/amateur to a professional technician. Easy to read type, And give you all the information needed to do the procedure correctly. Keep this shop manual handy and use it often. Performing routine, preventive maintenance will save you time & money by helping to prevent premature failure and unnecessary repairs.


Models and Serial Number
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

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.)


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 and Exhaust
A – Seawater Cooled Models
B – Closed Cooled Models
C – Exhaust Manifolds/Elbows

SECTION 7 – Power Steering
A – Power Steering

File Format: PDF
Compatible: All Versions of Windows & Mac
Language: English
Requirements: Adobe PDF Reader

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