This comprehensive Service Repair Manual covers Mercury Mercruiser #2 Stern Drive Units and Marine Engines, encompassing production model years 1974 through 1977. It provides detailed information, step-by-step instructions, and clear illustrations to guide you through every aspect of service and repair. This manual is an invaluable resource for anyone who wants to understand and maintain these engines, allowing you to perform repairs and troubleshooting with confidence.

Within its pages, you'll find detailed specifications, wiring diagrams, and numerous real-life photographs to illustrate procedures. This manual covers all aspects of the Mercury Mercruiser #2 engine, from general information and tune-up procedures to engine removal and installation, electrical systems, fuel systems, drive systems, accessories, and troubleshooting.

The manual covers a wide range of models, including:

**MerCruiser Stern Drive Engines (MCM):**
- MCM 120 - S/N: 3770650 - 4952700
- MCM 140 - S/N: 3771645 - 4918569
- MCM 165 - S/N: 3774865 - 4884834
- MCM 470 - S/N: 4886619 and Below
- MCM 888 - S/N: 3777490 and Above
- MCM 898 - S/N: 4887829 and Below
- MCM 225 S (Ford) - S/N: All
- MCM 225TR (Ford) - S/N: 3779775 and Above
- MCM 228 4902304 and Below
- MCM 228TR - S/N: All
- MCM 233 - S/N: All
- MCM 250 (350 CID) - S/N: 4768000 and Above
- MCM 255 (Ford) - S/N: 3838788 and Above
- MCM 25 (GM) - S/N: 4175500 and Above
- MCM 280 - S/N: All
- MCM 330 - S/N: 4889679 and Below
- 400 Jet - S/N: All

**Transom Assembly & Stern Drive Units:**
- MC 120/140 - S/N: 3780850 - 4893634
- MC 165 - S/N: 3780850 - 4890459
- MC 470 - S/N: 4893834 and Below
- MC 888 - S/N: 3784375 and Above
- MC 225 S - S/N: All
- MC 233 - S/N: All
- MC 898/228 - S/N: 4898729 and Below
- MC 250 - S/N: All
- MCTR - S/N: 3787240 - 5009866
- MCTRS - S/N: 4895289 and Below
- MC Jet Drive - S/N: All

**MerCruiser Inboard Engines (MIE):**
- MIE 198 - S/N: All
- MIE 225 (Ford) - S/N: 3750508 and Above
- MIE 228 - S/N: 4931099 and Below
- MIE 233 - S/N: All
- MIE 255 (Ford) - S/N: 3839488 and Above
- MIE 255 ( G.M.) - S/N: 4924564 and Below
- MIE 330 - S/N: 4890179 and Below
- MIE 350 - S/N: All

The manual is organized into logical sections for easy navigation. You'll find comprehensive information on:

- **General Information:** Covers basic information, tune-up procedures, and lubrication.
- **Removal, Installation, and Alignment:** Provides detailed instructions for removing, installing, and aligning various components.
- **Electrical System:** Explains the starting, ignition, alternator, and instrumentation systems, including wiring diagrams.
- **Fuel Systems:** Covers fuel pumps and carburetors in detail.
- **Engine:** Provides in-depth information on engine mechanics for different models, including in-line, V-8 Ford, V-8 GM, and the 470 model.
- **Drive Systems:** Covers the MerCruiser I-Drive, II-TR, and II-TRS drive units, as well as direct drive transmissions.
- **Accessories:** Includes information on power trim, steering, remote controls, cooling, and general accessories.
- **Specifications:** Provides a wealth of technical specifications for tune-up, internal engine components, torque specs, and propeller characteristics.
- **400 Jet Drive:** Offers dedicated information on the 400 Jet Drive system.
- **Troubleshooting:** Provides guidance for diagnosing and resolving common issues.