This comprehensive service repair manual covers Mercury Mercruiser #01 Stern Drive Units and Marine Engines from 1963 to 1973. It includes detailed information, specifications, diagrams, and real photo illustrations to guide you through repair, diagnosing, servicing, technical maintenance, and troubleshooting procedures for your Mercury Mercruiser #01 Stern Drive Units and Marine Engines. With this manual, you can confidently identify problems and understand how to repair and maintain your equipment without the need for professional assistance, saving you time and money.

This manual covers various models including:

**MerCruiser Stern Drive Engines (MCM):**
MCM 60, MCM 80, MCM 90, MCM 110, MCM 120 (S/N: 3770649 and below), MCM 140 (6 Cyl.), MCM 140 (4 Cyl.) (S/N: 3771644 and below), MCM 150, MCM 160, MCM 165 (S/N: 3774864 and below), MCM 888 (S/N: 3777489 and below), MCM 190 (V-8), MCM 200 (6 Cyl.), MCM 215, MCM 225 (G.M.), MCM 225TR (Ford) (S/N: 3779774 and below), MCM 250 (327 CID) (S/N: 4767999 and below), MCM 255TR (Ford) (S/N: 3838787 and below), MCM 270, MCM 310, MCM 325, MCM 390.

**Transom Assembly and Stern Drive Units:**
MCO, MCI, MCTNB/C, MCINB/C E-2, MC80, MC90, MC 120 (S/N: 3780849 and below), MC 140 (S/N: 3780849 and below), MC 160, MC 165 (S/N: 3780849 and below), MC888 (S/N: 3784374 and below), MCM 215 H, MCM 215 E, MCTR (S/N: 3787239 and below), MCII, MCIII.

**MerCruiser Inboard Engines (MIE):**
MIE 30, MIE 55, MIE 215, MIE 225 (G.M.), MIE 225 (Ford) (S/N: 3750507 and below), MIE 250 (327 CID) (S/N: 4767999 and below), MIE 255 (Ford) (S/N: 3839487 and below), MIE 270, MIE 325, MIE 390.

This manual is organized into nine sections:

1. **General Information:** Provides general information, tune-up instructions, and lubrication details.
2. **Removal-Installation-Alignment:** Covers procedures for removing, installing, and aligning various components.
3. **Electrical System:** Explains the starting system, ignition system, alternator system, instrumentation, and includes wiring diagrams.
4. **Fuel Systems:** Focuses on fuel pumps and carburetors.
5. **Engine:** Detailed information on engine mechanics, including In-Line GM, In-Line 60-80-90, V-8 GM, and V-8 Ford engines.
6. **Drive Systems:** Covers the mechanics of various drive systems, including MerCruiser 60-80-90, MerCruiser I, MerCruiser II, MerCruiser 215, MerCruiser III, Direct Drive Transmission, MerCruiser II-TR Drive Unit, and MerCruiser TI-TR Transmission.
7. **Accessories:** Includes information on power tilt & trim, steering system, remote controls, cooling systems, and general accessories.
8. **Specifications:** Provides detailed specifications for all covered components.
9. **Tools:** Lists recommended tools for working on these engines.

This manual is a valuable resource for anyone who owns or works on Mercury Mercruiser #01 Stern Drive Units and Marine Engines, enabling you to perform repairs and maintenance efficiently and effectively.