1974-1977 Mercury Mercruiser #2 Stern Drive Units and Marine Engines Service Repair Manual PDF
Vehicle Description:
The 1974-1977 Mercury Mercruiser #2 Stern Drive Units and Marine Engines are renowned for their exceptional performance and reliability, making them ideal for various marine applications. These robust and versatile powertrains boast an array of advanced features that deliver optimal efficiency, durability, and ease of maintenance.
**Stern Drive Units:**
The #2 Stern Drive Units are meticulously engineered to provide superior handling and maneuverability in both shallow and deep waters. Their compact design allows for easy installation in a wide range of boats, while their durable construction ensures longevity in harsh marine environments.
* **Upper Unit:**
* Precision-machined aluminum housing for enhanced rigidity and corrosion resistance
* High-efficiency water pump for optimal engine cooling and propeller lubrication
* Easy-access service points for simplified maintenance and inspection
* **Lower Unit:**
* Durable cast aluminum gear case with integrated cavitation plate for reduced drag
* High-strength stainless steel propeller shaft for reliable power transmission
* Sacrificial zinc anode to protect against galvanic corrosion
**Marine Engines:**
The #2 Stern Drive Units are paired with a range of Mercury Mercruiser marine engines, renowned for their power, fuel efficiency, and longevity. These engines are meticulously designed and built to withstand the demanding conditions of marine environments.
* **V6 and V8 Options:**
* Available in both V6 and V8 configurations to meet varying power requirements
* High-compression cylinder heads and advanced ignition systems for increased horsepower and torque
* **Multi-Port Fuel Injection (MPFI):**
* Precise fuel delivery for optimized combustion, resulting in reduced fuel consumption and improved emissions
* **Closed-Cooling System:**
* Isolates engine coolant from seawater, preventing corrosion and extending engine life
* **High-Output Alternator:**
* Provides ample electrical power for onboard accessories and charging batteries
**Additional Features:**
* **Power Trim System:**
* Allows for precise adjustment of the stern drive angle, optimizing boat performance and efficiency
* **Tilt Function:**
* Facilitates easy trailer loading and shallow-water operation
* **Integrated Shift and Throttle Controls:**
* Ergonomic design for intuitive and effortless control of the boat
With their robust construction, advanced features, and proven reliability, the 1974-1977 Mercury Mercruiser #2 Stern Drive Units and Marine Engines have earned a reputation as exceptional powertrains for marine enthusiasts worldwide.
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 COVERED:
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
SECTIONS INCLUDE:
1 - GENERAL INFORMATION
A - General Information
B - Tuneup
C - Lubrication
2 - REMOVAL-INSTALLATION-ALIGNMENT
A - MerCruiser 12G-14G-165-470
B - MerCruiser V-8 I-Drive Models
C - MerCruiser II-TR and·II-TRS Stern Drive
D - General Installation
3 - ELECTRICAL SYSTEM
A - Starting System
B - Ignition System
C - Alternator System
D - Instrumentations
E - Wiring Diagrams
4 - FUEL SYSTEMS
A - Fuel Pumps
B - Carburetors
5 - ENGINE
A - Engine Mechanical, In-Line
B - Engine Mechanical, V-8 Ford
C - Engine Mechanical, V-8 GM
D - Engine Mechanical, 470 Model
6 - DRIVE SYSTEMS
A - MerCruiser I-Drive Unit
B - MerCruiser II-TR Drive Unit
C - MerCruiser II-TRS Drive Unit
D - MerCruiser Direct Drive Transmission
E - Direct Drive II TR & II-TRS Transmission
7 - ACCESSORIES
A - Power Trim
8 - Steering System
C - Remote Controls
D - Cooling
E - General Accessories
8 - SPECIFICATIONS
A - Tune-Up and General
B - Internal Engine
C - Torqure Specs
D - Propeller Char
9 - 400 JET DRIVE
10 - TROUBLESHOOTING
