OMC Cobra, King Cobra & Stringer Sterndrive Service Manual: 2.5L - 7.5L / 120hp - 454hp, 1964-1998
Product Gallery
Sample pages from the OMC Cobra, King Cobra & Stringer Sterndrive Service Manual: 2.5L - 7.5L / 120hp - 454hp, 1964-1998 manual
Purchase Information
1964-1998 OMC Sterndrive Service Manual: Cobra, King Cobra & Stringer Models - Technical Specifications
- Document Number / Seller:
- 25946 / Joseph Bell
- File Size:
- 79.50 MB
- File Type:
- Language:
- English
- Pages:
- 1183
- Printable:
- Yes
- Estimated Download Time:
- 1.63 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Inboard Engine (Sterndrive)
- Brand:
- OMC
- Reviewed and Approved:
- Dec 14, 2025
OMC Models and Parts Covered in this Inboard Engine (Sterndrive) Manual
Sterndrive / OMC, Outboard Marine Corporation
- 100 hp (1972–1973)
- 110 hp (1944)
- 120 hp (1965–1981)
- 140 hp (1973–1981)
- 2.5 Litre (1982 & on)
- 3.0 Litre (1981 & on)
- 3.0 HO (1991)
- V6 Engines
- 150 hp (1966)
- 153 CID 4 cyl (1986)
- 181 CID 4 cyl (1986–1998)
- 225 CID Kaiser V6 (1964–1972)
- 229 CID GMC V6 (1983 & on)
- 262 CID GMC V6 (1983–1998)
- 3.8 Litre (1983 & on)
- 4.3 Litre (1983 & on)
- V8 Engines (GM & Ford)
- 175 hp (1974–1976)
- 185 hp (1967–1968, 1978–1979)
- 190 hp (1974–1976)
- 200 hp (1979)
- 210 hp (1969–1970)
- 215 hp (1971)
- 225 hp (1972–1978)
- 230 hp (1979)
- 235 hp (1971, 1974–1976)
- 240 hp (Ford) (1970–1993)
- 245 hp (1972–1976)
- 250 hp (Ford) (1970–1993)
- 260 hp (1979)
- 302 CID (Ford) (1974–1996)
- 305 CID (GM) (1986–1998)
- 350 CID (GM) (1986–1998)
- 351 CID (Ford) (1974–1996)
- 454 CID (GM) (1970–1993)
- 5.0 Litre (1982 & on)
- 5.7 Litre (1982 & on)
Complete Manual Information
1964-1998 OMC Sterndrive Repair Manual: Cobra, King Cobra & Stringer Models
Keep your classic boat on the water with the most comprehensive service resource available. This professional-grade repair manual covers OMC Sterndrive (I/O) systems from 1964 through 1998, providing step-by-step instructions for everything from routine maintenance to complete engine and drive overhauls.
Whether you are a DIY enthusiast or a professional marine technician, this manual offers the technical depth required to service OMC's legendary powertrain systems.
Wide Model & Engine Coverage
This manual is specifically designed for OMC Sterndrive configurations, including the Stringer, Cobra, and King Cobra series. It covers a vast range of powerplants:
- Inline Engines: 100hp, 110hp, 120hp, 140hp, 2.5L, 3.0L, and 3.0 HO.
- V6 Engines: 150hp, 153 CID, 155hp, 181 CID, 225 CID (Kaiser), 229 CID, 262 CID, and 3.8L/4.3L variants.
- V8 Engines (GM & Ford): 175hp up to 454 CID (7.4L) High-Output models, including 302/351 Ford and 305/350 GM blocks (1964-1998).
Real Value for Boat Owners
Stop guessing and start fixing. This manual provides clear, actionable data that saves you time and prevents costly mistakes:
- Drive System Mastery: Full teardown and assembly guides for the Stern Drive unit, Drive Shaft Housing, and Intermediate Housing.
- Engine Tuning: Precision specs for ignition timing, carburetor adjustments, and fuel system optimization for peak performance.
- Electrical Reliability: Detailed sections on charging systems, starters, and instrumentation to solve stubborn electrical gremlins.
- Corrosion Prevention: Specialized advice on zinc anodes and cooling system maintenance to protect your investment in saltwater or freshwater environments.
Mobile-Friendly Technical Sections
Designed for easy reading on your phone or tablet while you are working in the engine bay:
Maintenance & Safety
- Essential pre-season preparation and winterization procedures.
- Propeller selection and fuel system safety protocols.
Engine & Mechanical
- Piston, ring, and rod service.
- Valve timing and oil pump installation for GMC and Ford base engines.
Drive & Steering
- Comprehensive disassembly of the lower unit.
- Remote control adjustments and steering system troubleshooting.
Technical Specifications Included
- Standard torque values for critical fasteners.
- Metric conversion tables.
- List of required special marine tools.
- Comprehensive general index for quick navigation.
Ensure your OMC Sterndrive runs reliably for years to come with the definitive 1964-1998 service guide.
Download Instructions for OMC Inboard Engine (Sterndrive) Manual
Frequently Asked Questions - OMC Inboard Engine (Sterndrive) Manual
What does this OMC manual cover?
This comprehensive service manual covers detailed repair procedures, maintenance schedules, troubleshooting guides, and technical specifications for OMC Cobra, King Cobra & Stringer Sterndrive Service Manual: 2.5L - 7.5L / 120hp - 454hp, 1964-1998. It includes information for the following models: **Sterndrive / OMC, Outboard Marine Corporation** - 100 hp (1972–1973) - 110 hp (1944) - 120 hp (1965–1981) - 140 hp (1973–1981) - 2.5 Litre (1982 & on) - 3.0 Litre (1981 & on) - 3.0 HO (1991) - V6 Engines - 150 hp (1966) - 153 CID 4 cyl (1986) - 181 CID 4 cyl (1986–1998) - 225 CID Kaiser V6 (1964–1972) - 229 CID GMC V6 (1983 & on) - 262 CID GMC V6 (1983–1998) - 3.8 Litre (1983 & on) - 4.3 Litre (1983 & on) - V8 Engines (GM & Ford) - 175 hp (1974–1976) - 185 hp (1967–1968, 1978–1979) - 190 hp (1974–1976) - 200 hp (1979) - 210 hp (1969–1970) - 215 hp (1971) - 225 hp (1972–1978) - 230 hp (1979) - 235 hp (1971, 1974–1976) - 240 hp (Ford) (1970–1993) - 245 hp (1972–1976) - 250 hp (Ford) (1970–1993) - 260 hp (1979) - 302 CID (Ford) (1974–1996) - 305 CID (GM) (1986–1998) - 350 CID (GM) (1986–1998) - 351 CID (Ford) (1974–1996) - 454 CID (GM) (1970–1993) - 5.0 Litre (1982 & on) - 5.7 Litre (1982 & on).
Is this manual suitable for beginners?
Yes, this OMC manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Inboard Engine (Sterndrive) maintenance and repair.
What file format will I receive?
You will receive this manual as a PDF file (79.50 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your OMC Inboard Engine (Sterndrive) manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
Customer Reviews and Feedback
Read what our customers say about this OMC Inboard Engine (Sterndrive) manual and share your own experience.
Add Comment
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments (2)