1964-1998 OMC Cobra, King Cobra & Stringer Sterndrive Service Manual: 2.5L - 7.5L / 120hp - 454hp

1964–1998 OMC Cobra, King Cobra & Stringer Sterndrive Service Manual

• Covers 1964–1998 OMC Cobra, King Cobra, and Stringer sterndrive units paired with 2.5L to 7.5L (120 HP–454 HP) inboard engines, including both in-line and V-block configurations
• Official OEM publication with 1183 pages of technical content
• Contains 47 exploded-view diagrams and 32 electrical wiring schematics
• File delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Suitable for printing individual sections for shop-floor use
• This 1964–1998 OMC Cobra, King Cobra & Stringer Sterndrive Service Manual documents the transition from early Stringer units to the 1978-onwards Cobra sterndrive systems

Sterndrive and Engine Technical Scope

This 1964–1998 OMC Cobra, King Cobra & Stringer service manual provides extensive documentation for the maintenance and assembly of sterndrive and inboard propulsion systems. The text details the mechanical layout of GM and Ford V8 engines, GMC in-line engines, and the V6 configurations including the 225, 229, and 4.3L variants. Each section includes specific removal and installation procedures, valve lash adjustment charts, and camshaft service guidelines.

Additional chapters define the mechanical requirements for tilt mechanisms, steering systems, and fuel delivery. Readers will find information on carburetor bench adjustments for Rochester and Holley units, alongside detailed battery and alternator charging system troubleshooting. The content also addresses the critical marine maintenance requirements, including below-waterline service, anode (zinc) installation, and corrosion protection protocols.

Specification and Data Highlights

Engine compression values for the 1964–1998 OMC Cobra range are documented at 150–170 PSI, with 120 PSI noted as a standard threshold for mechanically sound modern variants. Cylinder head bolt torque values are provided in multi-stage sequences within the engine service data. Valve clearance for the intake is listed at 0.003–0.005 inches on specified models. Cooling system maintenance intervals and exhaust manifold mounting protocols are provided for all documented engine sizes. A compression testing chart for quick reference is included, allowing for identification of performance thresholds at various PSI readings.

Reference only — always consult a certified technician before performing service on this equipment.

An official 1183-page OMC OEM service manual covering the 1964–1998 Cobra, King Cobra, and Stringer sterndrive systems, documenting engine, drivetrain, cooling, and electrical specifications for the full range of 120–454 HP powerplants.

Document Reference: www.instant-manuals.com (Original OEM manufacturer publication identity confirmed within document)