OMC Cobra Sterndrive 2.3L-5.8L Outboard Marine Corporation Workshop Manual
Documents OMC Cobra Sterndrive service procedures for 2.3L, 3.0L, 4.3L, 5.0L, 5.7L, and 5.8L models. Includes engine and drive unit information. PN 909570.
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Sample pages from the OMC Cobra Sterndrive 2.3L-5.8L Outboard Marine Corporation Workshop Manual manual
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OMC Models Covered & Key Technical Specifications
Models: OMC Cobra Sterndrive Sub-models / Variants: 2.3 Litre, 3.0 Litre, 3.0 Litre HO, 4.3 Litre, 4.3 Litre HO, 5.0 Litre, 5.0 Litre HO, 5.7 Litre, 5.8 Litre Trade Names: OMC Cobra Technical Data:
- Fuel requirements: 86–89 AKI (90–93 RON) dependent on engine model
- Oil capacity (with filter): 4.0 to 6.0 quarts (3.8 to 5.7 liters) depending on engine displacement
- Crankcase oil type: API Service SG/CD
- Vertical drive lubricant: OMC Hi-Vis gearcase lube
- Spark plug gap: 0.030–0.035 in (0.76–0.9 mm)
- Fuel pump pressure: 5.75–7 PSI (40–48 kPa)
OMC Manual Features & Content Preview
Technical Scope for the OMC Cobra Sterndrive
- Covers 2.3L through 5.8L OMC Cobra sterndrive systems, including high-output (HO) variants and various gearcase configurations.
- Original OEM publication, OMC service manual.
- Contains 47 labeled engine component diagrams, comprehensive electrical schematics, and 12 technical specification tables.
- Stored against your account so you can retrieve it after a hard-drive loss.
- Indexed PDF search covers every chapter and appendix.
- This workshop manual serves as the primary technical reference for the OMC Cobra sterndrive line, detailing installation, service, and maintenance parameters essential for marine technicians and owners.
Engine and Drive System Walkthrough
This OMC Cobra sterndrive manual documents the operation and maintenance for the entire model range. The documentation is organized by system, covering the electrical, fuel, and cooling systems alongside specific engine-block chapters for the 2.3L, 3.0L, 4.3L, 5.0L, 5.7L, and 5.8L powerplants. Extensive sections provide technical insight into the transom bracket assembly, upper and lower gear housings, power trim/tilt systems, and steering linkages. The publication details the removal and installation procedures for engine and drive components, supporting the operator in maintaining marine drive integrity.
Marine Service Specifications
This manual provides comprehensive reference data for tuning, lubrication, and system maintenance. Compression pressure limit charts and detailed distributor specifications allow for precise engine analysis. The document lists torque specifications for standard U.S. and metric fasteners, ensuring component security during assembly. Oil pressure for the 2.3L is specified at 30–50 PSI at 800 RPM in the lubrication data table. Coolant capacity varies by system configuration, with specific drain procedures provided for each engine size. The what an OEM service publication covers includes timing procedures for both initial setup and final adjustment, referencing the 10° BTDC requirement for the 2.3L models. Reference values for oil pressure sending units are specified at 448 ohms at 100°F. Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions. An official OMC workshop manual covering the 2.3L–5.8L Cobra sterndrive, documenting engine, gearcase, electrical, and fuel-system specifications for the OMC drive unit series.
Document Reference: OMC Cobra Stern Drive Service Manual, Section 1–3
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