OMC King Cobra
- For big-block V8s (7.4–7.5 l)
- Heavier-duty lower unit
- Single propeller
OMC King Cobra
Drive specs
| Type | Drives |
|---|
| Upper gear unit | Upper gear ratio varies by engine (21:16–24:29) |
|---|---|
| Oil type | Quicksilver High Performance Gear Lube |
| Oil capacity | 1.89 l |
| Propeller system | Single propeller |
460: 3.19 l; with cone clutch 3.05 l.
Lower unit variants
| Variant | Gear ratio | Year | Identification | Source |
|---|---|---|---|---|
| King Cobra 262/350 | — | — | Oil capacity 1.89 l | Quicksilver Application Guide p. 56: oil capacities OMC Cobra (external link) |
| King Cobra 460 | — | — | Oil capacity 3.19 l; with cone clutch 3.05 l | Quicksilver Application Guide p. 56: oil capacities OMC Cobra (external link) |
| Cobra/King Cobra, GM 2.5 l / 3.0 l before 1989 | — | — | Tooth count upper gear 21:18, lower 13:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, GM 3.0 l from 1989 | — | — | Gear teeth: upper 21:21, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, GM 4.3 l | — | — | Gear teeth upper 21:19, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, GM 5.0 l | — | — | Gear teeth: upper gear 21:17, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, GM 5.7 l | — | — | Gear ratio upper gear 21:16, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, GM 454/502 after 1988 | — | — | Gear teeth upper gear 21:17, lower 17:20 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 2.3 l | — | — | Gear teeth: upper 21:21, lower 13:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 5.0 L | — | — | Gear teeth: upper gear 21:18, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 5.8 l | — | — | Gear ratio upper gear 21:16, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 351 after 1992 | — | — | Gear teeth: upper gear 21:17, lower 14:26 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 7.5 l before 1988 | — | — | Gear teeth: upper gear 21:17, lower 17:30 | sterndrive.info: King Cobra gear ratio table (external link) |
| Cobra/King Cobra, Ford 7.5 L after 1988 | — | — | Gear ratio upper gear 24:29, lower 17:20 | sterndrive.info: King Cobra gear ratio table (external link) |
Service points
- Drive oil: change it and check that it isn't milky (water)
- Bellows: U-joint bellows, exhaust bellows, shift cable bellows
- Gimbal bearing
- Sacrificial anodes
- Propeller and propeller shaft seals
Troubleshooting
How to identify the drive
Check the model and serial numbers, not just the engine's output. Tell the Stringer (beam mounting and ball-type gears) apart from the Cobra (transom mounting, U-joint and trim cylinders). 400/800 denote small and large gear housings respectively.
Compare all drives →Official identification charts
- Mariner's Warehouse: How to identify an OMC Cobra lower unit
Exploded views & parts catalogs
Listings for OMC King Cobra
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Related models
Service guides
Sources
- sterndrive.info: King Cobra gear ratio table (external link)
- Quicksilver Application Guide p. 56: oil capacities OMC Cobra (external link)
- GLM Marine: OMC catalog with exploded views (Stringer, Cobra) (external link)
- Wikipedia: Outboard Marine Corporation (en) (external link)
- sterndrive.info: OMC drive gear ratios and history (external link)
- GLM Marine: 30 Years of the OMC Sterndrive (external link)
- sterndrive.info: OMC 800 and Cobra (external link)