Bravo One
- Heavier-duty drive for larger V8s
- Single propeller
- Shift mechanism in the transom plate
MerCruiser Bravo One
- 1988–
Drive specs
| Model years | 1988– |
|---|---|
| Type | Drives |
| Gear ratios | 1.36:1 · 1.5:1 · 1.65:1 |
|---|---|
| Upper gear unit | Upper gear 27/29, 27/32 or 23/30 (XR: 16/19) |
| Oil type | Mercury/Quicksilver High Performance Gear Lube SAE 90 |
| Oil capacity | 1.9 l |
| Propeller system | Single propeller |
1.90 l without oil monitor reservoir; 3.07 l with round, 2.60 l with rectangular reservoir.
Lower unit variants
| Variant | Gear ratio | Year | Identification | Source |
|---|---|---|---|---|
| Bravo One / One X, lower 15/19 | 1.36:1 / 1.50:1 / 1.65:1 | — | Upper gear 27/29, 27/32 or 23/30 gives the overall ratio · Only one lower gear set; the ratio is set by the upper gear | Mercruiserparts.com: Bravo gear ratio table |
| Bravo One XR | 1.26:1 / 1.35:1 / 1.50:1 | — | XR upper gear 16/19 with lower 17/18, 15/17 or 15/19 | Mercruiserparts.com: Bravo gear ratio table |
| Bravo One 1988–1990 | — | 1988–1990 | Serial numbers 0B664190–0D469908 | Sterndrives.com: drive table with serial numbers and gear ratios |
| Bravo One 1991–1999 | — | 1991–1999 | Serial numbers 0D469909–0L999999 | Sterndrives.com: drive table with serial numbers and gear ratios |
| Bravo One 2000–2004 | — | 2000–2004 | Serial numbers 0M100001–0W249999 | Sterndrives.com: drive table with serial numbers and gear ratios |
| Bravo One 2004– | — | 2004– | Serial numbers from 0W250000 (XR: 0W240000) | Sterndrives.com: drive table with serial numbers and gear ratios |
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
Runs rough, stalls or loses power
Cooling and temperature
Electrics, alarms and fault codes
How to identify the drive
Decal on the port or starboard side of the upper drive shaft housing. On newer Bravo drives the number may be stamped behind the rear cover. The transom assembly has its own number on the inner or outer plate. Confirm the gear ratio from the markings or a serial-number-specific parts catalog.
Compare all drives →Official identification charts
- Sterndrives.com: MerCruiser Sterndrive Chart (years, serial numbers, gear ratios)
- Mariner's Warehouse: How to identify a MerCruiser outdrive (Alpha One, Gen II, Bravo)
- MercruiserParts: Where is my serial number
Manuals
Spare parts
| Part | Part number | Note | Source |
|---|---|---|---|
| Transom bellows/seal kit with exhaust bellows | 8M0095485 | Bravo and Blackhawk with exhaust bellows | Mercury Marine: 8M0095485 (blocks bots, opened in browser) (external link) |
| Gimbal bearing | 30-879194A01 | Bravo One, Two and Three | PowerBoatSupply: 30-879194A01 (external link) |
| Gimbal bearing (older) | 30-879194A02 | Bravo One 1988–1995 | PowerBoatSupply: gimbal bearing 30-879194A02 (MC-1, R, MR, Alpha 1974–1997, Bravo One 1988–1995) (external link) |
| Anode kit, aluminium | 888758Q02 | Bravo One 1988– | Mercury Marine: 888758Q02 (blocks bots, opened in a browser) (external link) PowerBoatSupply: 97-888758Q02 (external link) |
Exploded views & parts catalogs
- ShopService bulletin 2001-17: Bravo Gear Change
- ShopMercruiserparts.com: exploded views (Mercury parts catalogue)
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Related models
Service guides
Frequently asked questions about MerCruiser Bravo One
Where can I find the owner's manual for MerCruiser Bravo One?
Links to owner's manuals and workshop manuals are available under Manuals.
Sources
- Mercury Marine: Bravo One, One X and One XR (blocks bots, opened in browser) (external link)
- Mercruiserparts.com: Bravo gear ratio table
- Mercruiserparts.com (BAM Marine): oil capacities for MerCruiser drives
- Mercruiserparts.com: exploded views for all Bravo drives
- Mercury: gimbal bearing 879194A01 for Alpha and Bravo (blocks bots, opened in browser) (external link)
- PowerBoatSupply: gimbal bearing 30-879194A02 (MC-1, R, MR, Alpha 1974–1997, Bravo One 1988–1995) (external link)
- Sterndrives.com: drive table with serial numbers and gear ratios
- Mercury Marine: MerCruiser – the leader in sterndrive innovation (blocks bots, opened in browser) (external link)
- Wikipedia: Mercury Marine (en) (external link)
- Mercury Marine: 8M0095485 (blocks bots, opened in browser) (external link)
- PowerBoatSupply: 30-879194A01 (external link)
- Mercury Marine: 888758Q02 (blocks bots, opened in a browser) (external link)
- PowerBoatSupply: 97-888758Q02 (external link)
- Mariner's Warehouse: identifying MerCruiser drives
- MercruiserParts: serial number location