BRAVO STERNDRIVE REPLACEMENT HUB
MerCruiser Bravo Sterndrive Replacements
SHOP BY COLLECTION
Explore MerCruiser Bravo Sterndrive Replacements
The Right Fit for Every MerCruiser Application
Explore Alpha One Gen I, Alpha One Gen II, and Bravo sterndrives with clear fitment details and support for confident selection.
Organized by Assembly Type
Browse complete Alpha One Gen I, II and Barvo sterndrives, upper units and lower units according to the assembly you need.
Ratio & Yoke Verification
Compare the existing gear ratio and input-yoke style before choosing an Alpha One Gen I replacement.
Secure Online Checkout
Place your MerCruiser sterndrive order through protected online payment processing.
Product Selection Support
Send your drive details and identification photos if you need help choosing the correct replacement configuration.
How Bravo Three’s Dual-Prop Design Affects Selection
Shop MerCruiser Bravo Replacements by Assembly Type
Standard vs Counter-Rotation Bravo Drives
Which Bravo Assembly Do You Need?
Compare a complete Bravo sterndrive vs upper unit, lower unit replacement and Bravo transom assembly before choosing your shopping path. The correct option depends on where the damage is located, the condition of the retained components and whether the existing upper-and-lower combination can be verified.
Complete Sterndrive
- Combines a matched Bravo upper and lower drive assembly
- Suitable when both drive sections require replacement
- Propeller and transom assembly are normally separate
- Trim system, anode kit and installation kit are not automatically included
- Always confirm the exact included components on the product page
Upper Unit
- Replaces only the upper section of the Bravo sterndrive
- Retained lower unit must be inspected and serviceable
- Upper and lower assemblies must be compatible
- Confirm the required upper-unit tooth count
- Verify the resulting overall gear ratio
- Check for the matching oil-recirculation passage
Lower Unit
- Replaces only the lower section of the Bravo drive
- Must match the retained upper unit
- Verify the complete-drive gear-ratio configuration
- Bravo One requires the correct side-only or dual water pickup
- Bravo Three lower units must match the listed ratio application
- Confirm the exact product number before ordering
Bravo One, Bravo Two and Bravo Three Shopping Guide
| Drive Family, Propeller Arrangement & Available Shopping Paths | Verify Before Ordering |
|---|---|
| Bravo One — Single-prop drive — Complete SE121 sterndrives, SE121 upper units, side-only and dual water-pickup lowers, and the listed transom application | Confirm the overall gear ratio, water-pickup style, upper tooth count, oil-passage configuration, and current part numbers |
| Bravo Two — Large single-prop drive — Selected SE121 upper-unit applications and the listed Bravo transom application | Do not assume a complete Bravo Two drive or lower unit is currently offered; verify the exact product and retained assembly |
| Bravo Three — Dual contra-rotating propellers on one drive — Complete SE128 sterndrives, compatible SE121 upper units, SE128 lower units, and the listed transom application | Confirm the overall ratio, matching upper and lower combination, product number, and Bravo Three dual-prop configuration |
What Customers Say
Excellent Bravo 3 dual-prop replacement
Replacing the Bravo Three drive on my 28-foot cruiser made a world of difference. The 2.00:1 gear ratio matched my 350 Mag MPI engine perfectly. Mariners Warehouse provided clear guidance on verifying drive shaft splines before ordering.
Solid Bravo 1 drive for high-horsepower 454
Finding a reliable Bravo One replacement for a 454 Mag V8 can be tough, but this unit handles the torque easily. The 1.50:1 ratio configuration was clearly listed, and shipping was fast with heavy-duty crate packaging.
Perfect fit for heavy cruiser with Bravo 2
The Bravo 2 replacement unit gave my heavy displacement hull the prop clearance and push it needed. The 2.20:1 gear ratio specs were spot-on. The serial number lookup advice on the site saved me from buying the wrong upper ratio.
Smooth twin-prop handling with Bravo III
Ordered a complete Bravo 3 upper and lower assembly. The counter-rotating dual props eliminate torque steer completely. The application guide on Mariners Warehouse made it simple to confirm compatibility with my 6.2L Mercruiser.
Direct bolt-on for Bravo 1 (1.65 ratio)
The 1.65:1 Bravo One unit bolted straight onto my original gimbal housing without any alignment issues. Shifting into gear is crisp and quiet. Make sure to follow the recommended 10-hour break-in oil change.
Clear technical specs for Bravo upper assembly
I appreciated how well the Bravo collection page breaks down gear ratio options by engine displacement. Buying the 1.81:1 ratio for our 5.0L MPI was quick, and the unit arrived fully sealed with all gaskets.
Heavy-duty construction for 502 Mag application
This replacement Bravo drive is built like a tank. It handles the high torque of my 502 block with zero issues. Fits exact OEM specs and saved me thousands compared to a factory crate drive.
Great support for twin Bravo 3 setup
We replaced both outdrives on a twin-engine setup. The product details made distinguishing between standard gear sets and rotation options straightforward. Water pressure and oil levels have remained rock solid.
Frequently Asked Questions
How do I identify the correct MerCruiser Bravo replacement?
Confirm whether the installed drive is Bravo One, Bravo Two or Bravo Three. Collect the engine and drive serial numbers, current part numbers, overall gear ratio and the assembly you need. For an upper or lower replacement, also confirm the retained assembly and its configuration.
What is the difference between Bravo One, Bravo Two and Bravo Three?
Bravo One uses a single propeller, Bravo Two is designed around a large single propeller, and Bravo Three uses two contra-rotating propellers on one drive. These drive configurations should not be treated as interchangeable without product-specific confirmation.
Does Mariners Warehouse sell complete Bravo Two sterndrives?
Current Bravo shopping paths primarily include Bravo One and Bravo Three complete sterndrives. Selected Bravo upper-unit and transom applications may mention Bravo Two. Check the current product listing or contact Mariners Warehouse for availability.
How do I choose the correct Bravo gear ratio?
Match the verified ratio of the installed application unless a qualified marine propulsion professional has specified a complete reconfiguration. Do not choose a Bravo gear ratio from horsepower, propeller appearance or desired speed alone.
Why does Bravo upper-unit tooth count matter?
The upper gear set combines with the lower unit to produce the complete sterndrive’s overall ratio. Match the required 29/27, 30/23 or 32/27 tooth-count application, retained lower unit and required oil-passage configuration.
What is the difference between side-only and dual water pickup?
These terms describe the water-inlet configuration on applicable Bravo One lower units. The 90-121-02 shopping path uses side-only inlets, while 90-122-02 is listed for a dual water-pickup configuration. Match the existing application before ordering.
Does Bravo Three require a separate counter-rotation lower unit?
Bravo Three uses two contra-rotating propellers on one drive. Shop it as a Bravo Three application and match the exact ratio and product number instead of applying a conventional standard-versus-counter lower-unit choice.
Will these SE121 uppers replace Bravo X, XR or XZ drives?
The current SE121 upper-unit applications are not listed as replacements for Bravo X, XR or XZ drives. Do not order for these applications unless the exact product page and current manufacturer data explicitly confirm compatibility.
Does a complete Bravo sterndrive include the transom assembly?
Do not assume it does. A complete sterndrive generally refers to a matched upper and lower drive assembly. The transom assembly, propeller, trim components, installation kit, anode kit, lubricant and hardware are separate unless the selected listing explicitly includes them.
What warranty applies to a Bravo replacement?
Warranty coverage is product-specific. Review the manufacturer and store terms linked to the selected SKU, including the coverage period, application requirements, exclusions, claim procedure and freight responsibility.
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