Trim Tilt Hydraulic Ram Cylinder Hose Kit – Fits MerCruiser Alpha One & Bravo I, II, III (Replaces 32-99904Q, 32-864589, 32-864588)
Trim Tilt Hydraulic Ram Cylinder Hose Kit – Fits MerCruiser Alpha One & Bravo I, II, III (Replaces 32-99904Q, 32-864589, 32-864588) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Trim Tilt Hydraulic Ram Cylinder Hose Kit – Fits MerCruiser Alpha O...
Product Details
This aftermarket Trim Tilt Hydraulic Ram Cylinder Hose Kit is engineered for MerCruiser Alpha One stern drives equipped with 15-9/16" trim cylinders and is compatible with Bravo I, II, III, X, XR, and XZ series drives. Please note, this kit does not fit Alpha One Generation 2 models.
The kit serves as a direct replacement for Mercury/MerCruiser part numbers 32-99904Q, 32-864589, 32-864588, 9B-104, and 9B-121.
- Includes a complete set of 4 hydraulic lines for both port and starboard trim cylinders.
- Features OEM-compatible fittings for a direct-fit installation.
- Constructed with a braided stainless steel outer housing for enhanced durability.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 32-99904Q |
| Mercury/MerCruiser | 32-864589 |
| Mercury/MerCruiser | 32-864588 |
| Mercury/MerCruiser | 9B-104 |
| Mercury/MerCruiser | 9B-121 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser models, this kit is compatible with specific Alpha One drives (with 15-9/16" trim cylinders) and all Bravo series drives. It is not compatible with Alpha One Generation 2 models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha One | Various | 4-Stroke | Various | 9B-104, 9B-121 | With 15-9/16" trim cylinders only; NOT compatible with Gen 2 |
| MerCruiser | R, MR | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo One | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo One X | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo Two | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo Three | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo XR | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 | |
| MerCruiser | Bravo XZ | Various | 4-Stroke | Various | 32-99904Q, 32-864589, 32-864588 |
Technical Specs
- Product Type
- Trim Tilt Hydraulic Ram Cylinder Hose Kit
- Installation
- Direct replacement for port and starboard trim cylinders
- Connection
- OEM-compatible fittings for MerCruiser trim systems
- Housing Material
- Braided stainless steel outer layer
- Housing Color
- Silver/metallic
- Dimensions
- Varies by hose (see Package Contents)
- Weight
- 0.45 kg (1 lb)
- Fitting Type
- OEM-compatible threads
- Warranty
- 1 year (aftermarket)
What’s in the Box
- 2 x Power Trim Hose (Replaces 32-99904Q)
- 1 x Power Trim Hose (Replaces 32-864589)
- 1 x Power Trim Hose (Replaces 32-864588)
Installation Notes
- Secure the boat on a trailer or lift. Tilt the stern drive to the full "UP" position and engage the trailering lock.
- Disconnect the battery to prevent accidental operation of the trim system.
- Carefully relieve any residual pressure from the hydraulic system according to your service manual.
- Place absorbent pads or a container beneath the hose fittings to catch any hydraulic fluid.
- One at a time, loosen and remove the old hydraulic hoses. Note the routing of each hose.
- Install the new hoses, ensuring fittings are clean and correctly threaded. Tighten to manufacturer-specified torque; do not overtighten.
- Check the hydraulic fluid reservoir and fill with the manufacturer-recommended power trim/tilt fluid.
- Reconnect the battery.
- Cycle the trim system up and down several times to bleed air from the lines.
- Carefully inspect all hose connections for any signs of leaks.
- Re-check the fluid level and top it off as needed after bleeding is complete.
Troubleshooting & FAQ
How do I know if this hose kit fits my MerCruiser drive?
This kit is designed for MerCruiser Alpha One drives equipped with 15-9/16" trim cylinders and all Bravo series drives (I, II, III, X, XR, XZ). It is crucial to note that it is not compatible with Alpha One Generation 2 models. Always verify your drive model and trim cylinder size before ordering.
Do these hoses come with the necessary fittings?
Yes, the hoses are equipped with OEM-compatible fittings for a direct connection to your existing MerCruiser trim system. No special adapters are required for a standard installation.
What are the signs that my trim hoses need replacement?
Common signs of failing hydraulic hoses include visible fluid leaks around the fittings or along the hose length, cracking or bulging in the hose material, and a spongy or unresponsive trim system. A gradual drop in hydraulic fluid level can also indicate a slow leak.
How often should trim hoses be inspected or replaced?
There is no fixed replacement interval, but regular inspection is key. We recommend inspecting hoses seasonally for any signs of wear, degradation, or leaks. Hoses should be replaced proactively if they appear brittle, cracked, or are leaking, especially in saltwater environments where corrosion is a factor.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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