Trim Tilt Hydraulic Ram Cylinder Hose Kit for MerCruiser Alpha One and Bravo Drives – 4-Piece Set
Trim Tilt Hydraulic Ram Cylinder Hose Kit for MerCruiser Alpha One and Bravo Drives – 4-Piece Set is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Trim Tilt Hydraulic Ram Cylinder Hose Kit for MerCruiser Alpha One ...
Trim Tilt Hydraulic Ram Cylinder Hose Kit for MerCruiser Alpha One and Bravo Drives – 4-Piece Set is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket trim tilt hydraulic ram cylinder hose kit is designed as a replacement hose set for compatible MerCruiser stern-drive trim systems. Fitment includes selected Alpha One applications equipped with 15-9/16-inch trim cylinders and listed Bravo drive applications. This kit is not compatible with Alpha One Generation 2 models.
The hoses are listed as replacements for Mercury/MerCruiser part numbers 32-99904Q, 32-864589, 32-864588, 9B-104, and 9B-121. Confirm the drive model, trim-cylinder size, hose routing, fittings, and original part numbers before ordering.
- Complete four-piece hose set for compatible port and starboard trim cylinders.
- OEM-compatible fittings for a direct replacement installation on the applicable trim system.
- Braided stainless-steel outer construction for added protection and durability.
- Aftermarket replacement product; not manufactured by Mercury/MerCruiser.
Part Number Matrix
Use the following references to compare the replacement hoses with the original application.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 32-99904Q |
| Mercury/MerCruiser | 32-864589 |
| Mercury/MerCruiser | 32-864588 |
| Mercury/MerCruiser | 9B-104 |
| Mercury/MerCruiser | 9B-121 |
Drive Compatibility
Compatibility depends on the exact stern-drive configuration. Do not rely on the boat or engine name alone; compare the original hose arrangement, trim-cylinder size, fittings, and part-number references.
| Brand | Drive or Application | Condition | Reference Numbers | Important Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One | Selected applications with 15-9/16-inch trim cylinders | 9B-104, 9B-121 | Not compatible with Alpha One Generation 2. |
| MerCruiser | R and MR | Verify the original hose configuration and fittings | 32-99904Q, 32-864589, 32-864588 | Confirm the reference numbers before ordering. |
| MerCruiser | Bravo One | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Compare the original hoses and fittings. |
| MerCruiser | Bravo One X | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Verify the exact drive configuration before installation. |
| MerCruiser | Bravo Two | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Compare the original hoses and fittings. |
| MerCruiser | Bravo Three | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Verify the exact drive configuration before installation. |
| MerCruiser | Bravo XR | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Verify the exact drive configuration before installation. |
| MerCruiser | Bravo XZ | Listed Bravo application | 32-99904Q, 32-864589, 32-864588 | Verify the exact drive configuration before installation. |
Technical Specifications
- Product Type
- Trim tilt hydraulic ram cylinder hose kit
- Kit Contents
- Four hydraulic hoses
- Application
- Compatible MerCruiser trim-cylinder systems
- Installation
- Replacement hoses for compatible port and starboard trim cylinders
- Connection
- OEM-compatible fittings for the listed applications
- Outer Construction
- Braided stainless-steel outer layer
- Housing Color
- Silver/metallic
- Dimensions
- Hose dimensions vary by line; compare the original hoses before ordering
- Fitting Type
- OEM-compatible threaded fittings
- Product Status
- Aftermarket replacement; not an OEM component
What's in the Box
- 2 x power trim hoses replacing 32-99904Q
- 1 x power trim hose replacing 32-864589
- 1 x power trim hose replacing 32-864588
Installation Notes
- Secure the boat on a trailer or lift. Raise the stern drive to the full-up position and engage the appropriate support or trailering lock.
- Disconnect the battery to help prevent accidental operation of the trim system.
- Relieve residual hydraulic pressure according to the applicable service manual.
- Place absorbent pads or a suitable container beneath the hose fittings to collect hydraulic fluid.
- Remove the old hoses one at a time and record the routing and connection location of each line.
- Clean the fittings and install the replacement hoses with the correct routing. Tighten connections to the manufacturer's specified torque and do not overtighten.
- Check the reservoir and add the manufacturer's recommended power trim and tilt fluid if necessary.
- Reconnect the battery and operate the trim system through its range several times to help remove air from the lines.
- Inspect every connection for leaks while the system is operating.
- Recheck the fluid level after bleeding and top off only as required.
Troubleshooting & FAQ
How do I confirm that this hose kit fits my MerCruiser drive?
Confirm that your application is a listed Alpha One configuration with 15-9/16-inch trim cylinders or a listed Bravo drive application. Alpha One Generation 2 is excluded. Before ordering, compare the original hoses, fitting style, routing, cylinder size, and the applicable Mercury/MerCruiser reference numbers.
Do the hoses include the necessary fittings?
The hoses are supplied with OEM-compatible fittings for the listed applications. No special adapters are intended for a standard installation, but the original fittings and connection details should still be compared before installation.
What are common signs that trim hoses need replacement?
Common signs include hydraulic fluid around a fitting or along the hose, cracked or damaged hose material, visible bulging, a gradual fluid-level drop, or a trim system that becomes slow, spongy, or unresponsive.
How often should trim hoses be inspected?
There is no universal replacement interval. Inspect the hoses regularly and at least seasonally for leaks, abrasion, corrosion, cracking, brittleness, or other deterioration. More frequent inspection is appropriate in saltwater or harsh operating environments.
Is this an OEM product?
No. This is an aftermarket replacement hose kit intended for the listed applications and reference numbers. It is not manufactured by Mercury/MerCruiser.
Can I install the kit myself?
Installation involves hydraulic lines, fluid, pressure, and stern-drive safety considerations. Follow the applicable service manual and use a qualified marine technician if you are not familiar with trim and tilt hydraulic systems.
Safety & Important Information
- Verify the drive model, trim-cylinder size, original hose routing, fittings, and reference numbers before purchase.
- Do not use this kit for Alpha One Generation 2 applications.
- Never work beneath an unsupported stern drive. Use the proper mechanical support and follow the service manual.
- Hydraulic fluid can damage surfaces and may be hazardous. Use suitable protective equipment and dispose of used fluid properly.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when the correct fitment or bleeding procedure is uncertain.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for demanding real-world conditions.
- Global Fulfillment — Shipping options and delivery estimates are shown at checkout based on the destination.
- Manufacturer-Direct Value — We focus on practical replacement parts and consistent product quality.
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