Hydraulic Manifold Assembly Connector Kit – Fits MerCruiser Alpha One Gen 2 & Bravo Drives (Replaces 8M0137703, 8M0080805, 98825A4, 98825A12)
Hydraulic Manifold Assembly Connector Kit – Fits MerCruiser Alpha One Gen 2 & Bravo Drives (Replaces 8M0137703, 8M0080805, 98825A4, 98825A12) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Hydraulic Manifold Assembly Connector Kit – Fits MerCruiser Alpha O...
Product Details
This Hydraulic Manifold Assembly Connector Kit is designed for MerCruiser sterndrives, including MC-1, R, MR, Alpha One Gen 2, and all Bravo models from 1983 and newer. It serves as a crucial connection point in the power trim hydraulic system, ensuring reliable operation.
The kit provides a direct interchange for multiple OEM and aftermarket part numbers, including Mercury/MerCruiser 8M0137703, 8M0080805, 98825A4, and 98825A12.
- Engineered as a direct bolt-on replacement for a straightforward installation.
- Features corrosion-resistant aluminum construction for durability in marine environments.
- Includes all necessary gaskets, lockwashers, and mounting bolts for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 8M0137703 |
| Mercury/MerCruiser | 8M0080805 |
| Mercury/MerCruiser | 98825A4 |
| Mercury/MerCruiser | 98825A12 |
| GLM | 21970 |
| Sterndrive Engineering | 9F-116-17K |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | MC-1 | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | R | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | MR | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Alpha One Gen 2 | 1991 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo I | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo II | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo III | 1983 & Up | 8M0137703/8M0080805 | |
| MerCruiser | Bravo X | 8M0137703/8M0080805 | ||
| MerCruiser | Bravo XR | 8M0137703/8M0080805 | Includes XR sportmaster | |
| MerCruiser | Bravo XZ | 8M0137703/8M0080805 |
Technical Specs
- Product Type
- Hydraulic Power Trim Line Manifold Connector Assembly
- Installation
- Direct bolt-on replacement
- Connection
- 2 inputs, 4 outputs
- Housing Material
- Aluminum
- Housing Color
- Silver/metallic
- Weight
- 0.40 lb (0.18 kg)
- Other Technical Attributes
- Corrosion-resistant aluminum construction
What’s in the Box
- 1 x Plate
- 1 x Junction Block Body
- 2 x Gaskets (27-98823-1)
- 2 x Lockwashers (13-78968)
- 2 x Mounting Bolts/Screws (10-28668)
Installation Notes
- Ensure the engine is off and disconnect the battery for safety.
- Place a drain pan under the hydraulic manifold to catch any fluid.
- Carefully disconnect the hydraulic lines from the old manifold, noting their positions.
- Unbolt and remove the old manifold and gasket.
- Thoroughly clean the mounting surface on the transom to ensure a proper seal.
- Position the new gasket and manifold, then secure it with the provided bolts and lockwashers. Torque to manufacturer specifications.
- Reconnect the hydraulic lines to the correct ports on the new manifold.
- Reconnect the battery.
- Top off the hydraulic fluid reservoir and bleed the power trim system according to your drive's service manual.
- Operate the trim system multiple times and check for any leaks at the connections.
Troubleshooting & FAQ
How do I know if this manifold will fit my specific MerCruiser drive?
This manifold fits a wide range of MerCruiser drives from 1983 and newer, including MC-1, R, MR, Alpha One Gen 2, and Bravo series. The best way to confirm is to match your existing part number to one of the equivalents listed in our Part Number Matrix (e.g., 8M0137703, 98825A4).
What are the common signs of a failing hydraulic manifold?
Signs of failure include visible hydraulic fluid leaks around the manifold body or its connections, a spongy or unresponsive trim/tilt system, or a trim pump that runs continuously without moving the drive. Corrosion or cracks in the housing are also clear indicators that replacement is needed.
Is this kit all I need for the replacement?
Yes, this kit includes the manifold body, plate, and all required mounting hardware (gaskets, bolts, washers) for a standard replacement. You will only need basic hand tools and fresh hydraulic trim fluid.
Can I replace this part myself?
Yes, this is a common DIY repair for those with mechanical experience. The process involves disconnecting lines, unbolting the old unit, and installing the new one. However, it is crucial to follow the service manual procedures for bleeding the hydraulic system afterward to ensure proper function. If you are unsure, professional installation is recommended.
What is the difference between an OEM and an aftermarket part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency and quality.
How much is shipping and how fast will I get my order?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most regions. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window, provided the part is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchasing. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — Enjoy free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — We offer fair pricing by eliminating middlemen, without ever compromising on materials or quality control.
Payment & Security
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