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Description
Mercruiser Manifold Assembly Connector Kit – Fits Alpha One Gen 2 and Bravo I/II/III Stern Drives (Replaces 8M0137703, 98825A4, 8M0080805)Mercruiser Manifold Assembly Connector Kit Fits Alpha One Gen 2 and Bravo I II III Stern Drives This manifold assembly connector kit is designed for Mercruiser Alpha One Gen 2 and Bravo I, II, and III stern drives from 1983 and newer. It provides a reliable connection for the stern drive trim system, linking the hydraulic trim lines. This component is a direct replacement for several OEM and aftermarket parts, ensuring broad compatibility for repairs
Mercruiser Manifold Assembly Connector Kit – Fits Alpha One Gen 2 and Bravo I/II/III Stern Drives
This manifold assembly connector kit is designed for Mercruiser Alpha One Gen 2 and Bravo I, II, and III stern drives from 1983 and newer. It provides a reliable connection for the stern drive trim system, linking the hydraulic trim lines.
This component is a direct replacement for several OEM and aftermarket parts, ensuring broad compatibility for repairs and maintenance.
- Installation: Connects the hydraulic lines within the stern drive's power trim system.
- Housing Material: Constructed from durable aluminum for corrosion resistance.
- Included Components: Comes with the plate, junction block body, gaskets, lockwashers, and mounting bolts for a complete installation.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury / Quicksilver | 8M0137703 |
| Mercury / Quicksilver | 8M0080805 |
| Mercury | 98825A4 |
| Mercury | 98825A12 |
| GLM | 21970 |
| Sterndrive Engineering | 9F-116-17K |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercruiser owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercruiser | Alpha One Gen 2 | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
| Mercruiser | Bravo I | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
| Mercruiser | Bravo II | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
| Mercruiser | Bravo III | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
| Mercruiser | R/MR | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
| Mercruiser | MC-1 | Various | Various | 1983 and up | 98825A4/8M0137703 | Stern drive trim connector |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Manifold Assembly Connector Kit |
| Installation | Stern drive trim system connection |
| Connection | Hydraulic trim line connection |
| Housing Material | Aluminum |
| Housing Color | Silver/Metallic |
| Fitting Type | Threaded manifold assembly |
| Other Technical Attributes | For stern drive trim systems |
Package Contents
- 1 x Plate
- 1 x Junction Block Body
- 2 x Gaskets
- 2 x Lockwashers
- 2 x Mounting Bolts
Installation Guide
- Safety First: Disconnect the boat's battery to prevent any electrical accidents.
- Access the Connector: Locate the existing manifold connector assembly on the transom. Access may require tilting the stern drive.
- Prepare for Fluid: Place a drain pan and absorbent rags under the hydraulic lines to catch any spilling trim fluid.
- Disconnect Lines: Carefully loosen and disconnect the hydraulic trim lines from the junction block body.
- Remove Old Assembly: Unfasten the two mounting bolts holding the old manifold assembly and remove it, along with the old gaskets.
- Clean Surface: Thoroughly clean the mounting surface on the transom, removing any old gasket material or corrosion.
- Install New Gaskets: Place the new gaskets onto the new junction block body.
- Mount New Assembly: Position the new manifold assembly and secure it using the new mounting bolts and lockwashers. Tighten to manufacturer-specified torque.
- Reconnect Lines: Re-attach the hydraulic trim lines to the new junction block. Ensure the fittings are tight to prevent leaks.
- Bleed and Refill: Top off the power trim fluid reservoir and bleed the system of any air according to your drive's service manual.
- Test Operation: Reconnect the battery. Operate the trim system up and down several times, checking for smooth operation and any signs of leaks.
Troubleshooting & FAQ
Q: How do I confirm this manifold connector will fit my specific Mercruiser drive?
A: This kit is designed for Mercruiser R/MR, Alpha One Gen 2, and Bravo I/II/III models made from 1983 and onward. The best way to confirm fitment is to match your existing part's number to one of the cross-reference numbers listed (e.g., 8M0137703, 98825A4). Visual comparison with the product images is also recommended.
Q: What are the common symptoms of a failing manifold connector?
A: Signs of failure often include hydraulic fluid leaks around the transom-mounted connector, a spongy or unresponsive trim system, or the inability of the stern drive to hold its trim position. Visual inspection may reveal cracks or corrosion on the housing.
Q: Does this kit include everything needed for the job?
A: This kit includes all the core components for the replacement: the plate, block body, gaskets, bolts, and lockwashers. You will need to supply your own tools and fresh power trim/tilt fluid.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy