SKU: 38723430488

Mercruiser Manifold Assembly Connector Kit – Fits Alpha One Gen 2 and Bravo I/II/III Stern Drives (Replaces 8M0137703, 98825A4, 8M0080805)

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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

  1. Safety First: Disconnect the boat's battery to prevent any electrical accidents.
  2. Access the Connector: Locate the existing manifold connector assembly on the transom. Access may require tilting the stern drive.
  3. Prepare for Fluid: Place a drain pan and absorbent rags under the hydraulic lines to catch any spilling trim fluid.
  4. Disconnect Lines: Carefully loosen and disconnect the hydraulic trim lines from the junction block body.
  5. Remove Old Assembly: Unfasten the two mounting bolts holding the old manifold assembly and remove it, along with the old gaskets.
  6. Clean Surface: Thoroughly clean the mounting surface on the transom, removing any old gasket material or corrosion.
  7. Install New Gaskets: Place the new gaskets onto the new junction block body.
  8. Mount New Assembly: Position the new manifold assembly and secure it using the new mounting bolts and lockwashers. Tighten to manufacturer-specified torque.
  9. Reconnect Lines: Re-attach the hydraulic trim lines to the new junction block. Ensure the fittings are tight to prevent leaks.
  10. Bleed and Refill: Top off the power trim fluid reservoir and bleed the system of any air according to your drive's service manual.
  11. 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:
  1. 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
SKU: 38723430488

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superlee
Belleville, US
★★★★★ 3
Defective product
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All screws cannot fit with each connectors. The Allen key provided is useless because it doesn’t fit into screws.
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Reviewed in the United States on November 7, 2025
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Bryon A.
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Privacy panels
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They're well made,fabric is fairly thick but the wording had me thinking i was buying 4 sets of 4 panels instead of just 4 panels. My fault i guess.....
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Kindle Customer
Charlottesville, US
★★★★★ 5
Looks great
Size: 1 Panel, Color: Black
Easy set up works great.
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Miriam T.
Charlottesville, US
★★★★★ 5
Recomendado
Color: Grey
Exelente! Fácil de instalar y muy efectivo para el propósito para el cual lo compré. Recomendado!
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Reviewed in the United States on May 30, 2026

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