Trim Connector Kit – Fits Mercury MerCruiser Alpha & Bravo Sterndrives (Replaces 8M0080805, 98825A4, 8M0137703)
Trim Connector Kit – Fits Mercury MerCruiser Alpha & Bravo Sterndrives (Replaces 8M0080805, 98825A4, 8M0137703) 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 Connector Kit – Fits Mercury MerCruiser Alpha & Bravo Ster...
Product Details
This aftermarket Trim Connector Kit is designed for Mercury MerCruiser Alpha One, Alpha One Gen II, and all Bravo sterndrive models from 1983 and newer. The kit provides a reliable, direct-fit replacement for the hydraulic trim line manifold, ensuring a secure connection and preventing fluid leaks to keep your trim system operating smoothly.
It serves as a direct interchange for Mercury part numbers 8M0080805, 98825A4, 8M0137703, and 98825A12, as well as GLM 21970.
- Engineered for a direct bolt-on replacement, simplifying installation.
- Constructed from high-strength aluminum for durability in marine environments.
- Includes all necessary gaskets and hardware for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 8M0080805 |
| Mercury | 98825A4 |
| Mercury | 8M0137703 |
| Mercury | 98825A12 |
| GLM | 21970 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is specifically designed for Mercury MerCruiser sterndrives. Please check the model, year, and serial number range to ensure proper fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | Alpha One | Various | 4-Stroke | 1983–1990 | 98825A4 | s/n 6225577-0F386995 |
| MerCruiser | Alpha One | Various | 4-Stroke | 1991+ | 98825A4 | s/n 2A629407 & Up |
| MerCruiser | Alpha One Gen II | Various | 4-Stroke | 1991–1995 | 98825A4 | |
| MerCruiser | Alpha One Gen II | Various | 4-Stroke | 1996–1997 | 98825A4 | |
| MerCruiser | Alpha One Gen II | Various | 4-Stroke | 1998+ | 98825A4 | s/n 0L100040 & Up |
| MerCruiser | Alpha One Gen II | Various | 4-Stroke | Various | 98825A4 | s/n 0D469859-0K999998 |
| MerCruiser | Bravo One | Various | 4-Stroke | 1988+ | 98825A4 | s/n 0B664190 & Up |
| MerCruiser | Bravo Two | Various | 4-Stroke | 1988+ | 98825A4 | s/n 0B664190 & Up |
| MerCruiser | Bravo Three | Various | 4-Stroke | 1988+ | 98825A4 | s/n 0B664190 & Up |
| MerCruiser | Bravo Four | Various | 4-Stroke | Various | 98825A4 | s/n 0W250000 & Up |
| MerCruiser | Bravo Sport | Various | 4-Stroke | Various | 98825A4 | s/n 0M970842 & Up |
| MerCruiser | Bravo Sportmaster | Various | 4-Stroke | Various | 98825A4 | s/n 0M052945 & Up |
| MerCruiser | R/MR/Alpha One | Various | 4-Stroke | 1983–1990 | 98825A4 | Transom Assembly |
| MerCruiser | R/MR/Alpha One | Various | 4-Stroke | 1983–1990 | 98825A4 | Sterndrive |
Technical Specs
- Product Type
- Trim Line Connector Kit
- Installation
- Direct bolt-on replacement
- Connection
- 1/4" hydraulic tube fittings
- Housing Material
- Aluminum
- Housing Color
- Silver (unpainted metal)
- Product Dimensions
- 9.5" L x 8.0" W x 6.0" H
- Weight
- 0.12 kg (4.2 oz)
- Fitting Type
- Hydraulic line manifold assembly
- Warranty
- 1 Year (aftermarket)
- Other Technical Attributes
- For hydraulic trim hoses on MerCruiser outdrives using 1/4" tube fittings
What’s in the Box
- 1 x Trim Connector Body & Plate (21971)
- 1 x Gasket (32500)
- 1 x Gasket (32160)
- 2 x Lockwasher (78968)
- 2 x Screws (22440)
Installation Notes
- Tilt the sterndrive to the full "up" position and engage the trailering lock for safety.
- Disconnect the vessel's battery to prevent accidental electrical activation.
- Place a suitable drain pan beneath the transom assembly to catch any hydraulic fluid.
- Thoroughly clean the area around the old trim connector to prevent debris from entering the hydraulic system.
- Carefully loosen and remove the two hydraulic lines from the connector. Be prepared for minor fluid spillage.
- Unbolt and remove the old connector assembly and its gaskets from the transom.
- Clean the mounting surface on the transom, ensuring it is free of old gasket material and corrosion.
- Position the new gaskets and connector assembly, then fasten them with the included screws and lockwashers.
- Reconnect the hydraulic lines to the new connector, ensuring the fittings are snug but not overtightened.
- Reconnect the battery.
- Cycle the trim system up and down several times to bleed air. Check carefully for any leaks at the fittings and mounting plate.
- Top off the power trim fluid reservoir to the correct level as specified in your owner's manual.
Troubleshooting & FAQ
How do I know if this connector fits my sterndrive?
This kit is designed for a wide range of MerCruiser Alpha and Bravo sterndrives from 1983 and newer. The best way to confirm compatibility is to check your model and serial number against the Engine & Model Compatibility table on this page. You can also match your existing part number to the references in the Part Number Matrix.
What are the signs of a failing trim connector?
Common symptoms include visible hydraulic fluid leaks around the connector (either at the fittings or the base gasket), a spongy or unresponsive trim system, or a trim pump that runs continuously without moving the drive. Corrosion on the aluminum housing is also an indicator that replacement is due.
Is any special sealant needed for the gaskets?
No, additional sealant is generally not required. The included gaskets are designed to create a proper seal on a clean, flat mounting surface. Using sealant can sometimes interfere with the seal or introduce contaminants into the hydraulic system.
Can I reuse my old mounting screws and hydraulic line fittings?
This kit includes new mounting screws and lockwashers, and it's highly recommended to use them. While you will reuse your existing hydraulic line fittings, inspect them for corrosion or damage. Replace them if they appear worn to ensure a leak-free connection.
How often should this part be inspected?
It is good practice to visually inspect the trim connector and hydraulic lines during regular seasonal maintenance. Look for any signs of fluid leaks, weeping around the seals, or heavy corrosion. Address any issues immediately to prevent trim system failure.
Why is this an aftermarket part and not OEM?
This listing is for an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is engineered to meet or exceed OEM specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency, offering a reliable alternative at a better value.
What are your shipping speeds and costs?
We ship worldwide. Most orders are delivered within 5–15 days via standard shipping, which is free to most regions. Expedited shipping options and exact costs are available at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against 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, typically arriving in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
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