Power Trim Hose Connector Plate Gasket – Fits MerCruiser Sterndrives (Replaces MERCURY MARINE 27-47644-1)
Power Trim Hose Connector Plate Gasket – Fits MerCruiser Sterndrives (Replaces MERCURY MARINE 27-47644-1) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Power Trim Hose Connector Plate Gasket – Fits MerCruiser Sterndrive...
Product Details
This Power Trim Hose Connector Plate Gasket provides a reliable seal for the power trim hose connector plate on various MerCruiser sterndrive models manufactured up to 1995. It's engineered to prevent hydraulic fluid leaks and ensure proper trim system function.
It serves as a direct cross-reference for Sierra 18-0342, GLM 31470, Barr MC472747644, and Mercury Marine parts 27-47644 and 27-47644-1.
- Installs on the power trim hose connector plate.
- Ensures a precise, factory-grade seal to prevent fluid loss.
- Engineered from durable materials for longevity in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercruiser | 27-47644-1 |
| Mercruiser | 27-47644 |
| Sierra | 18-0342 |
| GLM | 31470 |
| Barr | MC472747644 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for a range of MerCruiser sterndrives from the 1980s and 1990s.
| Brand | Model | Years | OEM Part No. |
|---|---|---|---|
| MerCruiser | Alpha One SS | 1986–1989 | 27-47644-1 |
| MerCruiser | SSM | 1982–1995 | 27-47644-1 |
| MerCruiser | I | 1982–1995 | 27-47644-1 |
| MerCruiser | II | 1982–1995 | 27-47644-1 |
| MerCruiser | IV | 1982–1995 | 27-47644-1 |
| MerCruiser | V | 1982–1995 | 27-47644-1 |
Technical Specs
- Product Type
- Power Trim Hose Connector Plate Gasket
- Installation Location
- Power Trim Hose Connector Plate
- Product Dimensions
- 1.13 in x 5.13 in x 4.0 in
- Weight
- 4.54 g (0.16 ounces)
What’s in the Box
- 1 x Power Trim Hose Connector Plate Gasket (Replaces MERCURY MARINE 27-47644-1)
Installation Notes
- Disconnect the vessel's battery and ensure the engine is completely off.
- Locate the power trim assembly and identify the hose connector plate.
- Thoroughly clean the area around the plate to prevent contaminants from entering the hydraulic system.
- Carefully disconnect the hydraulic hoses and remove the mounting bolts for the connector plate.
- Remove the old gasket and discard it.
- Inspect the mating surfaces of both the housing and the plate for any corrosion, nicks, or debris. Clean them until smooth.
- Position the new gasket, ensuring all bolt holes and passages are correctly aligned.
- Reinstall the connector plate, tightening the bolts to the manufacturer's specified torque in a star or crisscross pattern.
- Reconnect the hydraulic hoses and check the trim fluid level, refilling as necessary.
- Reconnect the battery, then operate the power trim system multiple times while carefully checking for any leaks around the newly installed gasket.
Troubleshooting & FAQ
How do I know if this gasket fits my MerCruiser model?
This gasket is designed for various MerCruiser sterndrives, including Alpha One SS (1986–1989) and models I, II, IV, V, and SSM (1982–1995). The most reliable way to confirm fitment is to match your old part's number to one listed in our Part Number Matrix, such as the OEM reference 27-47644-1.
What are the signs of a failing power trim hose gasket?
Common symptoms include visible hydraulic fluid leaks around the trim hose connector plate, a spongy or unresponsive power trim system, or a recurring need to top off the hydraulic fluid reservoir.
Is any special sealant required when installing this gasket?
Generally, this type of gasket is designed to be installed dry. Applying sealant is not typically recommended as it can interfere with the seal. Always consult your official service manual for procedures specific to your sterndrive model.
How often should this gasket be replaced?
There is no fixed service interval for this gasket. It should be replaced whenever the power trim hose connector plate is removed for service or if any leaks are detected from the connection point.
What is the difference between this part and the original Mercury part 27-47644-1?
This is a high-quality aftermarket part designed to meet or exceed original equipment specifications for fit, form, and function. It offers a cost-effective alternative to the OEM gasket without compromising on material quality or performance.
My engine isn't listed, but the part number matches. Can I use it?
If your original gasket's part number is listed as an equivalent (e.g., 27-476441, 27-47644), it is highly likely to fit. However, we always recommend verifying compatibility against the specific engine models listed for a guaranteed fit.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs 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 in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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