Spring Kit – Fits Mercury Alpha One Gen II & Bravo Drives (Replaces 24-17997A1)
Spring Kit – Fits Mercury Alpha One Gen II & Bravo Drives (Replaces 24-17997A1) is backordered and will ship as soon as it is back in stock.
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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
Spring Kit – Fits Mercury Alpha One Gen II & Bravo Drives (Repl...
Product Details
This Spring Kit – Fits Mercury Alpha One Gen II & Bravo Drives (Replaces 24-17997A1) contains a stainless steel spring and check valve assembly. It is specifically designed for use in Mercury Marine Alpha One Generation 2 (1991 and newer) and all Bravo (I, II, III) sterndrive units, ensuring reliable performance and fitment.
This kit serves as a direct replacement for Mercury OEM part 24-17997A1 and aftermarket equivalents Sierra 18-2715 and GLM 12930.
- Engineered as a direct replacement for easy installation.
- Constructed from durable stainless steel for corrosion resistance.
- Includes a high-performance Viton seal for superior sealing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 24-17997A1 |
| Sierra | 18-2715 |
| GLM | 12930 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is compatible with a wide range of sterndrives from Mercury Marine. Verify your model and serial number to ensure correct fitment.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| Mercury | Alpha One Gen II | 1991–1995 | 24-17997A1 | Serial #0D469859 thru 0F679999 |
| Mercury | Alpha One Gen II | 1996–1997 | 24-17997A1 | Serial #0F680000 thru 0K999999 |
| Mercury | Alpha One Gen II | 1998 & Up | 24-17997A1 | Serial #0L100040 & Up |
| Mercury | Blackhawk | 1994–1995 | 24-17997A1 | All |
| Mercury | Bravo | 24-17997A1 | Serial #0M100001 thru 0W249999 | |
| Mercury | Bravo One | 24-17997A1 | Serial #0W250000 & Up | |
| Mercury | Bravo Drives | 24-17997A1 | Serial #0B664190 thru 0F729999 | |
| Mercury | Bravo Sterndrives | 24-17997A1 | Serial #0F730000 thru 0M100000 | |
| Mercury | Bravo Two | 24-17997A1 | Serial #0W250000 & Up | |
| Mercury | Bravo Three | 24-17997A1 | Serial #0W250000 & Up | |
| Mercury | Bravo X One | 24-17997A1 | Serial #0M100001 thru 0W249999 | |
| Mercury | Bravo X Three | 24-17997A1 | Serial #0M100001 thru 0W249999 | |
| Mercury | Bravo X Two | 24-17997A1 | Serial #0M100001 thru 0W249999 | |
| Mercury | Bravo XR One | 24-17997A1 | Serial #0W240000 & Up | |
| Mercury | Bravo XR One | 24-17997A1 | Serial #0L914990 thru 0W239999 | |
| Mercury | Bravo XR Sportmaster | 24-17997A1 | Serial #0M906878 & Up | |
| Mercury | Bravo XR Sportmaster | 24-17997A1 | Serial #0M052945 thru 0M906877 | |
| Mercury | Bravo XR Three | 24-17997A1 | Serial #0W240000 & Up | |
| Mercury | Bravo XZ One | 24-17997A1 | Serial #0L914990 thru 0M999999 | |
| Mercury | Vazer Drive | 24-17997A1 | Serial #0W995000 & Up | |
| Mercury | Vazer Transom | 24-17997A1 | Serial #0W755000 & Up |
Technical Specs
- Product Type
- Spring Kit / Check Valve Kit
- Installation
- Direct replacement
- Housing Material
- Stainless steel
- Housing Color
- Silver
- Dimensions
- 4.0" H x 5.13" W x 0.31" L
- Weight
- ~0.023 kg (0.81 oz)
- Warranty
- Varies by supplier
- Other Technical Attributes
- Includes Viton seal (per some aftermarket versions)
What’s in the Box
- 1 x Spring Kit (24-17997A1)
Installation Notes
- Ensure the engine is switched off and the sterndrive is trimmed to a safe and accessible position.
- Following your official service manual, locate and access the driveshaft housing where the check valve is located.
- Carefully remove the old spring and check valve assembly, noting its orientation.
- Clean the housing seat of any old sealant, debris, or corrosion.
- Install the new spring kit, ensuring the check valve and included Viton seal are correctly oriented.
- Reassemble all components, tightening fasteners to the manufacturer's specified torque values.
- Once assembled, perform an operational check before returning the vessel to service.
Troubleshooting & FAQ
How do I know if this spring kit will fit my drive?
This kit is designed for Mercury Alpha One Gen II (1991 and newer) and all Bravo series sterndrives. To guarantee fitment, please verify your model and serial number against the compatibility chart on this page. The OEM part number this replaces is 24-17997A1.
What are the symptoms of a failed check valve spring?
A faulty spring or check valve can cause issues with water pressure regulation within the drive, potentially leading to improper cooling, water intrusion into the gear lube, or other drive-related failures. Symptoms may include inconsistent engine temperatures or contaminated gear oil.
Is the included seal made of Viton?
Yes, our aftermarket version includes a high-quality Viton seal. Viton offers excellent resistance to heat, chemicals, and fuel, often exceeding the durability and performance of standard OEM seals.
What is the recommended replacement interval?
There is no strict replacement schedule for this part. It is typically replaced on a conditional basis during other drive service (e.g., water pump replacement) or if symptoms of failure are observed.
Can I install this myself?
While installation can be performed by individuals with strong mechanical skills and the correct tools, we recommend professional installation. This ensures correct placement and sealing, preventing potential damage to your sterndrive.
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.
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