Transom Seal Boot 22-Hole – Fits OMC Stringer 1978–1986 (Replaces OMC 909527)
Transom Seal Boot 22-Hole – Fits OMC Stringer 1978–1986 (Replaces OMC 909527) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Transom Seal Boot 22-Hole – Fits OMC Stringer 1978–1986 (Replaces O...
Transom Seal Boot 22-Hole – Fits OMC Stringer 1978–1986 (Replaces OMC 909527) is backordered and will ship as soon as it is back in stock.
Product Details
This Transom Seal Boot 22-Hole is designed for OMC Stringer Sterndrive units manufactured between 1978 and 1986. It installs on the transom plate to help create a durable, watertight seal where the sterndrive assembly connects to the hull.
This aftermarket replacement is identified as a replacement for OMC part number 909527. Additional commonly referenced numbers are listed below for cross-reference only; always verify the bolt-hole pattern and the original part before ordering.
- Designed for a 22-bolt-hole transom plate pattern.
- Black rubber construction suitable for marine service.
- Package includes one transom seal boot.
Part Number Matrix
Use the following references as a cross-reference aid. Part-number listings do not replace verification of the drive model, year, transom plate, and bolt-hole pattern.
| Brand | Part Number |
|---|---|
| OMC | 909527 |
| OMC | 0909527 |
| Sierra | 18-2768 |
| Mallory | 9-72812 |
| GLM | 86710 |
| EMP | 26-08671 |
| BJKIEW | 106 |
| MTC | 50038 |
Engine & Model Compatibility
Confirm your engine or sterndrive model, production year, OEM reference, and transom plate configuration before ordering.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| OMC | Stringer Sterndrive | 1978–1986 | 909527 / 0909527 | 22-hole version |
Technical Specs
- Product Type
- Transom Seal Boot
- Application
- OMC Stringer Sterndrive units from 1978–1986
- Configuration
- 22 bolt holes
- Installation
- Bolts to the transom plate using the matching 22-hole pattern
- Material
- Rubber
- Color
- Black
- Part Type
- Aftermarket replacement, not an OEM component
- Warranty
- 90 days against manufacturing defects under normal use
What’s in the Box
- 1 x Transom Seal Boot
Installation Notes
- Disconnect the battery and follow all applicable safety precautions before starting work.
- Access the transom assembly. Removing the sterndrive unit may be necessary; follow the manufacturer's service manual.
- Carefully unbolt and remove the old transom seal boot, noting its orientation and the position of the 22 bolts.
- Clean the mounting surfaces on the transom plate thoroughly, removing old sealant, dirt, and debris.
- Apply a marine-grade sealant recommended for this application to the mounting surface or the new boot, as specified by the service instructions.
- Position the new 22-hole seal boot and confirm that every bolt hole aligns correctly before tightening.
- Install and tighten the bolts in a crisscross pattern to the torque specified in the service manual to achieve an even seal.
- Reassemble the sterndrive components and reconnect the battery.
- After launching, inspect the transom area and bilge for signs of water leakage.
Troubleshooting & FAQ
How do I confirm this boot fits my OMC Stringer drive?
This boot is listed for the 22-hole transom plate used on OMC Stringer Sterndrive models from 1978–1986. Verify the drive year, the applicable OEM reference, and the number and arrangement of bolt holes on your existing transom plate before ordering. A different bolt pattern will not fit correctly.
What are the signs my old transom seal is failing?
Common signs include water entering the bilge, visible cracks, perishing, hardening, or deformation of the rubber boot, and deterioration around the mounting area. A compromised seal should be inspected and replaced promptly.
How often should a transom seal boot be replaced?
There is no universal replacement interval. Inspect the boot at least annually and whenever the sterndrive is serviced. Replace it if you find cracking, stiffness, deterioration, deformation, or evidence of water leakage.
Is this boot different from other OMC versions?
Yes. This listing is for the 22-hole version identified for 1978–1986 OMC Stringer drives. Other applications may use a different bolt pattern, including versions with fewer holes. Match the hole count and arrangement to your transom plate, and use the OEM reference 909527 as an additional cross-reference.
Is this an OEM part?
No. This listing is for an aftermarket replacement transom seal boot. Confirm the dimensions, bolt-hole pattern, and application before installation.
What are the shipping options?
Worldwide shipping options are shown at checkout. Standard delivery is typically estimated at 5–15 days, although actual transit times may vary by destination, carrier, customs processing, and service selected.
What is the warranty and return policy?
The listed warranty is 90 days against manufacturing defects under normal use. Returns are subject to the applicable store policy and may require the item to be unused and in its original condition. Contact support with your order details before sending an item back.
Safety & Important Info
- Verify the drive model, year, OEM reference, dimensions, and bolt-hole pattern against your original part before purchase.
- Do not install the boot if the hole pattern or overall configuration does not match your transom plate.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended, particularly when sterndrive removal or transom disassembly is required.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for practical service use and real-world marine conditions.
- Fast Global Fulfillment — Shipping options are available to most regions, with estimated delivery shown at checkout.
- Manufacturer-Direct Value — We aim to provide practical replacement solutions with consistent product specifications.
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