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2895 321480 318973 Oil Seal for OMC | JLM Marine
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Oil Seal for OMC Gearcase – OEM Quality Aftermarket Replacement
This high-quality gearcase oil seal is engineered to fit OMC marine engines, ensuring reliable sealing performance and protection against fluid leakage. Manufactured to OEM specifications, this aftermarket replacement delivers dependable service for your lower unit maintenance needs.
This seal directly replaces OMC part numbers 318973, 321480, and 0777541, as well as Sierra 18-2028, GLM 86170, and Mallory 9-76207. It is designed for straightforward installation in OMC gearcase assemblies.
- Precision-molded for secure fit and long-lasting seal integrity
- Compatible with OMC lower unit assemblies
- Single oil seal included per package
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| OMC | 318973 |
| OMC | 321480 |
| OMC | 0318973 |
| OMC | 0777541 |
| Sierra | 18-2028 |
| GLM | 86170 |
| Mallory | 9-76207 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Application |
|---|---|
| OMC | Gearcase Oil Seal For OMC Marine Engine |
Technical Specifications
| Specification | Value |
|---|---|
| Part Type | Gearcase Oil Seal |
| Application | OMC Marine Engine Lower Unit |
| Quality Grade | OEM Quality Aftermarket |
Package Contents
Your order includes:
- 1 × Oil Seal
Installation Guide
- Drain all gear oil from the lower unit and clean the gearcase housing thoroughly. Remove the old oil seal carefully using a seal puller or flat tool, taking care not to damage the seal bore.
- Inspect the seal bore and propeller shaft for scratches, burrs, or corrosion that could compromise the new seal. Clean and smooth surfaces as needed.
- Lightly coat the new oil seal lip and outer diameter with marine-grade gear oil. Ensure the seal is oriented correctly with the lip facing inward toward the gearcase.
- Use a seal driver or appropriately sized socket to press the seal squarely into the bore until it seats flush. Avoid cocking or tilting during installation.
- Reinstall the propeller shaft and related components per your engine's service manual. Refill the lower unit with the manufacturer-recommended gear oil to proper level.
- Check for leaks after reassembly and during initial operation. If seepage occurs, verify seal installation and inspect for housing damage.
Troubleshooting & FAQ
Q: How do I confirm this oil seal fits my OMC engine?
A: Cross-reference your original part number with the table above. If your current seal matches OMC 318973, 321480, 0777541, Sierra 18-2028, GLM 86170, or Mallory 9-76207, this replacement will fit. Always verify dimensions visually before installation.
Q: What are the signs that my gearcase oil seal needs replacement?
A: Common symptoms include visible gear oil leaking from the propeller shaft area, milky or contaminated gear oil (indicating water intrusion), or low gear oil levels between services. Replace the seal immediately if any leakage is detected to prevent lower unit damage.
Q: How often should I replace the gearcase oil seal?
A: Replace the seal whenever you service the lower unit, notice leakage, or during propeller shaft removal. Inspect the seal during every seasonal maintenance or after every 100 hours of operation, and replace if wear or hardening is evident.
Q: Can I reuse the old seal if it looks intact?
A: No, oil seals are single-use components. Even if visually intact, the seal lip loses elasticity and sealing capability once removed. Always install a new seal during reassembly to ensure proper protection.
Q: What is the difference between this aftermarket seal and the OEM version?
A: This is an aftermarket replacement part, not an OEM component. We manufacture 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.
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Для наших типичных клиентов из США и Канады сроки доставки следующие:
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- Доставка со склада в США : заказы будут доставлены в течение 7 дней после размещения заказа.
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Когда вы размещаете заказ, мы оценим даты отправки и доставки для вас на основе доступности ваших товаров и выбранных вами вариантов доставки. В зависимости от выбранного вами поставщика услуг доставки, предполагаемые даты доставки могут отображаться на странице расценок на доставку.
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Основанная в 2002 году, компания JLM Marine зарекомендовала себя как специализированный производитель высококачественных морских деталей, базирующийся в Китае. Наша приверженность совершенству в производстве заслужила нам доверие ведущих мировых морских брендов.
Как прямой поставщик, мы обходим посредников, что позволяет нам предлагать конкурентоспособные цены без ущерба качеству. Такой подход не только поддерживает экономическую эффективность, но и гарантирует, что наши клиенты получают наилучшую ценность напрямую от источника.
Мы рады расширить свое присутствие через розничные каналы, предлагая наш опыт и приверженность качеству непосредственно владельцам и любителям лодок по всему миру.
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