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Fuel Connector Cap – Fits Mercury 4–30 HP (Replaces 878311)
- $19.99
$23.00- $19.99
- Unit price
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Fuel Connector Cap – Fits Mercury 4–30 HP (Replaces 878311)
This cap seals the fuel connection on integral fuel tanks for various Mercury outboard engines. It is designed for Mercury models from 4 HP to 30 HP, primarily 4-stroke engines, providing a secure fit to prevent fuel leaks and contamination.
This part is a direct replacement for Mercury 878311, Suzuki 65727-91JL0, Tohatsu 3H6-70262-0, and QuickSilver 878311.
- Installation Method: Simple screw-on design
- Housing Material: Durable black rubber construction
- Application: Designed for use with integral (built-in) fuel tanks
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 878311 |
| Suzuki | 65727-91JL0 |
| Tohatsu | 3H6-70262-0 |
| QuickSilver | 878311 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | Multiple | 4 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 5 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 6 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 8 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 9.9 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 10 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 15 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 20 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 25 | 4-Stroke | 878311 | For integral fuel tanks |
| Mercury | Multiple | 30 | 4-Stroke | 878311 | For integral fuel tanks |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Fuel Connector Cap |
| Installation | Screw-on |
| Fuel Type | Gasoline |
| Connection | Integral fuel tank inlet |
| Housing Material | Rubber |
| Housing Color | Black |
| Other Technical Attributes | For use with integral (built-in) fuel tanks |
Package Contents
Includes:
- 1 x Cap (878311)
Installation Guide
- Safety First: Ensure the engine is completely off and cool to the touch.
- Locate Inlet: Identify the fuel inlet connection on the outboard's integral fuel tank.
- Clean Area: Wipe the area around the inlet clean to prevent debris from entering the fuel system.
- Remove Old Cap: Unscrew the old or damaged cap.
- Install New Cap: Align the new cap with the threads on the fuel inlet and screw it on by hand.
- Secure Firmly: Tighten until snug to create a proper seal. Do not overtighten, as this can damage the rubber or the tank threads.
Troubleshooting & FAQ
Q: How do I confirm this cap fits my engine?
A: This cap fits a wide range of Mercury 4-stroke outboards from 4 HP to 30 HP that use an integral fuel tank. The best way to confirm is by matching your old part number to the ones listed in our cross-reference table: Mercury 878311, Suzuki 65727-91JL0, or Tohatsu 3H6-70262-0.
Q: What are the signs that my fuel connector cap needs replacing?
A: Common signs include visible cracks or brittleness in the rubber, a loose fit that won't tighten properly, or the smell of fuel fumes around the tank, indicating a poor seal.
Q: Is this rubber cap resistant to ethanol-blended fuels?
A: Yes, it is made from modern rubber compounds designed to be resistant to gasoline and common ethanol blends, preventing premature swelling or deterioration.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build 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.
Мы осуществляем доставку практически по любому адресу в мире, при этом для большинства регионов доступна бесплатная доставка.
Для наших типичных клиентов из США и Канады сроки доставки следующие:
- Amazon FBA : заказы будут доставлены в течение 1–5 рабочих дней после размещения заказа (в определенные особые периоды, такие как крупные акции, Рождество и т. д., время доставки Amazon FBA может быть изменено).
- Доставка со склада в США : заказы будут доставлены в течение 7 дней после размещения заказа.
- Доставка со склада в Китае : заказы будут доставлены примерно через 12 дней после размещения заказа.
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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