Mercruiser Ignition & Fuel Pump Relay Replaces 86-865202T 18-5851 807057T
86-865202T
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Mercruiser Ignition & Fuel Pump Control Relay
Reliable Replacement for 4.3L, 5.0L, 5.7L, 6.2L, 7.4L+ Mercruiser Engines
Restore optimal performance and starting reliability to your Mercruiser marine engine with this high-quality aftermarket Ignition and Fuel Pump Control Relay. Designed as a direct fit replacement, this essential electrical component ensures consistent power delivery to your ignition system and fuel pump, critical for smooth engine operation and efficient fuel supply. Don't let a faulty relay leave you stranded on the water – invest in a dependable replacement.
Crafted to meet or exceed OEM specifications, this relay offers exceptional durability and longevity in demanding marine environments. Its robust construction resists corrosion and wear, providing peace of mind and reliable control for years to come. Easy to install, it integrates seamlessly into your existing electrical system, getting you back on the water faster.
Key Features
- ✔ Direct OEM Replacement: Seamlessly replaces Mercruiser 86-865202T, 18-5851, 807057T, and more, ensuring perfect fit and function.
- ✔ Robust Marine-Grade Construction: Built with high-quality materials to withstand harsh marine environments, including salt, moisture, and vibrations.
- ✔ Optimized Engine Performance: Ensures consistent ignition and efficient fuel delivery for reliable starting and smooth engine operation.
- ✔ Easy, User-Friendly Installation: Designed for straightforward replacement, minimizing downtime and simplifying maintenance.
Technical Specs
| Voltage: | 12V |
| Function: | Ignition & Fuel Pump Control |
| Design: | Shrouded for protection |
Vehicle Fitment Guide
| Make | Engine Series/Size | Year Range |
|---|---|---|
| Mercruiser | 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.1L, 8.2L (6/8 Cyl) | 1994-Up |
| Mercruiser | 3.0L, 4 Cyl, V6, V8 GM Marine Engines | Various (Please cross-reference OEM) |
| Mercruiser | 5.7L Black Scorpion, 350 Scorpion, 6.2L Black Scorpion, Scorpion 377 | 2006-Current |
OEM Part Number Cross Reference
| Mercruiser | 86-865202T, 807057T, 807057, 8M0210756 |
| Sierra Marine | 18-5851 |
| Recmar | REC86-865202T |
Frequently Asked Questions
What does this Mercruiser relay control?
This relay is primarily designed to control the ignition system and fuel pump on various Mercruiser marine engines. It may also play a role in starting and main power circuits depending on the specific engine model.
Is this an OEM Mercruiser part?
No, this is a high-quality aftermarket replacement relay. It is engineered to meet or exceed the performance and specifications of the original Mercruiser OEM part numbers 86-865202T, 18-5851, and 807057T, offering a reliable and cost-effective alternative.
How do I know if this relay is compatible with my Mercruiser engine?
This relay is compatible with a wide range of Mercruiser marine gasoline engines from 1994 onwards, including 3.0L, 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.1L, and 8.2L models. To ensure precise fitment, always cross-reference the OEM part numbers from your existing relay or engine manual with the cross-reference list provided.
Why is a shrouded relay design beneficial for marine applications?
A shrouded relay features a protective cover around its terminals, which is crucial in marine environments. This design helps shield the electrical connections from moisture, salt spray, dirt, and debris, significantly enhancing the relay's durability and preventing premature failure due to corrosion or short circuits.
Note: Please verify your vehicle model and year before purchasing.
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