Description
Product Overview
The Arco R809 is a high‑quality marine engine relay designed specifically for Volvo Penta applications. Constructed with a silver‑plated contact material, the relay delivers excellent conductivity and resistance to corrosion. It features a screw‑type connector, three terminals, and a normally open contact configuration, providing reliable circuit control in harsh sea conditions. Dimensions are compact at 6 x 4 x 2 inches and it weighs just one pound, making it easy to install in confined engine bays. The automatic operation mode simplifies wiring and reduces the need for additional control modules.
Usage
This relay is ideal for marine vessels equipped with Volvo Penta engines ranging from 3.0 L to 5.7 L models, including SX‑M‑MAC, MDA, MLT, 4.3GL‑E, 5.0GXi‑F and others. It thrives in salty, humid environments and is suited for both recreational boats and commercial vessels where dependable electrical performance is critical. Install the relay on the boat’s engine compartment using the provided screw mount; no special tools are required beyond a standard screwdriver.
Why Choose Us
Arco’s reputation for marine‑grade components ensures that the R809 meets stringent EU spare part availability standards for five years. The relay replaces multiple OEM part numbers (Sierra 18‑5700, Volvo Penta 3858081, 3858809), consolidating inventory and simplifying maintenance. Each unit undergoes rigorous testing for electrical endurance, vibration resistance, and temperature extremes, guaranteeing long‑term reliability. Our dedicated support team provides technical assistance and documentation to ensure a smooth installation process.
Key Features
- Silver‑plated contacts for superior conductivity and corrosion resistance
- Screw‑type connector with three terminals for easy wiring
- Automatic operation mode reduces wiring complexity
- Boat‑mount design fits securely in marine engine bays
- Five‑year EU spare part guarantee for peace of mind
FAQ
Is the R809 compatible with all Volvo Penta models?
It is compatible with a wide range of Volvo Penta engines from 3.0 L to 5.7 L, including the models listed in the product details. Always verify the engine series before purchase.
Can I replace multiple OEM relays with this single Arco unit?
Yes, the R809 replaces Sierra 18‑5700 and Volvo Penta part numbers 3858081 and 3858809, consolidating several functions into one reliable relay.
What maintenance is required for the relay?
The relay is sealed and requires no regular maintenance. Periodic visual inspection for corrosion or loose connections is recommended during routine engine service.
Does the relay need a separate power source?
The relay operates on the vehicle’s existing electrical system and does not require an additional battery; it uses the engine’s supply voltage.
How long is the warranty?
Arco provides a five‑year EU spare part availability guarantee, ensuring you can source replacements for the lifespan of the product.
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