Arco Starting & Charging Relays

Arco Starting & Charging Relays: Trusted Marine Electrical Performance

When a relay fails on the water, you’re not just dealing with an inconvenience — you’re facing a vessel that won’t start, a trim system that won’t respond, or a charging circuit that goes dark. That’s exactly why boaters and marine technicians turn to Arco Starting & Charging when they need a relay replacement they can trust. Arco has been the benchmark for marine starting and charging components since 1960, and their relays reflect the same exacting standards that have defined the brand for over six decades.

Built for the Marine Environment

Marine relays face conditions that land-based electrical components rarely encounter: constant moisture, salt air, vibration, and wide temperature swings. Arco addresses these demands head-on. Arco sets the standard for marine engine parts by testing and retesting every unit manufactured beyond normal operating conditions — a philosophy that applies equally to their relay lineup. The result is a component engineered to survive bilge splash, spray, and the humidity that characterizes life aboard a boat.

Arco’s relay catalog covers a wide array of popular outboard and sterndrive platforms. Their starter relays and tilt/trim relays are cross-referenced across major OEM families, including Mercury & Mariner, Johnson/Evinrude, Yamaha, Chrysler/Force, Volvo Penta, and OMC. A well-known example is the Arco R151, a 12-volt, 30-amp relay designed as a direct-fit replacement for Mercury and Mariner outboards — offering clean drop-in fitment without rewiring or adapter work. Similarly, the Arco SW774 is a grounded-base 12V solenoid relay that fits Chrysler, Force, Johnson, and Evinrude outboards as well as older OMC sterndrives, replacing original OEM part numbers from multiple manufacturers with a single quality unit.

OEM-Quality Replacement, American-Made Confidence

One of the qualities that sets Arco apart in the relays category is their commitment to domestic manufacturing and quality control. Arco manufactures, quality-tests, and warehouses parts right here in the USA, operating out of their large Pensacola, Florida facility. This gives them direct control over production consistency — something that matters enormously in marine electrical components, where a substandard contact or a poorly sealed housing can mean a no-start situation miles offshore.

Arco’s application guides make it straightforward to cross-reference your existing OEM part number and find the correct Arco relay replacement, whether you’re matching a Mercury, Yamaha, or OMC spec. Team ARCO is comprised of industry leaders and experts with decades of experience building — and improving — rotating electrical parts, and that expertise extends into their relay and solenoid product lines as well.

The Right Relay for Every Outboard and Sterndrive

Whether you need a starter relay to ensure reliable cranking, a tilt/trim relay to keep your drive system responsive, or a replacement solenoid for an older OMC installation, Arco’s relay selection covers the most common marine applications in a compact lineup of high-quality parts. For boaters who demand OEM fitment with aftermarket reliability, Arco Starting & Charging relays are a proven choice backed by a legacy of marine electrical excellence.