Arco Starting & Charging Solenoids

Arco Starting & Charging Solenoids: Precision-Engineered for the Marine Environment

When your engine refuses to turn over, a faulty solenoid is often the culprit — and on the water, that's the last place you want an electrical failure. Arco Starting & Charging has been one of the marine industry's most trusted names in starting and charging systems since 1960, and their line of marine solenoids reflects decades of hard-won experience engineering parts that perform reliably in one of the harshest electrical environments imaginable.

A Legacy Built on Testing and Reliability

What separates Arco from generic aftermarket suppliers is their rigorous quality philosophy. Nearly 60 years ago, Arco set the gold standard for marine engine parts, testing and retesting every unit manufactured beyond normal operating conditions to ensure they deliver the highest quality, most reliable parts available. Arco Marine manufactures, quality-tests, and warehouses its parts right here in the USA. That domestic production model gives Arco direct control over every step of the process — from coil winding to final inspection.

What Makes Arco Solenoids Stand Out

A marine solenoid has to do more than just close a circuit — it has to do it thousands of times in a salt-air, high-vibration, moisture-heavy environment without corroding, seizing, or failing at the worst possible moment. Arco's solenoids are engineered specifically for these demands.

• Heavy-duty coil & contact assembly: Arco's HD solenoid models feature a heavy-duty coil and contact assembly with a larger contact area, high-temp housing for less distortion, molded-in studs for precise contact, and a high-temp coil assembly.
• Isolated and grounded base configurations: Arco offers both isolated-base and grounded-base solenoids, ensuring the right electrical configuration for a wide range of engine setups. The SW097, for example, is a 12-volt, isolated-base solenoid with a white housing designed specifically for Mercury and MerCruiser applications.
• Broad OEM cross-reference coverage: Arco's solenoid lineup spans applications for Chrysler, Volvo Penta, MerCruiser, Mercury, OMC, and more , with direct OEM part number cross-references so you can find the exact replacement with confidence.
• 12-volt systems: All Arco solenoids in this lineup are designed for standard 12-volt marine DC systems, the most common electrical architecture across outboard and sterndrive engines.

Engine Compatibility You Can Count On

One of the practical strengths of Arco's solenoid range is the depth of its fitment coverage. Whether you're maintaining a MerCruiser sterndrive, an OMC outboard, or a Volvo Penta inboard, Arco has a direct-replacement solenoid engineered to match the original spec. Team Arco is comprised of industry leaders and experts with decades of experience building — and improving — rotating electrical parts , and that expertise shows in the precise fitment and OEM-grade performance of every solenoid they produce.

For boaters and marine technicians alike, the value of a reliable solenoid can't be overstated. It's the electrical gatekeeper between your battery and your starter motor — and getting that component right means fewer failed starts, fewer emergency calls, and more time on the water. Browse the full selection of marine solenoids or explore everything Arco Starting & Charging has to offer across their complete lineup of marine electrical components.