3072586 Starter Solenoid Relay

FOXSTAR 3072586 starter solenoid relay is a direct-replacement electromagnetic switch designed to restore reliable starter power on compatible Cummins Onan RV generators.

When a generator won't crank or the starter circuit behaves inconsistently, the solenoid relay is often the culprit. This FOXSTAR unit replaces part numbers 307-2570, 307-1617 and 307-0845 and is built to deliver the high-current switching needed to engage your generator's starter motor. It combines corrosion-resistant copper internals with a flame-retardant ABS housing so it stands up to vibration, heat and typical RV service environments.

How does this relay restore starter performance?

The solenoid acts as an electromagnetic gateway between the battery and starter motor, enabling a large current flow only when the ignition circuit calls for it. Replacing a worn or failed solenoid with this FOXSTAR unit returns reliable engagement and consistent starting behavior.

• Directly replaces 307-2570, 307-1617, 307-0845 and equivalent part numbers.
• Copper windings and contacts for strong conductivity and minimal voltage drop.
• Quick plug-and-play swap with the original mounting and terminal layout.

What materials and construction extend its service life?

The relay uses an ABS plastic enclosure rated for high insulation and flame resistance, while internal copper components resist oxidation and maintain stable conductivity under load. This construction helps it tolerate exposure to oil, dust, and temperature swings common in RV generator compartments.

• Flame-retardant ABS housing reduces heat-related risks.
• Anti-oxidizing copper coil and contacts for long-term electrical stability.
• Robust build designed for vibration resistance in vehicle-mounted use.

How easy is installation and compatibility with my generator?

Installation is intended to be straightforward: remove the old solenoid, position the replacement, and reconnect the terminals. Because this part is engineered to match the common Cummins Onan relay geometry and terminal layout, it fits many RV generator models that used the original part numbers.

• Compatible with Cummins Onan RV generators using listed part numbers.
• Same terminal configuration for a simple swap—no special tools required beyond basic hand tools.
• Plug-and-play fit minimizes downtime during repairs.

What practical checks should I do after installing the solenoid?

After fitting the FOXSTAR relay, verify firm terminal connections and test starter operation under normal conditions. Listen for a clean click when the ignition engages and confirm the starter receives battery voltage without excessive voltage drop.

• Confirm tight, corrosion-free battery and starter terminal connections.
• Measure voltage at the starter during crank to ensure proper current delivery.
• Inspect mounting and routing to prevent chafing or heat exposure.

Who is this for: technicians, RV owners and mobile mechanics who need a dependable replacement solenoid for Cummins Onan generators will find the FOXSTAR 3072586 an effective, drop-in solution. It’s best for those seeking a durable, easy-to-install relay that matches legacy Onan part numbers and restores consistent starting performance without lengthy downtime.