Genuine Cummins Onan starter solenoid relay for BGE, BGM, and NHM series Emerald and Marquis RV generators. 12V DC, 1.4 kW. 1/4" quick-connect male spades for control wires. Verify part number from your generator's solenoid bracket before ordering. 90-day limited warranty.
The Cummins Onan 307-2570 is a genuine OEM starter solenoid relay for BGE, BGM, and NHM series Onan Emerald and Marquis RV generators. The solenoid relay serves as the electrical switch that routes high-current power from the battery to the starter motor when the start command is given — it is the component that produces the characteristic "click" when the start button is pressed without the engine turning over.
A failed solenoid relay is one of the most common causes of a no-start condition on these generator models. When the solenoid fails, the starter motor does not receive power even if the battery is fully charged — producing either a single click and no crank, or no response at all. Replacing the solenoid is typically the first electrical diagnostic step for a no-crank, no-start condition.
Important: Multiple solenoid part numbers are used across the Onan Emerald and Marquis generator range. Always verify the correct replacement by checking the part number stamped on the metal bracket of your existing solenoid before ordering.
Rated at 12V DC / 1.4 kW — the correct electrical specification for the starter solenoid circuit on BGE, BGM, and NHM series Onan generators
1/4" quick-connect male spade terminals on the front for the control wire connections — matches the OEM wiring harness connectors on compatible generator models
Cummins Onan factory solenoid — not aftermarket; built to original electrical specifications for proper starter engagement and long-term reliability
A failed solenoid is a leading cause of no-crank, no-start conditions on Onan generators — typically presents as a single click when the start button is pressed
Several different starter solenoid part numbers are used across the Onan Emerald and Marquis generator range — they are not interchangeable. Installing the wrong solenoid can result in a no-start condition or damage to the starting circuit. How to confirm the correct part: 1. Locate the starter solenoid on your generator 2. Find the metal mounting bracket on the solenoid body 3. Read the part number stamped directly into the bracket 4. Confirm it matches 307-2570 before ordering Alternatively, consult your generator's service manual or contact an authorized Onan dealer with your full model number and spec letter to confirm the correct solenoid for your unit. Note: This solenoid fits BGE, BGM, and NHM series generators — these are the older Onan Emerald and Marquis gasoline families. It is not the solenoid for the newer HGJAB (Marquis Gold) or HGJAC (Emerald Advantage) series.
• One (1) 307-2570 Starter Solenoid Relay Mounting hardware and wiring connectors are not included. The solenoid mounts using the existing bracket and connects to the generator's starter wiring harness using the 1/4" quick-connect terminals.
Backed by a 90-day limited manufacturer's warranty against defects in materials and workmanship. Retain your purchase receipt and note the installation date for any warranty service requests.