Keep your diesel engine running safely and efficiently with this universal 12V fuel shut off solenoid. This heavy-duty solenoid comes complete with a connector cable for straightforward installation. Designed as a direct replacement for part numbers 3921978 and 3915502, this electric diesel engine cut off switch provides reliable fuel flow control. The durable construction features corrosion-resistant materials to withstand harsh engine environments. The integrated connector cable ensures a secure electrical connection, while the mounting bracket allows for stable installation. This solenoid serves as a critical safety component by enabling quick fuel shutoff when needed. Perfect for various diesel engine applications, this universal design makes it a versatile replacement part. The 12V operation matches standard vehicle electrical systems, ensuring compatibility across multiple engine types. Upgrade your engine's fuel control system with this dependable shut off solenoid for improved performance and safety.