Stanadyne DB4 Series Diesel Fuel Injection Pump (Model DB4-4937 per Tag) - Used

Stanadyne DB-series mechanical diesel fuel injection pump, removed from service and offered as an untested used unit. The attached shop tag identifies it as model DB4-4937, serial 696304, 1500 RPM — a specification consistent with a 4-cylinder diesel engine or generator-set application, though the application has not been verified and the data-plate stampings are only partially legible in the photos. Application: unverified 4-cylinder diesel engine / genset use; identified from Stanadyne data plates and the accompanying tag only. Condition: Used, complete-appearing, untested. Governor linkage, cover plates and outlet fittings are present; light dirt and minor surface rust on steel hardware. No bench test, calibration sheet, or run history is available — treat as an untested pump / rebuildable candidate requiring bench testing and calibration by a qualified diesel injection shop. Pump will be drained and ports capped for shipping. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.