Concentric Engineering Engine Coolant Water Pump - Cummins B Series Style - Used

Engine coolant / circulation water pump with a cast-iron two-bolt mounting flange and cast "Concentric Engineering" maker mark, plus cast numbers 3286603, 4956, and 52-101 (casting/foundry marks, not confirmed orderable part numbers). **Application:** Believed to be from the Cummins B-series (3.9L/5.9L) diesel coolant pump family used in marine, industrial, and equipment installations — application is NOT verified and is offered by photographs, cast identifiers, and dimensions only. **Condition:** Used, untested take-off. Light-to-moderate surface rust on the flange and hub; casting numbers legible; no cracks or broken flange ears observed. Shaft, seal, and impeller have not been flow- or pressure-tested. Mounting gasket/O-ring not included. Pump will be drained and the flange opening covered before shipping. Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability. 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.