Boat owners, listen up! If your Cummins marine diesel engine (like the popular 6BTA5.9 or 6CTA8.3 models, in the 210-450HP range) is overheating or the raw water pump isn't moving enough coolant, a worn impeller is the #1 suspect. This is a direct replacement impeller that matches several OEM part numbers: 27000K (Sherwood), 3974456 (Cummins), 500181 (CEF), and 27 (SMX Super). It's designed to fit specific Sherwood pump models (P2708X, P2701-01, P2702-01, and many others) and Cummins pumps #3897194 and 3866493. The impeller is made from durable neoprene rubber with 12 flexible blades and a solid brass hub. The key specs are: 3-5/16 inch (84.14mm) diameter, 2-7/8 inch (74mm) depth, with a 3/4 inch (19.05mm) shaft diameter and an 11-spline drive. Replacing this is critical annual maintenance. A soft, cracked, or missing blade can kill your water flow and lead to serious engine overheating. Always keep a spare onboard! If you're unsure about the exact match for your engine, providing your engine's serial number is the best way to confirm.
Free 30-day returns 
Free 30-day returns
