MMI 502 flange pump (water pump flange gasket included)

This pump is a direct replacement for both the Oberdorfer N202M-07, and the N202M-03 flange pumps, as well as the Sherwood T-11165, and Jabsco 17120-0001.

NOTE:  MMI 502 flange pumps will also fit on Universal diesels which use pumps with these same part numbers.  However, four-bolt mounting versions of these pumps will require an adapter kit:  https://moyermarine.com/product/diesel-water-pump-adapter-kit-dies_01_560/

The inlet and outlet on this pump are 3/8″ pipe thread, and it is otherwise interchangeable with the early gear type pumps, as well as any of the later OEM flexible impeller pumps used by Universal.

The shaft, which is made from 17-4 stainless steel, is retained between two packless ball bearings , which eliminates the need for the small snap ring on the outside of the impeller to prevent the shaft from floating. The grease cup/fitting has also been eliminated by the packless bearings, making it unnecessary to periodically grease the pump.

The pump includes an MMI Quick-Change back plate to facilitate on-boat replacement of the impeller. The Quick-Change back plate is designed with an o-ring and 4 captive thumb screws. The captive feature of the thumb screws prevents them from being dropped into the bilge when removing or replacing the cover.

This pump has been designed to use the same shaft lip seal and impeller used in the Oberdorfer 202 and 201 series pumps. We recommend replacing your raw water pump impeller every 200 hours or after every second season (every 300 hours or every third season for FWC system fresh water pumps).

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Manufactured in the USA