MMI 502 flange pump (water pump flange gasket included)
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 has also been eliminated by the packless bearings.
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 as Jabsco and Oberdorfer models, and the impeller is the same as those used in the Oberdorfer 202 and 201 series pumps.
NOTE: For Universal diesel owners, if you you’re currently using an Oberdorfer 202M-3 or 202M-7 pump, or the newest version of these pumps with an “N” prefix, your engine will already have the necessary adapting hardware that is required to convert to our MMI 502 Flange Pump. If you’re currently using a pump with four bolts in its mounting flange, you will need one of our adaptor plates and a shaft adaptor to convert to an MMI 502 Flange Pump (see product numbers DIES_01_560 and DIES_02_561.
Manufactured in the USA