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Hello; I'm looking for the:
Impeller Spares Kit 110-10-B21 (white plastic with black 3 blade impeller) for B&G Speed Sensor Part Number 117-00-120 (31 mm dia) (circa 1974)

For greater clarity, I'm looking for the bit that sticks out and turns with the water flow. It has a screw style 3 blade impeller.

Alternatively, I'd settle for the B&G impeller to paddle whell converter.

Thanks, John