Reply To: KG7 Impeller Question

Home › Forum › Ask A Member › KG7 Impeller Question › Reply To: KG7 Impeller Question

February 4, 2026 at 2:16 pm #304305
A. Hoskins
Participant

    US MEMBER PAY BY CHECK

    Good point. I agree that the raised portions as shown do have a function but I don’t think they are absolutely necessary.

    When I reduce the section height of the impeller I also cut back the brass center with a Dremel using a bit that kinda looks like a little end mill. It is time consuming. The water pump covers are easy to refinish – the cartridge, not so easy, mostly I don’t bother.

    The difference between the 5/8′ and 9/16″ shafts is approximately .06″. I use .03″ (same approximation) brass shim stock epoxied in place and cut to clear the pin.

    Just seems to me that the impeller spinning around in the cartridge at a thousand RPM doesn’t require a real precise fit.

    Certified JB weld