Reply To: 1955 Mercury Mark 5 Impeller Replacement

[Rex Perry]

Dale,
I did remove the shift cable which was the key to getting to the pump impeller. Once I disassembled the water pump and removed the old impeller I found that the anti-rotation tab on the bottom side of the upper pump cover had been bent down 90 degrees. This part should be replaced but does not appear to be available.
My plan is to try to use a little heat and straighten the tab. If that does not work and the tab breaks I will either reattach a replacement or make a whole new cover.
The rest of the engine seems to be in good condition.
Rex