Not to hog the thread or to drift too far off topic.
3 slit type water pump housing uses a standard seal part number
The two oscillator type water pumps use a packing material.
Plumbing valve stem packing is ideal…if you can get by the
ingredient in title. For those that want originality, I am pretty sure
factory installed this type material.
Louis
Twin cylinder gear case requires 2 thin steel shims ahead of prop
shaft gear. These are often left out or rusted. McMaster Carr and
others will have 0.010″ thick for loose fit on 0.500″ shaft.
