What impeller fits the WG-4? I've got an old one I'm trying to get running and would like to make sure the water pump works....don't even know what it looks like until I take it apart.

Grubbs has impellers that will fit Mercurys and
Wizards, Brian Wilcox makes impellers and wobblers
for prewar and post war Mercury, Sea King and Wizards (all Mercury made)