Most older outboards including your Wizard WD4 use GREASE in gear case.
Lubriplate 105 or John Deere Corn Head Grease are usual suggestions.
Oil probably will leak out.
As better manufacturing and seal technology developed oil did become standard
gear case lube. Even so sometimes a later model will have grease substituted for oil due to leakage thru worn shafts and seals. .
Thanks for the additional input. That's a 105 weight grease? I started the motor tonight and it ran like a top! I guess I need to get some grease and re-fill the lower unit.
Lubriplate 105 is a motor assembly grease available at Napa auto stores. It is handy, as it comes in a big "toothpaste" tube that has a nozzle convenient to apply it into the gearbox hole.
I would guess the viscosity to be slightly above 105, but what do I know.
