Frank, any idea why the gasket and the plate has this hole? I see the hole is just above the water passage on the return side but the head has nothing.
The head does not have a hole that matches it. See pictures below: realize the head is upside down. If there was a hole it would be somewhere in the red circle I drew.

I was thinking that the mystery hole might be a universal fitting gasket and plate that may work on a different model. Is that correct?

The original gasket seemed to also have this hole.

Another question: what would be the purpose of the extra water passage Chanel that goes passed the inlet and outlet areas. See third picture of pump passage highlighted in green. Yellow square shows about where the water return hole is in the plate and gasket.

• This reply was modified 3 years, 8 months ago by NBD925.

Any one know what that torque might be or do I just use a general accepted torque value For that size nut and thread?

Ok, a few new problems have popped up. I ordered a water pump from Brian Wilcox and it just arrived. But . . . The pump overall size is much smaller than the original. See attached pictures. Should I be asking for a different thing? Maybe it was just a mix up or maybe he just doesn’t make one for this 1948 Hiawatha 5hp. I have not herd back from Brian yet but will let you guys know when I do.

Next problem is the Prop. When I installed the prop and the new rubber clutch ring there was still some side to side play and some play in and out on the prop shaft. I tightened the prop nut and it looks like the shear pin was bending into a U before anything got tight. Any ideas here? I was thinking maybe the (Propeller Clutch Hub) was worn out.

How tight should the prop nut be? I tighten the nut by hand until the pin hole lines up and then how much tighter do you make the nut? Is there a general rule for all prop nuts?

• This reply was modified 3 years, 7 months ago by Mumbles.