Leaking spa circulation pump

[cootcraig]

I pulled out my circulation pump to clear a leaf blockage in the wet end.
After replacing I have good flow, but a leak from the impeller housing. I put
an o-ring and a translucent shaped gasket on the wet end head, as I hope
it was supposed to go. I will take this off this weekend and reset things.
I may have just rushed the tightening of the head assembly and gaskets.

Some advice perhaps.

Would a bead of silicone be a good or bad idea?
How could a replacement gasket be found or improvised?

When I have it apart I will likely post pictures of the
pieces to get advice on how to properly seat the impeller head.

A Laing E10 Spa Circulating Pump 3/4" Barb is the current production
replacement, but the pump and head seem to be working fine.

 

[zea3]

You probably need to replace the shaft seal. Don't put any silicone on it. Anytime you take the pump apart you should replace the shaft seal.

 

[cootcraig]

You probably need to replace the shaft seal. Don't put any silicone on it. Anytime you take the pump apart you should replace the shaft seal.

I pulled the pump out again and with a better 3mm hex tool carefully seated the impeller housing.
Back on the spa and it leaks just the same. There is an outer gasket and I guess a shaft seal.
I have some pictures here

Any thoughts and fixing the leak?

The current production pump is about $150, and would require piping changes.

Maybe you can point out the shaft seal to replace in one of the pictures.
Where would I get replacements for the housing gasket and shaft seal?

 

[cootcraig]

Picture of gasket ring on circulation pump here.

Page with pump pictures here

Would it make sense to scrape off and replace the gasket on the pump body?

Where could I get a replacement gasket?