My tardiness in replacing the fresh water pump of the cooling system - weeping hole dripping with antifreeze - resulted in a 1/4 of a cup of antifreeze in the bilge.
I purchased a new one for about $ 400.00 that included the gasket.
Removing it was not problem. Then I had to carefully scrape off the residue gasket.
To reinstall the new gasket is recommended to be dampened then install the new pump.
I used a syringe to refill the lost antifreeze - about 10 oz.
I started the engine expecting to see high temperature, which means air in the system requiring burping. But burping was not needed and temperature stabilized at normal 162 F.

More content found here https://www.catalina36.org/forum/technical-discussion/best-procedure-coolant-flush-and-replace

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