"Two meter troll" wrote

Roger, why not double the filters and install a two position Y valve
them so you can shut off the clogged filter and run through a new
instead of trying to change out while running?

Did you read the post? The boat will run on the Shelco filter and polishing
pump until that filter loads up which will take a lot, lot, longer than a
second Racor to become non-functional.

Or, do you mean having 4 filters?

--
Roger Long