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I assume you mean # ***** , the impeller? You want the impeller off the crankshaft. Bolt is all that holds it, it will be tight from rust and corrosion. Take the bolt, less the washer and retainer, and reinstall it in the crankshaft ,then hold a strain on the impeller and tap on the bolt , to see if it will loosen the impeller.
Heat applied to the impeller will also help loosen it, do you have a torch to heat the impeller?