that screw needs to undo and lift plastic piece off ,then you will see impellor give it a flick does it go round , behind that is a black rubber remove that then put on pump out when water goes out replace rubber and srew and cover job donetook all mesh bits out etc and there is a plastic piece with 1 screw in a hole about inch away from it and a few small white moulded plastic like large grooves in which some bits had gathered etc, i have removed the bits but should i undo the screw it and remove the whole plactic piece, or poke the hole at the side? i have not seen the proprellor bit that you describe?
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