^You got a pic? As said 182's dont have external filters, yea the pump is inside the tank. Filter (IF FITTED) is on the right hand side of the tank.
Maybe the Aus spec ones have them?
you don't have to, plus its only available as part of the sender unit which is about £300 IIRC
Edit - £208.17+vat
Sorry to bump this thread
But is this the same on a ph2 172