Reply To: Evinrude 4423, water pump

[Gary H.]

Looking at your pictures, I would have to say that that top plate looks like it was attached to the lower housing. I don’t know if those are rivets going through the lower housing that are removable and are replaceable or if it was cast studs that stuck up and once the plate was put over it, the studs were peed down like a rivet head to hold the plate down. Once the impeller is pushing against the plate and rotating, you do not want the plate to spin. If it were to spin in the housing, it would wear out in no time.  Just my thoughts about it.