Anyone have any idea why omc paints the stainless water pump plate in the rebuild kit? seems this paint since it wears off anyway stands a good chance of obstructing flow through thermostat compartment.1995 70 hp evinrude. Also noticed when removed original pump that its plate was painted when installed at factory as I could see where it had wore off during operation.was wondering if paint on impeller side should be removed before installing.Older kits I've installed weren't painted.