This listing is for the End Cover Plate for certain newer Volvo Penta Crank Mount raw water pumps.
Fits: Volvo Penta 22367259 21611833 22031241 End Plate Cover For Raw Water Sea Pump
If your pump won't prime it could be because of a grooved end plate causing a loss of suction. This is a brand new stainless steel plate and is thicker than the OEM plate.