This listing is for the End Cover / Plate 3851697 for Volvo Penta Raw Water Sea Pumps 3857794 and 3858847. If your pump won't prime it could be because of a grooved end plate causing a loss of suction. This is a like new resurfaced and sandblasted end plate. These cost about $65 new if you can find them.
I can also remanufacture your actual pump with a quick turnaround.
I can also remanufacture your actual pump with a quick turnaround.