atomic 4 cooling water pumps

Atomic 4 Cooling Water Pumps Atomic 4 marine engines used several cooling water pumps over the years, but the most common pump was the Oberdorfer N202M series. This simple pump series has been continuously upgraded by Oberdorfer over the years of production. Other manufacturers are now making a similar pump. Some of the earlier Atomic 4’s used a Jabsco 17120 pump.