They are terrible pumps. When I worked for a distributor they talked us into selling them for a while. We sold a lot because they were about $100 cheaper than the General T1011, and there were many, many problems, water leaking into the oil, or all the oil leaking out suddenly and the pump throwing a rod, and the ones that did manage to survive and last a couple years came in for repair in such bad shape that the cost to repair was more than the pump.