I was working on an old B6100 for a guy and was looking at the pump. It had "GPO 7.9" cast into it. I came home and looked at one on a parts engine I have and it had "GPO 3.7" stamped into it. What does GPO mean? I know what GPM means on pumps but had no clue what this meant. I assume it must be some type of flow rating but I was curious what it actually meant.
Thanks!
Thanks!