[rotorwrench]

It needs the cover over the screen to be secure and that butterfly wing plate P/N B-6631 to help control oil flow and pick up. The spring on the bottom that holds the pump may have some fatigue but as long as the pump is working it should be OK. Wear on the gears, gear plate, or body can lower the pressure.

These old engines don't need a lot of oil pressure since it's mostly just feeding oil for gravity flow unless this engine has been modified but it's nice to know that there is some flow going on. B engines had pressure on mains but they had better bearings too. When they are worn they will talk to you.