360 oiling problem under load

Dartish said
If debris in relief valve, wouldnt it cause peessure drop hot or cold and even in neatral when revved up?

Uh huh. :D

Maybe not hot or cold, but for sure in neutral.

Everything I'm reading is telling me it's a cavitation issue with the pump (like it's sucking air), but you would think it would also do the same in neutral.