I think this will get more views in the "engine" forum (you're in "audio").
If the engine runs with both idle set screws run all the way in, your PV is likely blown. HOWEVER, it sounds like maybe your boat kept running because the nose was high / floats are leaking.
It sounds like you really need to buy a rebuild kit to replace your needle and seats. I wouldn't pin it on the PV yet. If the boat keeps running while level and the screws run all the way in AND the jets not leaking, I would suspect the PV.