Should be some pictures above. I wondering what the plastic valve piece is in front of the gear shift. Their was a tube attached to it that lead up and out of the lower unit a few feet long that connected with air. The hose is plugged, I just bought the boat, and im going through it. Is this some kind of air hose for the lower unit. Im thinking its the speedometer. Thx guys, I prob figured it out as im talking to you.