compared to some others this is pretty light subject - but...I have waved some high pressure air past the pick up tube on my speedometer and visually saw the speedometer needle respond....why wont the speedometer respond to the water pressure when I am in the water?? its a pretty simple operation...I have made sure the tube is clear and it appears the speedometer is functioning - what else can I do?? has anyone else had a speedo problem and whats the fix?? is that plastic piece anythng more than a holder for the pick up tube?? I made sure that was clear as well and still the speedo doesnt work!! would like to know how fast I am going......
