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with my fuel gauge on my 17' aquasport, when i crank the boat, the needle just jumps back and forth and never gives an accurate reading. is it the wiring or the reader in the tank?
well its different every time, some times it reads full and then it reads empty when i have just filled up and most of the time it just flicks from side to side, even when the boat is out of the water.
check the wires at the sender clean and tighten,
if that is not it next check gauge do the same stuff, pos and neg, if not that it is between the two check harness.
you have an intermittent connection
rob
Sounds like a bad ground or bad sending unit.You can test the gauge this way: keep 12 volt power hooked up. touch the sending wire tab to the ground. The gauge should move if it is good. Check all other wires at gauge and tank. If that doesn't work you will need to replace the sending unit. By a universal unit and measure tank depth. Typically the sending unit will need to be sized to half the depth of the tank. 12 inch tank 6 inch float height. Its actually pretty easy to do. good luck
Mine jumps around alot when im moving but never to empty. it only jumps the amount of gas I used maybe more. I always get nervious so i just fill up everytime I go to the lake .
if it moves up and down you do have power to the gauge, turn on power have someone watch the gauge while you wiggle the sender wire, infact remove the sender wire, ground it, the needle should peg right over. if it does not check the gauge. If that does peg the gauge and you still have the bouncing needle issue the it would be the sender.
rob
