Fuel Gauge/Speedo Not Working- 2001 Super Air

[brock.higdon]

I have been slowly fixing the issues with my new to me last year boat. This is next on the to-do list. Can anybody give me some pointers on where to start? Fuel gauge is more urgent, but I would like to get both going.

[Treybizttu]

What does your fuel gauge read? When I reinstalled mine after the rebuild it was stuck at 1/2 tank but I pulled it again and worked the float around a bit... Been working fine since.


My tach is dead, hour meter does what it wants, and they all fog up... But i'll start another thread for all of that nonsense.

[brock.higdon]

What does your fuel gauge read? When I reinstalled mine after the rebuild it was stuck at 1/2 tank but I pulled it again and worked the float around a bit... Been working fine since.


My tach is dead, hour meter does what it wants, and they all fog up... But i'll start another thread for all of that nonsense.

On empty. Never moves. The backlight does light up. Same as MPH-stays on 0. Never moves.

[DW SD]

On the fuel gauge, disconnect the red wire at the 7 o'clock position on the back of the gauge - I believe that is the sensor wire, but double check it isn't switched 12V+ from the ignition - I think it is not as the 12V+ switched is daisy chained across many of the gauges. . Each gauge should have 12V+ (ignition switched - Purple), ground (Black), light (Blue) and the sender wire. Gauge measures resistance at the float sensor in the tank which varies as float sweeps. Ground that sensor input tab on the gauge and see if you get movement (with ignition on). If you have a potentiometer, you could connect one side to ground and the other side to the gauge and also see if you can get movement from the gauge when you change resistance. If you get movement at the gauge, I'd focus on the sender. You should check for continuity between the gauge and sender, if the gauge passes test (continuity = zero resistance when measuring both ends of the sender wire with an ohmmeter.)

If your boat has had some hacks work on it, check that the wires are in place. Tach feed from distributor is grey wire. It also should have 12V+ switched, ground, light connections. I think if the tach is working, you should see a flutter at ignition on. Check, too, for 12V+ at the gauge.

I attached a photo that should help you. The fuel gauge is to the left of the left speedometer when looking from the back (sorry photo should be flipped, too, imagine looking at the cluster from the back, but right-side up and you'll have the correct orientation). Took this a few weeks ago when I installed new speed cruise control.