Fuel guage bouncing?

My gauge has always bounced in my '93 Ski.

However earlier this year my dads pontoon boat had fuel gauge issues. He was told its always the sender. Well it wasn't, turned out to be the gauge. In my measuring attempts to track down the problem, I witnessed the OHMs reading from the sender changing very rapidly when the float was moved up and down. That being said, I believe any damping is being done by the gauge and not the sender. This was also observed when power was removed from the gauge, it didn't slam down to empty, but slowly moved that direction. My dads gauge is a Teleflex gauge too.

In my Nautique, I just know I'm low when the needle stops bouncing on empty and hope I'm not too far from home :-)

Steve,
Gauges have dampening to prevent rapid needle movement due to rapid changes in sender resistance. In this case, the gas level changing from turning the boat, etc. I would say your problem is not mechanical but electrical. Check all the connections on the gauge circuit. Don't forget to check the connectors in the wiring harness. Make sure you have a good ground to the tank and a good steady nominal 12 volts to the gauge itself. You need to get the meter out.