Gauge issues

[Escambia]

Rpm gauge reads all over the place. Today it read 1000 while idling and I know it was not at 1000. I tapped the glass on the gauge and needle started jumping around until it started reading close to being right. Fuel gauge same thing and it hasn't worked for a while, I thought it was maybe the sending unit, but when I tap it it moves around. Is this a sign of bad gauges?. They are Honda gauges on a 2001 sea chaser center console with 115 Yamaha. (If that matters)...any input is greatly appreciated

 

[Sea Rider]

If need to tap gauges on top glass,could be due to very little use, needle kind of stucks inside gauges, a sign that calls for new gauges soon..

Happy Boating

 

[Escambia]

They look like original gauges so I'm sure they probably just about need changing out.

 

[Scott Danforth]

clean the contacts (power, ground and signal) on the back of the gauge.

 

[Escambia]

Changed all battery connections at battery. Inspected wires behind tach guage. Turn the key on gauge moves up a little. Turn key off and gauge goes to around 900. Right under the 1000 mark. Bump the key and the gauge moves up every time I bump the key. Turn key off and gauge goes back to around 900? Have not tried it running yet.

 

[Escambia]

Also traced the wires from gauge to ignition. Everything looked alright except this round thing( no idea) on the back of the ignition, looks like it might have a little corrosion on it but don't know what it's called.....