Gas Gauge pinned on full

[geppert]

I have a 1992 SeaRay Bowrider 180 recently purchased used.

Outboard 150 hp Merc XR4 (oil injected) and internal gas tank.

All of a sudden, for reasons I can't explain, the dash mounted gas gauge is pinned on full. Actually it's past full all the way it can go and never comes down. It was working fine when I bought the boat 2 months ago. This even happens when the batteries are disconnected. I have tapped the face on the gauge but the needle doesn't budge. What are my next moves?? There seems to be A LOT of wires connected to it? Should I disconnect all the wiring to see if there might be a short somewhere? I am thinking maybe a short in the gas tank float circuit? Any suggestions?

 

[Pseudomind]

I have a 1992 SeaRay Bowrider 180 recently purchased used.

Outboard 150 hp Merc XR4 (oil injected) and internal gas tank.

All of a sudden, for reasons I can't explain, the dash mounted gas gauge is pinned on full. Actually it's past full all the way it can go and never comes down. It was working fine when I bought the boat 2 months ago. This even happens when the batteries are disconnected. I have tapped the face on the gauge but the needle doesn't budge. What are my next moves?? There seems to be A LOT of wires connected to it? Should I disconnect all the wiring to see if there might be a short somewhere? I am thinking maybe a short in the gas tank float circuit? Any suggestions?

As just something to try, and only a possibility, which I believe will not hurt, Buy some Chevron Techron and put in your tank. Give it some time to work, may take a few days even.

They sell it in bottles for treating 12 and 20 gallons, so you may need more then one bottle.

Either the the sending unit has gone non-op completely or if it is like some auto sending units the sulfur in the gas has affected your sensor, something akin to gumming it up.

:thumbsup:

 

[Chris Dauth]

He said the gauge is still hard over with the batteries disconnected ! The gauge is stuffed.

 

[Pseudomind]

Not necessarily "Stuffed."

:huh: