PETROL GAUGE.....SENDER BLUES!!

[swetty]

hello all
does anyone have any idea why my patrol gauge is working not quite right??
Its on a 1968 camper.
Whats happening is.... when the fuel tank was completely empty, and i turned on the ignition the needle on the fuel gauge went up past the red mark and stopped at the white mark after that.
I put in a gallon of petrol [ignition still on] and the needle moved up a mark.
I drove the van so as i ran out of petrol and it stopped on the same mark [before i put the fuel in]
I have checked the sender unit[ its the tube type]..and the float is freely going up and down fully
when i turn it upside down the needle moves upwards. and when i turn it the right way...the needle goes to stop.on the first white mark after the red.
ive noticed there is a bit of rust around the gauge could it be this.
could it be a nakkered gauge or the sender.
any one else had this prob.
cheers
jon

 

[creationblue]

More than likely to be the sender I'de say, the guages are pretty sound, either they work or they dont. Earth faults cause probs with the set-up too, if you can ide replace the sender and go from there.

Just