Redoing my hydrostatic fuel gauge with new red liquid

[Karl]

Thanks Jim -Once the hydrostatic gauges are set up they are pretty reliable.
I had a lot of trouble with mine and finally worked out that previous owners had tried to fix it by installing calibrating rods I removed 6 from my gauge . The other thing I believe is relevant is that if you install a new tank you have to use an adapter to use the original hydrostatic sender . This adapter raises the sender by at least quarter of an inch. I believe that this raise means that a full tank will only register as a little over 3/4 full on a perfectly functioning gauge - Installing calibrating rods will fix this but then the gauge will never be accurate other than when the tank is full. My solution was to cut out the gauge mounting area off an old tank and weld it into a new tank- Works great -once I fixed the issue of the POR 15 tank sealer I used flaking off through the fuel system -Karl