I found this on one of the mounting holes under my old diesel tank
It is about 1/4" thick. The blue coloured material is very hard, just about solid.
What should the tank be mounted on? Some filler-like material that goes hard, or some rubber material to damp vibrations?
Advice appreciated,
There is arubber vibration pad under each screw hole of the tank . im not sure of the thickness but 1/4 inch sounds about right, has to be thick enough to cushion vibration. Gerry