Posted: May-06-2008 04:22AM

You'll have to provide more information.

The gauge type changed in late 1964.  Mk1s before that time used a magnetic type gauge and sender.  From late 1964 on, the gauge system included the voltage stabilizer and the gauges were based on bimetallic strips.  The components of the two gauge systems are not interchangeable.

The Cooper-S sender was not different from that used on standard Minis.  The early senders bolt onto the LH tank.  They had a resistance range of 0 Ohms = empty to 90 Ohms = full.  The later senders mount with a bayonet ring and they operate between 240 Ohms = empty to 30 Ohms = full.

The 90-0 Ohm sender was not unique to Minis.  Various other cars (particularly General Motors) used similar senders so you may find a gauge that will work with that (assuming your car is early).  A LOT of late model instruments will work with the 240-30 Ohm sender but the response will not likely be linear (i.e. Half a tank displayed on the gauge won't likely be half a tank).

The important thing to note is that the early and later senders not only have very different resistance ranges... the resistance changes in different directions.  That's why components of the two gauge systems cannot be interchanged.

Post more information on what you're trying to accomplish and what you have and we'll see what we can do to help.

Doug L.