Do not replace Rochester fuel quantity transmitters with the Stewart Warner transmitters. The electrical function is not compatible. Stewart Warner transmitters must be used to replace Stewart Warner transmitters only. Replacing Rochester transmitters with Stewart Warner transmitters will result in erroneous fuel quantity indications.

Some Cessna and Piper aircraft have been modified with a Service Kit to use the Rochester fuel quantity indicating system. This modification required changing the fuel quantity gauge, transmitter, and other electrical components. Do not use the McFarlane (Stewart Warner) transmitters as a replacement for these aircraft.

Rochester Transmitter:

Early Style Stewart Warner Transmitter: