Hi, I have a Toyota Landcruiser which uses 30 litres of LPG to the 100 k's so I am building a remote electric clutch for the existing fan. I am useing an old Ford air con compressor clutch which I believe will handle the torque as these compressors use about 3 to 5 hp and start under full load. My fan although spinning free on 6003 2rs bearings will probably be spinning anyway when engaged as the air flowing past it will most likely turn it. The electric clutch pulls 2 amps and is designed to cycle often. Modern cars disengage this clutch at certain speeds automatically. Steve