O-320(except H & rear carb), O-360, O-470, IO-470
O-520, IO-520, TIO-520, O-540, IO-550, TIO-550
300 watts or less / Thermostatically Controlled
110/120 volts (models 441 and 540 are available in 220 volts)
Installation Tips: On the O-320 (except H & Rear Carb) & the O-360- Sitting in the pilot's seat, the heater normally mounts on the right side of the oil sump with the thermostat facing the propeller.
3 to 5 hours on cold soaked engine, although, since unit is thermostatically controlled, it may be left on overnight, or all the time. Cowl covers and prop covers are recommended for extreme cold weather, They also reduce preheat time.
3 3/4 x 5