Home / Avionics / Instruments & Gauges / Fuel & Water Temp Gauge, Compasses / Swift, Water Temp., 2-1/4 Swift, Water Temp., 2-1/4$59.75 Swift, Water Temp., 2-1/4 quantity Add to cart SKU: INWT125 Category: Fuel & Water Temp Gauge, Compasses Description Description Includes cylinder head mounted probe (1/8″ NPT). Requires 12 VDC power, must have battery or 12 VDC power supply. See INEL100 low power adaptor 12 VDC in this section or use regulator / rectifier designed for use without battery.