Ignition switch that can be used well to replace original ignition switch of Japanese compact tractors are not equipped with automatic glow (glow plug preheating), but manual, operated from the ignition switch. This switch has 4 positions, OFF - IGNITION - GLOW - START. Wiring: pos. 1 (30) - positive from battery. Pos. 2 (15) - electricity for the instrument panel. Pos. 3. (19) - to glow. Pos. 4 (50a) - to starter motor. OEM Massey Ferguson 1874120M93, 1874535M3. Lucas 34228. Installation diameter 16 mm. The largest diameter is 53 mm.