Engine Ignition Coil Kit 166 0820 Replacement for Onan Points Models BF B43 B48 NHC CCK Item Type: Ignition Coil KitMaterial: ABS, Alloy Primary Resistance: 3.12Ω Primary Inductance: 6.67mH Secondary Resistance: 20.5KΩ Secondary Inductance: 41.30H Primary Resistance: 4.25Ω Primary Inductance: 9.48mH Secondary Resistance: 37.85KΩ Secondary Inductance: 59.96HReplaceable OEM: 541 0522, 166 0820, HE166 0761, HE541 0522 Fitment: For Onan Points Models BF B43 B48 NHC CCKFor P218G engine Serial numbers 420,001 to 999,000 and Serial numbers 10,001 to 120,000 For Onan P218G engine in the tractor. No serial number range is affected, you must check your engine model. If you have engine for Kohler in your 317, this coil will not work. For P218G engine Serial numbers 420,001 to 999,000 and Serial numbers 10,001 to 120,000 For P220G engine Serial numbers 420,001 and above