Case Ingersoll C30530, C30480, C30135, C30529 OEM Ignition Key Switch. 
 
5 terminal ignition switch, for battery ignition external coil systems. All Onan Performer Engine powered 3000, 4000, 4100, 3100, 6000 series machines. As well as LATE model 200 and 400 sereis WITH PLASTIC DASH cover.  Has 5 spades on back of switch, often has a 5 spade plug it mates too. 
 
Fits many newer (Kohler K series and Onan engines) models that have a SEPARATE headlight switch NOT for Magnum or Vanguard powered models, use C30267 for those models
 
We Highly recommend replacing/adding a new inline fuse kit when replacing your key switch.  Inline fuse kit option is available at check out.  Also available and highly recommended is adding Relay Upgrade kit, description for kit is linked HERE and option to add is available at check out
 
OPTION- To Add The key switch plug connector and terminal kit for the back of the key switch. 
OPTION - To add Key Switch Plu with Pigtails Kit