6.5 HP Briggs & Stratton Low Oil Circuit?

I have a 3500 Watt Pro Classic standby generator. It has an Intek pro 206 engine and I could not start it. After a lot of investigation I traced the fault to the metal cased module attached to the side of the rewind housing. The unit has two wires attached, a grey one leading to the low oil plug/switch and a white one leading to the On/Off swith. The number painted on the module is 698451 4003. When I disconnected the module from the metal housing the engine started immediately implying that the module is shorting to earth. What does the module do and is it possible to buy a replacement?