$19.50 Inc GST
Part Number: GPS133
Fits every A series engine from 1959-1996 (except twin point injection minis) as they have a different switch GPS135 and also have a transducer for oil temperature (YCB100320).
These original type oil switches came on when oil pressure dropped below 7-10lbs but if you require earlier warning than that then use HPS1 which activates at about 22lb or HPS3 which is adjustable from 15-605lb.