757-26381 oil pressure switch, used on the LPA, LPW/S Lister Petter engines. RD-150 201-80170 Cylinder joint used on

201-80170 Cylinder joint used on the ST line of engine only

This is not the expansion plug set for the LPW/S engine

This engine was a Kohler -18 air  cooled twin cylinder

The Chinese knockoff fans have a tendency to loosen up and fly apart

757-26381 oil pressure switch, used on the LPA, LPW/S Lister Petter engines. RD-150 201-80170 Cylinder joint used on757 26381 Oil pressure switch, used on constant speed engines, both LPA and the LPWA S series engines. Part number 750 14870 is the same switch. This switch has 3 terminals. This switch is associated with accessory code JN. This will be item number 1 in the Lister Petter drawing.