Looking for a source for a 12mm x 1.5 switch that is normally open and closes (to ground) at 225 t0 240 degrees. This would be used to turn on an in dash high coolant temp light.
I have found several sources for warning light kits to do this but they are all npt threads that require an adapter to use in my passenger cylinder head port.
I would prefer to have a switch that threads directly into the cylinder head. One wire or 2 wire would both work.