My son has bought some aftermarket digital gauges for the 1991 Mayfair he is restoring
There was no problem with the oil pressure gauge as it was a 1/8 NPT thread
His problem is the water temp with it been a 5/8 hole and his sensor is a 1/8 npt, he wants to keep his original gauge as well
He has been looking at one of the adaptors that fit in your water pipe, the top hose that would be ideal is too short to fit one in, so which other pipe would be suitable, would one of the heater pipes be ok ?
Look forward to some advice
Thanks