Does anybody happen to know the thread size for the petcock valve in the thermostat housing on the universal M-18 or M-25 engine (they are the same)?
I want to order a real ball valve for this to make "burping" the cooling system easier. I'm guessing it is 1/4 or 3/8 but am not near the boat.
Thanks in advance for any help.
I want to order a real ball valve for this to make "burping" the cooling system easier. I'm guessing it is 1/4 or 3/8 but am not near the boat.
Thanks in advance for any help.