1990 90 HP Temperature sender thread size

[_brad_]

Hey all,

I'm away from home right now, but was wondering if anyone knew the temperature sender size for a 1990 90 HP VRP Evinrude.

I bought the gauge but need to know the sender unit thread size... Also the location would be nice too.. I know its either 3/8 or 1/2...

Any help would be greatly appreciated.

Thanks!
Brad