I have a 200L carb serial# OT630748 Merc outboard
I recently installed a temp gauge I threaded the sending unit in the threaded port
just under the #4 spark plug my factory overheat is still hooked up and is working like it always has
but the gauge is reading seems high from what I have read
At idle warmed up it reads 175 with 3 psi water pressure
at 3000 rpm its reading 185 with 7 psi water pressure
at full throttle its at 200 with 12 psi
Being this is head temperature and not water temperature is this to hot and do I have the
sending unit in the right place
Any help very much appreciated Thank you