On August 21, 2018 at 11:41, highfigh said...
The switch should be wired so the nav light goes on in one position and the anchor light in the other.
What make/model of boat?
1995ish Invader is the model. It's a 20' offshore fishing boat. Yam 4 stroke about 10 years old. Runs great, slight hesitation if run max for 5 mins or so. Could stand a tune up and oil change.