Take a look. Any corrosion = goodbye. And 2 years otherwise. I'd do the plugs each year. And the wires every 5 years unless they fail earlier.
Check them now, but do them in the spring.
Agree with the part to look for corrosion. Changed mine on the Rinker for the first time about 3 years ago (21 year old now) and have had the boat since new. Did it just because, was experiencing no issues before or after
