Replace Battery Isolator and Emergency Start Solenoid

[AllanS]

I am reviewing the DC electrical systems on my 32 year-old boat, and am wondering whether an upgrade to a new battery isolator and emergency start solenoid should be in order. See photo.

I have no direct evidence that they are faulty, I just don’t want to find out at a bad time that I need them, and they don’t work. Plus, I know there are better FET-based isolators that are better quality.