https://uscgboating.org/recreational-boaters/engine-cut-off-switch-faq.php
From what I read and understand, if your boat was built before Jan 1, 2020, you don’t need one.
If you’re boat was built after that date and is under 26’ it needs one. If your boat was built with one, you need to use it.
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So I just skimmed further down the FAQ list I posted. Q23, the last one,
Q23. I bought my 22-foot boat many years ago and it did not have an engine cut-off device installed by the manufacturer, so last year I added a new wireless engine cut-off devices. Am I required to use it?
A23. Yes. If an engine cut-off switch is present, it must be used.
Apparently, if one is installed on your boat, no matter the age, it must be used. So for those of you who did install one, it must be used.
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