"it's simply a matter of finding the electric shut down solenoid..."

Sure, probably a good thing to think about before hand... if you know the system even has one. I recall being on a Hunter back in the mid 2000's some time that a friend had just acquired... and neither he nor anyone else aboard had any idea there was a need to have power to shut down the engine.

This was at the start of a race (yes, with a Hunter) and when my friend went to shut down the engine... it simply failed to do so. We ultimately stuffed a large cushion into the air inlet on this huge diesel to shut it down (very large cushion). Later investigation lead to a discovery that a relay had failed, and thus the solenoid never engaged.

I was at the time astounded that the old manual cable system I was most familiar with, had now been replaced by two components that could fail, vice one simple cable... three components actually, if one also considered the pushbutton at the engine console.

I note here that this trend toward "automation" seems to also be a trend toward increasing complication and lower MTBF... which just doesn't seem to be a good thing.