schlackoff, we are waiting for you to tell just what kind of "plugs" the
diesel engine on a commercial fishing boat has that might be cleaned by the
nervous crew the night before departing.

Anything from electrical plugs to hair plugs.

hair plugs? why would a fishing crew worry about hair plugs?

electrical plugs? on a diesel engine?

The point is that you
made a reading mistake by putting spark in front of plugs when it wasn't
there.

I made no mistake. I only pointed out a mistake made by the author and editors
of the book.

It's actually quite common for people to do things like that,
i.e, fill in a familiar missing word subconsciously. It's what you did
and you just can't admit you made a mistake.

Shall we hold our collective breath for your help in filling this gap in our
understanding?

Yes, hold your breath.

Steve