Great post from HS, as usual...
I think the biggest thing with engines is to keep them clean - frequent wipe-downs with an oily rag will help, getting onto any leaks in quick time will prevent a lot of corrosive events there - esp motor mounts which, when rusted, will be difficult or impossible to adjust when you most need to.
Now that you're at the 'clean' stage, it will be easier to keep it there than it was to get it back to that state.
btw our club will be at Snug on the 26th.. what boat are you on? Maybe we'll say Hey....
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)