I'm finding them fairly easy to get the hang of, i have a number of briggs now, and to be honest, a new air filter & spark plug, a good carby & tank flush, and some fresh oil and fuel seems to be all for alot of them want.
Just servicing, not repairs as such.
i have Brigs engines from 73, 75, 77, 80, 81, 89, 98 & 03, so i am getting a reasonable cross section.