So, for better or worse I now have the new B&S ready to install. It will require minor mods to make it fit, but nothing too wild or unmanageable: hack a little corner out of the bonnet to make room for the fuel tank, move & bend the steering linkage a bit to get around same tank, mod the forward/back foot paddle which currently scrapes the muffler.

However, there are more cables coming out of that motor than I have connections for and there are no instructions to tell me what's what. Furthermore I am not 100% on connecting the throttle cable although I reckon I've got it figured out.

I looked high and low for a workshop or installation manual but to no avail. The operator's manual is next to useless for this purpose. I'm sure I'll eventually work out what's what but I'd love my educated guesses to be backed up by some manufacturer's guidance.

Would anyone know where to find such documentation? B&S 11.5 Model 21R877

Thanks a lot, friends

Oli