Opposed engines in normal climates..'.pulling through' is NOT recommended by either Lycoming or TCM Continental, and....
if either magneto is not properly grounded, there is a slim chance that the engine might attempt to start (especially if warm), so....I would avoid.
I own a TCM GTSIO-powered airplane, and I will not allow the propellor to be 'pulled through' by hand, as that is precisely what the installed electric starter is there for...
'Pulling throuth' by hand, must be a Brit thing...
where old outdated procedures die hard.
