5horsebriggs on your questions
verticle shaft enge be changed to horizontal..
. is it hard?
yes you can change a v to a h
is it hard .... well ... you need to rework the oil slinger from the paddle wheel to a dipper
deal with how to put oil in it to a proper level
carb needs to be re worked to sit like it needs to be
how to mount the motor on its side is not fun to figure out .
the flywheel may or may not work if its a mower engine you most likely will need a tiller flywheel as mowers use the blade as part of the flywheel weight .
then the crank is way to big for most of the cheap clutches . its 1 inch or so , so you have to machine it down and fit a key or get the big bore $100 clutch , or do some jack shaft clutch setup .
http://www.oldminibikes.com/forum/briggs-stratton-engines/28719-another-vertical-horizontal-mod.html there is a thread on doing some of the mods . its lot of work to do but if ya really cant find a side shaft ya can make it work .
a lawn boy motor would be less work tho 2cycle and just the crank and carb need work . put a diaphragm carb on it and have the crank turned down keyed and make a mount .
:grind: