i ask my self the same question "why, oh why?" all the time
3 main things are:
mowers
computers
pos 89' magna
the starter is an easy fix. i think ive posted on it before. ill have a look otherwise ill make you some simple instructions and see how it goes.
regards jay
p.s throttle control is do do with the tension of the spring between the butterfly linkage and the metal plate the cable actuates.