I have a 1990 John Deer 212 riding mower. To get it to start 90% of the time, I have to put it in neutral and jiggle the shifter until it starts. 10% of the time it will start normally. Any help to corret this problem will be gratefully appreciated! Thank You!
Dale

Transmission safety switch. Jiggle gives it away.

Got to laugh, KISS is a man of few words but is totally correct.