Dave the Farmer 0 #1 Posted June 7 I have a Toro Wheel Horse Model 73429 Serial #8901097, 314–8 Garden Tractor . I was mowing for 4 hours yesterday, and when I turned off the ignition, the engine stopped but the starter motor continued to hum and would not disengage until I finally disconnected the battery. What can I do to solve this problem. Share this post Link to post Share on other sites
Sparky-(Admin) 21,352 #2 Posted June 7 That sounds like a bum ignition switch or the solenoid has “stuck” closed. If you reconnect the battery does the starter engage? Share this post Link to post Share on other sites
Dave the Farmer 0 #3 Posted June 7 Thanks Sparky! When I reconnected the battery, the tractor attempted to start so I disconnected it again. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,072 #4 Posted June 7 Sure it is not a model 73448? Share this post Link to post Share on other sites
Dave the Farmer 0 #5 Posted June 7 The Model # is actually 73428, Serial #8901097. Sorry for the confusion. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,072 #6 Posted June 7 57 minutes ago, Dave the Farmer said: The Model # is actually 73428, Serial #8901097. Sorry for the confusion. So it is a 312-8 model Share this post Link to post Share on other sites
Dave the Farmer 0 #7 Posted June 7 Thanks for the wiring diagram. Share this post Link to post Share on other sites
953 nut 55,394 #8 Posted June 8 8 hours ago, Sparky said: sounds like a bum ignition switch Bad interlock relay or ignition switch, relays seldom go bad so it is probably the ignition switch keeping the interlock relay and kill relay energized. Share this post Link to post Share on other sites
rwmastel 47 #9 Posted June 8 @gwest_ca Doesn't his serial number mean it's a 1989 model year? You keep posting newer 1998 documentation. Share this post Link to post Share on other sites
953 nut 55,394 #10 Posted June 8 6 hours ago, rwmastel said: @gwest_ca Doesn't his serial number mean it's a 1989 model year? You keep posting newer 1998 documentation. 1998 312-8 Early model73428 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,072 #11 Posted June 8 With this type of serial number you reverse the first two digits to get the model year. Up to and including 1989 the hood decals had a maroon background. In 1990 on the hood decals had a black background. 1 Share this post Link to post Share on other sites