I am having the exact same issue. I can’t get my star gear to disengage even manually with my fingers. The gear seems to be stuck in the up position. Any fix ideas
Not sure you have the same problem
Your problem is the starter pinion or the bendix is worn so the teeth end up being point to point
Your solution which has nothing to do with a starter that will not turn off is either replace the pinion & activating mechanism or the entire starter .
I'm currently dealing with a starter/starter solenoid issue with my dad's lawn mower. It is a 13hp John Deere LT133 with a Kohler engine. Nearly every time I start the mower, the starter stays engaged even when I turn the key to the off position. Even if the engine starts, it stays engaged. It does not make any grinding noises or anything, but the solenoid stays engaged so that the gear moves up and contacts the flywheel. You can also hear the starter motor whirring as it normally would. The only way I can get it to disengage and shut off is to release the clutch. Also, if the engine starts and I turn the key off, the engine will shut off, but the starter will still be going. It obviously stops if I disconnect the battery also. Am I just dealing with a wiring issue? Is there a switch on the clutch that is connected to the ignition switch somehow or is it all mechanical? I just removed the entire wiring assembly for inspection and the ignition switch looks horrible. I'm going to clean the contacts and maybe even try to disassemble the switch to clean the internal contacts as well. Any suggestions in the meantime?
Your fist problem is you have not bought the excellent JD technical manual or by now you would have solved the problem
According to the generic wiring diagram for a LT133 you should have an external starting solenoid with a purple wire & black at the base
The purple wire goes battery voltage when the key switch is in the start position
The black wire goes from open circuit to ground when the PTO switch is in the off position
So your first test is to check that these wires do that provided the rest of the mower is in the correct settings for starting
If this is the case then the solenoid is faulty and requires replacing / repairing.
Now the starting solenoid purple wire is controlled by the key switch alone so the next test is to remove the key switch and check for continuity between the purple wire terminal and the red ( battery power ) wire terminal
There should be none except when the key is in the start position
If this is not the case then the switch is faulty and needs replacing
IF the switch tests OK then do a voltage test on the purple wire when the switch is not plugged in
There should be no voltage
If there is then there is a short circuit or an incorrect connection.
The black wire should show ground only when the PTO switch is in the off position and be open circuit when the PTO switch is in the on position so you can not crank the engine with the blades engaged standing next to the mower with your toes under the deck .