QuestionI have an older Murray riding lawn mower, Model 45673x92A. It has an electronic ignition which was replaced about a year ago and I recently replaced the solenoid.
The problem that I've had is that whenever the key is in the off position, the mower continues to run. There is a black wire coming from the motor housing that is connected to a yellow wire via an inline connector and, in the past, I was able to disconnect that wire and the mower turn off. For some reason, that is no longer working.
I'm assuming that something is not grounded properly and thus it won't turn off. There are 3 safety shut-offs:
Seat Switch
PTO Switch (not really a PTO, but that's what the documentation calls it)
Clutch Brake Switch
At this point, only the PTO Switch and the Clutch Brake Switch are operational (i.e., if they are engaged, the mower won't start)
Also, the lights work as long as the mower is running.
At this point, I'd like to either figure out what's wrong, or install a toggle switch so I can turn it off.
I can scan the schematic, if you need that as well.
Any assistance you can provide would be greatly appreciated.
AnswerHello Tracy:
Ok. Where you Lose me is the You Unplug the Yellow Wire from the Black Wire and the Engine Quits. Used to. See the Problem is, the Ignition Module/Coil is Grounded to Shut Off the Engine. Usually I Would Suggest Replacing the Ignition Switch. Does this Engine have the Fuel Shut Off Solenoid in the Carburetor. There will be Wires Running to it at the Base of the Carburetor Bowl. If Yes, then the Carburetor Solenoid is Bad and the Ignition Switch Also. If there is No Solenoid, then Send Me the Electrical Schematic, Please. The Addy I Receive Pictures at is jbridger54@yahoo.com. Hope this Helps. I am Here if You Require More Assistance. Let Me Know What Happens, Please. Thanks.
Good Luck
Respectfully
John
Hello Again Tracey:
I Rcd your Schematic. Look at Post #3 on the Ignition Switch. It is a Grounding Wire for the Coil. Check this Wire for a Break Between the Ignition Switch and the Coil. There is No Current Required to Run a Small Lawn Mower Engine Unless it has the Fuel Shut Off Solenoid. The Engine will Run if it has Gas and the Armature/Coil/Ignition Module are Good. When you Ground One Side of the Armature/Coil/Ignition Module the Engine Stops Running because you Ground the Fire going to the Spark Plug (like Grounding the Tip of the Plug to the Block). When the Ignition Switch is in the Off Position this Yellow Wire(#3) Should be Grounded. If you Test the Wire and it Shows Ground in the Off Position, then the Wire to the Coil is Broken or has a Bad Connection Somewhere. I am Still Puzzled by the Engine Shutting Off when you Unplugged the Yellow to Black Connection. Something Had to Have Been Grounding the Coil when you Moved the Wire in Order for the Engine to Shut Off. Check the Wire for Bare or Burn Places. You will need to Remove the Blower Housing (metal engine cover) to have Access to the Armature/Coil/Ignition Module. On Most Rider Mowers the Lights are Supposed to Operate Only when the Engine is Running. This Prevents the Lights from Draining the Battery if they are Accidently Left On. The Battery was Supposed to be Disconnected Before Removal of the Solenoid. The Battery Wire to the Solenoid has Current All the Time. This is Correct. I Don't Think the Battery Ground is the Problem, Since the Engine is Starting Good. Hope this Helps. I am Here if You Require More Assistance. Let Me Know What Happens, Please. Thanks.
Good Luck
Respectfully
John
