Loose's ground when key is on

[poppie59]

I have

YTH20K46 (960450004-05) that when I turn the key on I loose the neg ground to the hour meter. Also motor won't shut off with the key in the off position, have neg charge to coil but is very weak. I have changed key switch and coil same results. I have cleaned the neg points on the frame. Also has new battery. A mouse had chewed the positive wire to fuel solenoid and I replaced that wire. Tractor does run.

 

[poppie59]

" when I turn the key on I loose the neg ground to the hour meter. "
How did you prove this ?

With a test light going from positive to the neg wire at the hour meter
also positive wire to hour meter is hot when key is off

" have neg charge to coil but is very weak. "
How did you measure this ?

also with test light the bulb is very dim at the coil kill tab . But very strong at the coil mounting posts
all spots have been cleaned with sandpaper nice and shining
thank you for the schematics as those are the same as mine.

 

[Richie F]

Sounds like feed back to me. That's my first though.
Test ground with ohm meter not a test light.
Your hour meter should not have power to it with the key off.

 

[Richie F]

Don't know how to resize it sorry.

 

[poppie59]

thank you again I have the schematics

 

[Richie F]

I posted it for you and others that may want to help out.

 

[poppie59]

Going to pull flywheel to check stators condition

 

[Richie F]

Going to pull flywheel to check stators condition

If the engine runs, look at the diagram.
It tells you the values of the stator disconnected from the voltage regulator.
28 volts AC @ 3600 RPM.
That will tell you if the stator is good or not.
When stator is connected to regulator you will have 9-16 amps DC @3600 rpm going to the battery.

 

[Fish]

I have

YTH20K46 (960450004-05) that when I turn the key on I loose the neg ground to the hour meter. Also motor won't shut off with the key in the off position, have neg charge to coil but is very weak. I have changed key switch and coil same results. I have cleaned the neg points on the frame. Also has new battery. A mouse had chewed the positive wire to fuel solenoid and I replaced that wire. Tractor does run.

What do you mean negative charge to the coil? Did the new solenoid match the old one?
Was the keyswitch you put on the correct one? The letters on the back must match, the same number of prongs don't mean that they are the same?

 

[Fish]

Also, re-look at the repair on the wiring to the fuel solenoid, generally wiring problems are where there was some repairing.