Go Bottomstarting problem
 | gator3
Join Date: Aug 2009 Posts: 4 Southeast 
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2010-08-24 173428
I have a MF 1240 that will not start with the key. I have no power going to starter solenoid. If I put the key in the run position and run a jumper wire from positive battery to starter solenoid it will start and run great. It shuts off with the key but will not start with key. Any body had this problem? Many thanks in advance.
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Add Photostarting problem
 | yooperpete
Join Date: Jan 2004 Posts: 1413 Northern Michigan 
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2010-08-25 173432
You more than likely have a safety switch interlock issue. Frequently, my rear PTO lever vibrates slightly out of its "Off" position notch. I would check this out first. Likewise, make sure your clutch pedal is all the way down, hitting bottom. These two conditions would mean your safety switch tripping points may be at the very extreme, requiring very little variation for them not to function.
If an electical connection is not good somewhere in the system, you could be getting "no power" or a voltage drop from the key to the solenoid. If you use a tester with the key in start position, check if are you getting current to the solenoid. If you are only getting 8-10 volts the solenoid may not trip. If you are not getting current, trace it back to all of the interlocks where one of the switches are not making contact. It is either not functioning or out of adjustment. ....
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| gator3
Join Date: Aug 2009 Posts: 4 Southeast
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2010-08-25 173433
Thanks yooperpete I will take a look. You wouldn't happen to have a wiring diagram for this model or know where I could download one? ....
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| yooperpete
Join Date: Jan 2004 Posts: 1413 Northern Michigan
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2010-08-25 173436
Sorry, but I can't help you with that. ....
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada 
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2010-08-25 173437
Sounds like the key switch itself is bad, bu before you replace it check that there isn't a fuse out or other simple wiring issue like some corrosion or a bad solder / crimp joint.
Best of luck. ....
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Add Photostarting problem
| gator3
Join Date: Aug 2009 Posts: 4 Southeast
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2010-08-25 173442
Murf I checked all fuses=good. Pulled dash and all the connections on the key are operating in all positions. With key in start position have power at key but not at wire end for soleniod. Checked for power going backwards at the next connetion and still no power. So I will keep backtracking until I find the problem. Thanks. ....
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Add Photostarting problem
 | kthompson
Join Date: Oct 2005 Posts: 5275 South Carolina
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2010-08-25 173446
I have no idea what safety switches your tractor may have but hold the key to the start postion with all levers and pedals in the position they are suppose to be due to safety switches for the starter to work. Then take each lever one at the time and move it very slowly and see if it happens to be just slightly out of adjustment preventing the circuit from being closed. ....
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