Question about Garden
The mower will start up with no one in the seat
"Fuse blows every time I start the blades." This is a problem involving power from the battery which finds a shortcut to ground.
For a machine specific diagnosis we need some or all of the following:
With an electric clutch power (12 volts) flows:
If the engine starts and runs fine until you activate the PTO, this shows us the rest of the wiring, prior to the PTO, is fine. Your problem can only occur after the PTO Switch.
Starting with a fresh fuse, sit in the seat and turn the key, one click from off to run, you will hear a faint click. That faint click is the fuel shut off valve under the carburetor. It is turning on and off when you cycle the key from off to run. Do not confuse this click with the Clutch click.
Leave the Key in the Run position, cycle your PTO Switch on and off. You will hear a click. This click will be twice as loud as the fuel switch click. This louder click is the Clutch engaging. If you do not hear this click, the PTO switch may be bad or the Clutch may be bad. This is assuming your battery is good and fully charged and that your Key Switch is functioning correctly.
On the other hand, if you perform this test and do not hear a click AND it blows another fuse, you have just confirmed the bad wiring/bad clutch scenario.
PTO Clutch will Not engage or stay engaged.
There is a very fine discussion on evaluating electric clutches at this site:
My JD tech manual, which covers the entire LA 100 series, agrees with the electrical specifications. It states that the Electric PTO Clutch should show the following:
A short cut test would be to disconnect the clutch harness nearest to the clutch. With a fresh fuse, run the PTO switch test again. If it shorts and blows the fuse, your problem is with the wire, likely not the clutch. If the fuse does not blow, your problem is likely with the clutch.
On a final Note: On all John Deere 100 series and other machines, you can and should be able to start the mower without being in the seat.
Fixing Electric Clutches
Posted on Apr 18, 2015
For starting with one one the seat either one safety switches has failed or have been bypassed.
For the blowing fuse problem if it has electric PTO test it for shorted condition. Most usually PTO coils have a resistance of 1.75 ohms. anything under 1.5 ohms is a severe shorted PTO coil. If it is a manual engaged PTO then either you have a wiring shorting ground or someone have mis-wired the safety switches.
Posted on Apr 18, 2015
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Posted on Jan 02, 2017
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