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My John Deere 180 won't start. Has power, but not turning over. I replaced the battery, the starter is only two years old, spark plug seems fine. Any idea on what else could be causing it to not start?

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There are two fuses, a circuit breaker, and safety relay. This unit requires brake ON (transmission neutral) and PTO OFF to engergize the safety relay and allow engine crank/run. I don't believe it needs operator in seat. Cycle the PTO switch and brake and try to start.

If you turn the ignition switch to the run position and turn the PTO on the off you should here the clutch engage/disengage. If not then check fuses and PTO switch.

I did not find a free schematic download for the 180/185 so can't get into to much detail.

When you turn the ignition switch from off to the run position the safety relay should energize, which you should be able to hear. If the safety relay is not energized it will not crank/run.

Posted on May 16, 2019

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180 manual:

Posted on May 16, 2019

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Check fuses and safety switches

Posted on May 16, 2019

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Posted on Jan 02, 2017

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SOURCE: I have a John deere 317 tractor that does not start.

We will be testing for voltage to the points, coil, engine to tractor wiring harness, ignition switch

Tools needed:
volt meter to read 12 volts, or test light

1) with the points open: is there voltage at the connection wire at the points
If yes; adjust points to .020" and try to crank engine and check for spark
*** you may want to determine if condensor is connected to this wire also
if no
2) check point side (neg or - ) of coil for voltage
if yes, engine should start
if no
3) check for voltage at the + side of coil
If yes, coil is bad
if no
4) check wire connector from engine to frame wiring harness
if yes; engine should start

if no
5) check wiring on the back of ignition switch
if yes; engine should start

if no
6) check that ignition switch RED or BATTERY supply wire has voltage
if yes; switch is bad

if no
7) check supply wire and circuit breaker connected to the battery side of the solenoid
if yes; engine should start

if no; circuit breaker could be at fault or wire connector at battery supply

I’m happy to assist further over the phone at

Posted on Nov 08, 2009

  • 197 Answers

SOURCE: John Deere 425 AWS no start, no nothing???

If engine cranks over and have no spark try a time delay module located under thermostat housing.

Posted on Nov 13, 2009

  • 1 Answer

SOURCE: john deere 425 lawn tractor. it wont start but it

My John Deere did the same thing. Turned out to be the emergency brake sensor.

Posted on Jan 21, 2010

  • 13 Answers

SOURCE: john deere lane rider la135 wont start.

You don't mention if they are on and are bright or are week. Do they dim when trying to cranks the motor? I would start with checking the ground wire at the battery and where it connects to the frame. Make sure both are clean. From there, have the battery tested and then the starter.

Posted on Jun 10, 2010

  • 10 Answers

SOURCE: Have John Deere 165 riding mower. Strong crank,

Has it been outside? May be water in the fuel.

Posted on Jul 25, 2010

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Check the easiest things first: Ignition Wire and plug. If they any ignition components look questionable replace them. You can test a wire without taking it off with an old inductive timing light. Visually check both wire and plug in the dark. If you see light from either replace the offender. Skip cheap plug wires, they are worthless. If no spark then check for voltage across low side or primary of coil. If ignition is good, check for the presence of fuel at the intake. Next check fuel pressure into injectors or carburetor. Work your way back to the fuel reservoir, checking for leaks, filter, lines, and pump, if so equipped.

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There is a few things to check:
  • make sure the battery is fully charged
  • check the seat switch (under the seat and make sure its connected).
  • disconnect the starter, put tape over the end of the starter wire to avoid a short circuit, and turn the key. see if you hear a click in the starter solenoid that is attached to the other end of the starter wire.
If the engine turns over, but doesn't start
  • Pull the spark plug and check it for fouling and proper gap. While the plug is out, turn the engine over briefly with your hand in front of the spark plug hole and see if you get strong puffs of air against your hand
  • Look at your fuel filter and see if there is any gas visible.
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1 Answer

John deere will not start

Charge the battery fully, verify good contact on the battery terminals. If it won't crank, check for voltage at the starter motor while trying to crank, check battery voltage while cranking (if it drops below 9V, the battery needs to be replaced).

If it cranks but doesn't fire, make sure it has plenty of good fresh gasoline, verify that the carburetor float valve isn't sticking shut, verify that the spark plug is good and you're getting good spark while you crank.

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If you hear a clicking sound but no joy on the starter, you may have a bad starter solenoid. Follow the positive cable from the battery, it should end up connected to the solenoid. The post the battery cable connects to should be adjacent to another post where the cable connected to that post leads to the starter, you can check by carefully crossing the two posts with a small screw driver or some other piece of metal to see if the starter will turn over, (be very careful not to touch any part of the body of the mower with the screw driver). if the motor turns over with the crossing of the posts but not with the key, then more than likely that is the problem. Replace the solenoid. NOTE: you do not have to have the key turned on for this test.

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Try replacing the starter solenoid. If that doesn't do it, try replacing the whole starter.

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John Deere 425 AWS no start, no nothing???

Sounds more like a bad starter than a bad coil.

A failing coil usually shows up during hot weather. The engine will start and run fine, then when it heats up, it just dies out. After a few minutes, it cranks again. Then the cycle repeats itself.

The ignition module and coil pack are the same part.

Are you sure full voltage is getting to the starter? There is likely a starter solenoid between the ignition key and the starter. These solenoids can be problematic and prevent the full 12 volts from getting to the battery.

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