new – with ignition swith to “on”.

Good battery, good ground connection, all other connections and wiring seemingly OK with continuity OK; ignition switch OK, circuit breaker OK –

So where do I look now – ??? If I replace the starter solenoid again – what is causing it to fail after a couple of starts??
42 in. Deck 19.5hp Lawn Tractor

Experienced gardeners share their insights in answering this question :
Hi NiteRanger shorting out the two large terminals on the solenoid does not mean the solenoid is working !!!! The test for ascertaining whether it works or not is to disconnect the wire on the small terminal and then connect a wire to the positive terminal of battery and briefly touch it to the small terminal if starter operates then solenoid is good.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

What to Do If Your Tractor Won`t Start, Just Clicks. If your John Deere won`t crank and all you hear are clicking sounds when you turn the key, you likely have a bad battery or a bad connection somewhere between the battery and the starter. Double check that the alternator and battery connections are clean and tight.
Use a portable jump starter or use another car to jumpstart your vehicle. Either with a portable jump starter or with a jumper cable connected to another car. It`s pretty easy to jumpstart your vehicle. All you have to do is connect to identify the ignition coil and the battery.
In bypass starting, you touch a wrench or a screwdriver to the terminals of the starter motor, to the solenoid of a tractor, or to other equipment. This bypasses all tractor-neutral starting switches. Sparks fly and electricity snaps as the circuit is completed, the starter engages and the engine starts.
It might be a battery or alternator problem.

A rapid clicking noise when trying to start your car could mean there`s something wrong within the electrical system. Perhaps your battery`s dead, or your alternator, which charges the battery, isn`t working correctly.

Touch the metal shaft of a screwdriver to both of the large terminals at the same time. If the engine turns over and starts, the solenoid is bad and should be replaced. If the starter motor does not run, the motor itself is probably defective.
An engine that refuses to start can be another sign of a bad ignition switch. The ignition switch sends power to the the starter motor, engine controls, and ignition controls. These systems may not receive the power they need to start up if the ignition switch isn`t working properly.
If rusting is the issue, you can bypass the bad starter solenoid wire. To do so, use a 12V wire to directly provide current from the car`s battery to the point where the starter and solenoid connect. You`ll hear a click sound indicating that the connection is made.
The most common cause for the engine not turning over is simply the battery. Either the battery itself is dead, the terminals are corroded so the current can`t travel through them, or the battery cables themselves are damaged. Inspect your battery terminals and cables, and test the battery.
Set your multimeter to be on the Ohms scale. Place one probe on the lead on the ignition circuit terminal and the other on the ground lead. The reading should be less than 5 Ohms. If it`s more than that, the starter relay is faulty and needs to be replaced.
Why does the tractor make a clicking sound and not start? If the riding mower makes a heavy clicking or a rapid clattering sound when the key is turned to the start position, there is a problem with the battery or a part of the starting circuit. The clicking noise comes from a part called the starter solenoid.
Let someone turn on the ignition key or press the starter button. Observe the light — if it doesn`t turn on, the solenoid is likely failing to transfer power and might need replacement. However, if the light turns on but there`s no clicking sound or starter engagement, the issue lies with the car starter.
Bad Sensors

Sensors that fail to send information to the computer may cause the engine to run less efficiently, and they can sometimes be the cause of an engine that won`t start. One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft.

The most obvious sign of faulty spark plug wires is your vehicle just feels a little `off. ` It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.
After replacing the ignition switch on your vehicle you should be able to reprogram it manually. Putting the key into the ignition and leaving it there for a few seconds until an indicator comes up on the dashboard saying “key teach in progress” . After doing that 3-4 times the vehicle should start up as normal.
Most modern vehicles now have small moving parts inside the ignition switch of the vehicle. If any of these small moving parts become misaligned, this could cause the ignition switch to lock up. When this issue occurs, the most common repair would be to replace the ignition switch.
Clip one end of a spark tester to the ignition cable and ground other end to the cylinder head. Spin the flywheel rapidly (at least 350 RPM) and watch for a spark in the tester window. If there`s no spark the coil will need replaced.
Solenoid coil failure can be caused by a number of factors. Applying an incorrect voltage to the coil will cause it to fail and may cause the coil to burn out. Electrical surges or spikes may also damage the coil. Burnt out coils cannot be repaired and will need to be replaced.
Common Signs of a Bad Starter

The engine won`t turn over. The most common signal that your starter has a problem is if nothing happens when you turn the key or push to start. Unusual noises, such as clinking, grinding and whirring. If you ignore these sounds, it can eventually lead to damage to the engine flywheel.

Turning your key in the ignition triggers the starting system by sending power from the battery to the starter solenoid. The starter solenoid then activates the starter motor, which spins the engine a few times to turn it on.
Abnormally high or abnormally low ambient temperatures to which a solenoid is exposed for an extended time may cause a solenoid to burn out. High Temperature. Coil insulation may be damaged and one layer of wire may short to the next layer. A heat shield or baffle will give some protection against radiated heat.
The most common cause for slow or hard cranking is a poor ground circuit or bad electrical connection. With your John Deere, I would tend to think that it is weak ground either at the cable or where tractor ground/starter mounts. A tractor, in the same manner as a car, uses a DC electrical system.
One of the best ways to determine if a car fuse has blown is by using a test light. It should illuminate both ends of the fuse, and, if it doesn`t, it needs to be replaced. Sometimes, a blown fuse is caused by a damaged wire, motor, or other part.
If your starter relay has gone bad, the electrical signal will never make it from the battery to the starter motor. As a result, your engine won`t turn over – no matter how many times you turn the key. A faulty relay often produces an audible clicking sound when you turn your car.
These conditions eventually stop your engine in its tracks and a professional technician will be required to restore function. However, if an engine seizes due to rusted cylinder walls, you can restart the engine without professional help.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Mastercraft 18hp B&S lawn tractor
Won’t start with key BUT am able to “hot wire” by srewdriver blade across starter solenoid – recently put in new – with ignition swith to “on”.

Good battery, good ground connection, all other connections and wiring seemingly OK with continuity OK; ignition switch OK, circuit breaker OK –

So where do I look now – ??? If I replace the starter solenoid again – what is causing it to fail after a couple of starts??

ANSWER : Hi NiteRanger shorting out the two large terminals on the solenoid does not mean the solenoid is working !!!! The test for ascertaining whether it works or not is to disconnect the wire on the small terminal and then connect a wire to the positive terminal of battery and briefly touch it to the small terminal if starter operates then solenoid is good.

I have had an electrical problem with this mower since ive had it. I have just changed the solenoid and switch and have looked at the wiring and switches all day and still nothing im getting power to the switch and to the solenoid but nothing happens when you turn the key no clicking or nothing power is not transferring to starter side of solenoid I can jump it off with a wire from the ignition to starter or from crossing poles of solenoid I went and bought another solenoid and that is not it, model is a1991 18.5hp briggs with 42 inch deck do ineed to replace wiring harness or how can i check that
ANSWER : Soliniod should have two small terminals one should get power when turn key to start position the other runs through ground curcuit which runs through break and pto switch most tractors wont start with out break switch working properly i would start with that first the i would go to pto switch. hope this helps

Lawn tractor won’t start has charged battery ignition key will not start when fully turned to the right.I have started it by jumping the contacts on the solenoid. but now that won’t work
ANSWER : There are several kill switchs one is at the deck lowering handle , others are on the gearshift , you probably burnt out the solinoid using the screwdriver its and easy replace? these are also bad on starters they burn up quick? if you go to type in your model # it will show you expolded veiw of the switchs with a test light and a little mech ability you can fix it ? hope this helps

My dls 3500 mower will not start at all, I charged the battery but the engine wont even turn. All the wiring and fuses seem to be ok
ANSWER : I had the same problem. I replaced the wiring harness for a short fix, corrosion in the terminals that connect to ignition switch. This worked for a while. Then replaced ignition switch this also worked for short time. Now I just open the hood to reach behind the ignition switch and wiggle wires while turning key to start until it starts keep wiggling to get good contact. If it won’t stop after it starts, wiggle wires after you turn the key to off. It will stop.

Mower won’t start
ANSWER : This may sound stupid but don’t mean it to…
Have you tried with the choke all the way open? Do you have an automatic cruise? Is the right (correct) pedal being pushed in? These will affect if it starts or not. Also if your drive belt or one of the other belts not being tight enough will affect if it starts or just turns over. Not too many things can stope it from starting with new/good battery AND if its getting gas. Try cleaning your gas line and obviously making sure there is no obstruction around or near your blade, if it does start with blade engaged that is :))
If it doesn’t start with blade engaged, well make sure it’s in neutral. Mine won’t start in reverse but will in forward or neutral.

Hope it helps.


I have an older Kubota tractor, model B7100 HST. Was running the tractor and had electrical smoke/short? Took the dash off and noticed that the regulator was fried and melted no other apparent damage. I assumed the problem was within the regulator……..bad mistake. Bought a new regulator. Hooked up all the wires and started the tractor. Seemed to run fine and shut it down. Used the tractor for about 10-15 minutes the next day noticed smoke once again coming from under the dash. Shut the machine down. Everything within the dash wiring bundle was fried. I mean really messed up. Wires were melted together new regulator was toast – literally! So I assumed once again that there was a short within the dash wiring bundle since none of the damage occured past the main connection between the dash and the wiring bundle that leads to the rest of the engine, starter etc.
I ordered a new complete dash wiring bundle, and new regulator. Hooked it all up and turned the ignition key and smoke just started again. Unhooked the battery immediately. Seems I caught it in time without doing any damage – I hope. The only thing I have not changed within the dash is the ignition switch. Spoke to one of the machanics at Kubota and I suggested perhaps it was the igntion switch? He didnt think so but didnt really know what to suggest. He suggested looking down the entire length of the wiring bundle for any wires that maybe have worn through and “gone to ground”. I have looked but nothing is apparent. I should also mention that in all instances NONE of the three fuses within the dash have blown. The fact that none of the other part of the wiring harness past the dash main harness connection makes a person believe the problem is occuring within the dash? I’m thinking of replacing the switch.
Any advice would be appreciated.
Thanks, Barry
ANSWER : It does sound like a dead ground inside the ignition switch and I don’t know why the mechanic didn’t tell you that since it’s not the first time they have heard about this issue.

Toro 149cc Lawn Mower Won't Start – Toro Lawn Mower With Toro Power Tools
ANSWER : Bad carburetor your old fuel jammed up the jet so it won’t get fuel and if it does it will start and shut off So replace the carb or try to clean the jet and run non oxy fuel only

My mower will start but won't stay running – Toro LX466 22HP Lawn Tractor 13RT61RH244
ANSWER : I am going to respond 2 times to this post. The first reply will be generic things to check.
First off check the oil level and make sure it is serviced to full.
If your having a lack of fuel (runing lean) you will need to check fuel flow at the carb fuel mainfold. It should fill a spray paint can lid in less than 10 seconds but teting flow rated of the main fuel line. If you have poor flow here… you need to check the fuel filter and the fuel tank outlet port for obstructions.

Good Fuel flow still shutting off…. remove the carb float bow and clean the debris from the bow’ and the treaded area where the fuel solenoid mounts Additionally you will have to again remove the main fuel line and spray carb cleaner in the float needle area to flush out any debris through the fuel hose connection.

For the second response I need to know which engine is installed on your mower by MODEL number if you can locate it. (there are 3 engines) At least try to find the engine model number. If you can not locate it Brand and HP of the engine (I assume 22 hp) Thanks for choosing FixYa,