When Your Lawn Mower Blows a Fuse When Starting (2023)

When your riding lawn mower blows a fuse, the cause may be as simple as damaged wiring. In some cases, a blown fuse may also be the result of an ignition system problem.

In this article, we will look at the Ignition switch, coil, contacts, and damaged wiring. If none of these steps fix the problem, contact the manufacturer for assistance. It might be possible to repair your blown fuse yourself, but most lawn mowers use a gas or diesel engine.

Damaged wiring

The electric motor of your lawn mower may stop working due to damaged wiring. It may be exposed or buried, but it can still be fixed. A skilled electrician can repair the problem. In case you are unsure about the repairs, you can use a multi-meter to test the continuity of the main fuse and check for other problems. Also, make sure that the negative cable is disconnected from the battery. If all of the steps fail, contact a professional electrician for a proper diagnosis and repair.

The most common problem that can lead to a problem with the electrical system of your lawn mower is damaged wiring. This wiring is responsible for giving your machine an electrical spark. Without it, the engine cannot produce enough energy to start the engine. Luckily, it’s relatively easy to fix. All you need are some tools and a screwdriver. The next step is to replace the ignition switch. Most auto parts stores carry a generic style ignition switch. Make sure to disconnect the negative cable before removing the switch. This will prevent arcing or other electrical problems.

(Video) Lawnmower Fuse keeps blowing every time I turn the key on

If the problem persists, try replacing the ignition switch. Sometimes the wiring inside the mower can be damaged, which causes the engine not to start. If you don’t have a spare switch, you can buy a new one at a local Craftsman dealer. A bad ignition switch may also be a cause of the problem. In most cases, a problem with ignition switches can be repaired without spending much money.

Ignition switch

If your lawn mower won’t start, you may be having problems with the ignition switch. A blown fuse occurs when the electrical current in the ignition switch is interrupted, and that interrupt is a direct cause of the problem. If you have a separate starter solenoid on your lawn mower, you can check to see if the fuse is blown. Otherwise, you can check the wiring connector between the two parts and try to reconnect them to determine the problem.

Whether your lawn mower’s ignition switch is faulty, or it is merely a simple short, the problem is easily fixable. It’s easy to replace the ignition switch, but the next step is to find out what’s causing the problem. To do this, you need to check the wiring harness or the ignition switch for any broken wires. If this doesn’t work, you’ll need to replace the engine as well.

If your lawn mower’s ignition switch is blowing a fuse, it’s probably the wiring harness. The wiring harness is where the ignition switch and the power take-off (PTO) switch go. You may be able to find a wiring harness on the front of your lawn tractor. If it’s not there, it’s likely to be in the same place as the ignition switch.

(Video) Lawn Tractor Blowing Fuses

A damaged or faulty red wire can cause a blown fuse. The ignition switch sends power to the blue wire when the engine is turned on. If the red wire is damaged, it will short the circuit. To check whether your ignition switch is faulty, pull out the red wire that connects to the fuse holder. If you have to do that, the problem is most likely the ignition switch itself.

Ignition coil

When your lawn mower won’t start, you might have a blown fuse in the ignition coil. To fix this problem, you must replace the fuse with one of the same amperage or visit your local repair shop. You can also contact your lawn mower dealership for help with the electrical failure. Often, a blown fuse is the result of an overload of the ignition coil. The new fuse should have no problem starting your lawn mower, and you can also try to replace the ignition coil in your lawn tractor.

Another cause of the problem may be a clogged air filter or gas tank. The air filter may be dirty or clogged. The carburetor could be faulty, and this will cause the lawn mower to run rough. If you have a dirt filter, check it to ensure that fuel is reaching the engine. If this is not the case, replace the carburetor.

In the case of a riding lawn mower, the blown fuse may indicate a short circuit. If the engine cannot start, the ignition fuse is probably blown in the engine. The wiring harness should be checked to make sure there are no faulty wires in it. To test if the ignition fuse is the culprit, remove the ignition switch and check the wiring harness. Otherwise, you need to replace the entire engine.

(Video) John Deere Lawn Mower won't start | fuse keeps popping | bad solenoid

A good first step to troubleshoot this problem is to inspect the solenoid. You’ll need a screwdriver to check these. If you see any large terminal posts, they are most likely bad. A small section of the motor will short out. Once you’ve removed the bad solenoid, try starting the engine and see if you can start it. If the engine will start, it’s a bad solenoid.

Ignition coil contacts

If your riding lawn mower is not starting, chances are you have a blown fuse in the ignition. Fortunately, replacing a blown fuse is relatively easy. However, identifying the problem is not as simple. In some cases, the problem may lie with the solenoid, an electromagnetic switch that actuates the starter motor. To identify if your solenoid is blown, check the wiring around the switch to see if it has become hot, melted or smokey.

Older mowers often use condensers and points to ignite the engine. Like spark plugs, these components wear out and eventually fail, too. Replacing the ignition components will restore the spark. However, mowers built after 2000 use an electronic ignition component. Although these systems are generally more reliable, they still wear out and develop damage. It’s best to replace these parts if possible.

You may need to disengage the fuel tap if the lawn mower needs to be placed on its side. Then, disconnect the spark plug lead and check the engine’s flywheel brake. If the brake is broken, the mower may not start. If the flywheel brake cable is broken, the mower may be stuck or jammed. To access the flywheel brake, unscrew the cowling on top of the engine.

(Video) How to Find the Cause of a Blown Fuse on Riding Lawn Mower

If you still don’t see a spark, the problem may be in the ignition switch. To test if the switch is shorted, connect a small 12V bulb to one end. If it’s a dead short, the bulb will light up. If it is not, move the wires or remove connectors and check for bare spots. If the light comes on, the ignition switch is likely the problem.

Ignition switch internal contacts

If your riding lawn mower’s ignition switch stops working, you have a problem. A blown fuse can indicate a number of problems, from a short circuit in the wiring harness to a faulty engine. If the problem persists after changing the fuse, your next option may be to replace the entire engine. Here are some tips for troubleshooting a blown lawn mower fuse.

First, remove the battery box. Next, check the ignition switch. It’s located next to the starter solenoid. Check the fuse for continuity using a multi-meter. If it’s blown, it’s more likely the ignition switch itself, but a component that’s faulty might be causing it. The best way to diagnose the problem is to take the mower to a mechanic who specializes in this.

If you’re not sure what’s causing the problem, check the fuse holder. It should be able to measure an infinite amount of resistance between the two spades. If you’re unable to get a reading, then the problem is in the ignition switch. Alternatively, you can test the fuses one by one. If you can’t find any, you can use an ohmmeter to check for a low resistance between the Brown/bLue wire and the negative terminal of the battery.

(Video) Blowing a fuse on your mower when Engaging PTO?

If the problem persists, check the safety sensors. Some models have a safety sensor installed under the hood. A malfunctioning safety sensor may prevent the mower from starting. Once the safety sensors have been reset, the ignition switch should work again. A faulty ignition switch is the main cause of a blown fuse in a lawn mower. The safety sensor can prevent the engine from starting, so it’s essential to ensure that the safety sensors are working properly.

Videos

1. How to find a short that keeps blowing the fuse on a riding mower
(Bingham Mechanic Services)
2. Blowing Fuses on a John Deere LA110 Lawn tractor. How to find a Short to ground.
(Weekend Hobby Mechanic)
3. Zero Turn Mower Blowing Fuse
(Paul Haines)
4. When I turn the key on my mower it blows the fuse. Sport and
(JustAnswer-Q&A)
5. ALL MOWER BRANDS DEADLY FIRE HAZARD in WIRING / Why did my FUSE BLOW?? Backyard Mechanics
(Elite Landscapes Life Stories)
6. Mower Blowing Fuses & Blades Cutting Out (The Entire Repair Process)
(Dulin Cut & Trim)

References

Top Articles
Latest Posts
Article information

Author: Prof. Nancy Dach

Last Updated: 04/01/2023

Views: 6059

Rating: 4.7 / 5 (57 voted)

Reviews: 80% of readers found this page helpful

Author information

Name: Prof. Nancy Dach

Birthday: 1993-08-23

Address: 569 Waelchi Ports, South Blainebury, LA 11589

Phone: +9958996486049

Job: Sales Manager

Hobby: Web surfing, Scuba diving, Mountaineering, Writing, Sailing, Dance, Blacksmithing

Introduction: My name is Prof. Nancy Dach, I am a lively, joyous, courageous, lovely, tender, charming, open person who loves writing and wants to share my knowledge and understanding with you.