Briggs and Stratton Starter Motor for 5 to 24HP Models for Ride on Mower Engine…

Briggs and Stratton Starter Motor for 5 to 24HP Models for Ride on Mower Engine

info. Make 4 payments of 14.75 over 8 weeks and get it now!


  • Count the number of drive teeth on your starter motor’s drive gear. There should be 16 teeth. If there are 14 teeth please click here.

If your old Briggs starter motor has a plastic or aluminium drive gear, 16 teeth and a housing measurement between 90-110mm then this starter is a suitable replacement.

Email or call us with any questions using below contact details.

Replaces the following (OEM Interchange):

Jono Johno offers a 12-month warranty on all products. Warranty period is 12 months for the home user and 6 months for commercial use.

We pride ourselves on selling good quality kit and will be fair and prompt honouring our warranties. If you’re in trouble, we’ll help you out.

Exactly what is covered by warranty will depend on 2 things:

Minor faults caused by user. Parts will be supplied for repair at user expense.

Minor faults caused by manufacturer. Parts will be supplied for repair, with instructions provided by us on how to carry out repair. If the repair is time consuming in nature, you can contact Jono Johno to discuss labour cost compensation.

Major faults caused by manufacturer. Jono Johno will facilitate a return of the product for refund or replacement at our expense. Or if you’d prefer (at our discretion and in consultation with you), we can send appropriate parts and compensate labour costs if you can carry out the repair yourself.

Major faults caused by user. Where possible parts will be supplied at user expense. Where the item cannot be repaired by the user, Jono Johno will offer to have the item returned for repair at user expense. Our workshop rate is 60 per hour.


If you’re in reasonable driving distance of a Jono and Johno outlet, you can physically return the product yourself. Please contact us in advance to arrange a return authority.

If you are not within reasonable driving distance, Jono Johno will provide you with a return authority and an address to return the product to. Where Jono Johno is at fault a postage-paid return label will be provided.

If your product is out of warranty and is buggered, even though you’ve hardly used it, give us a call or shoot us an email. If there is a manufacturer fault or the item should have lasted a lot longer than it has, we’re happy to assess it outside of the warranty period. We do this on a case-by-case basis.

How to Start a Lawnmower with a Bad Starter?

All homeowners with lawns know pretty well that lawnmowers are unmatched machines for tending your yard. But it is only fun when the mower is working fine and smooth. When a mower is not running correctly or having problems, mowing becomes tedious and rather unenjoyable. Lawnmowers, like all machines, run into all sorts of issues. But could there be a more frustrating problem than the mower not starting at all? One of the reasons for this could be a bad starter. But don’t worry, even with a bad starter, there are ways to start your mower.

How to Start a Lawnmower with a Bad Starter:

  • Clean the battery leads and seal any leakages, then try again. Replace the battery if it is faulty beyond repair.
  • Bypass the solenoid and start the mower using the starter motor only.
  • If the starter motor is faulty, you’ll have to get a new starter motor.
  • Replacing the entire starter with a new one is better than replacing just the motor.
  • In case of a faulty ignition switch, try to make its connections tight. If it is defective beyond repair, get a new ignition switch.

Reasons for a bad starter:

The starter is responsible for using the energy of the battery to start the engine. A bad starter won’t do this job, and the ignition system won’t get any energy, which means that there will be no spark and the engine will not start. A starter can go wrong because of these causes:

The final solution to a bad starter can be to replace one or more parts, but techniques like bypassing the solenoid can let you start the mower for now, and you can do the replacement later. To do that, you’ll need to get some basic information about a starter and its working. This article will surely help you in this regard.

What is a Starter?

The starter is an essential component in a lawnmower that transfers electricity from the battery to the ignition system, thus allowing the engine to start. A starter has two main components, a starter solenoid, and a starter motor.

Starter Solenoid:

Solenoid gets current from the battery and transfers it to the motor. When the ignition button is pushed, a current is sent from the battery to the solenoid through the wiring and then from the solenoid to the motor.

Starter Motor:

The starter motor is the starter component that is linked directly to the spark plugs. It sends current from the starter to the engine.

These two components are independent but work together to power the spark plug so that a spark can be generated in the combustion chamber, producing power from fuel. Though the starter solenoid and motor are independent, the chain is disrupted if one fails, and the engine won’t start when you push the ignition button. But because these two components are separated, the mower can still be turned on if one goes bad.

Before making any repairs or changes, you need to know what’s wrong. A lawnmower with a bad starter will show specific symptoms that can help you see the problem’s root cause.

Symptoms of a Bad Starter:

A satisfying rumble sound is always expected when starting the engine, but a mower with a bad starter will make abnormal sounds when it is being started. The sounds can be used to judge the nature of the underlying problems.

Abnormal Solenoid Clicking:

When the ignition button is pushed, the solenoid transmits an electric spark that starts the motor. The motor starts rotating a smaller gear that engages with a larger gear of the engine. This is how the engine is jump-started. When this process goes normally, a clicking sound is produced, followed by a whirring sound that indicates that the starter motor is engaging with the engine.

If you push the ignition button and only the clicking sound is produced, it is a sign that something is wrong and the motor is not engaging with the engine’s gear.

Whirring sound, but no Catch:

When the whirring sound is produced but is followed by a loud rumbling sound, it is a sign that the starter is not engaging with the engine in the normal manner. This is a sign of the starter’s smaller gear not correctly engaging with the engine’s gear. Another sign of this issue is when the engine starts but stops after just a moment. Broken teeth basically cause these problems on the starter motor’s gear or worn motor brush brushes. If this is the case, these faulty components will have to be replaced.

Not Starting Even with a Fully Charged Battery:

If your mower does not start even though there is no battery-related issue, it is the clearest and obvious indication that the starter isn’t working fine. When this happens, start looking for the cause of problems right away.

Solenoid Not Clicking:

If there is no solenoid clicking sound when you push the ignition button, it is an indicator of loose connections to the solenoid. This means that the current is not reaching the solenoid. If this is the case tightening solenoid connections will get your mower running.

Starting a Mower with a Bad Starter:

A bad starter is caused by electrical problems that can be fixed. Here’s a guide on how to do that.

Flat or Faulty Battery:

The first thing to get in order when your mower is not starting is the battery. If the battery fails to provide electricity, there is no way your mower will start.

Start by looking for leakages. Charge the battery with a charging cable, and if it becomes wet, then the battery is leaking. Small leakages can be sealed, but if the leak is too big, replace the battery. When dealing with leaks, wear safety gloves and glasses to avoid acid burns.

Check the battery voltage too. The battery voltage should be 12V. If the voltmeter reading is less than 12.4V, it is a sign of a faulty battery that needs to be replaced.

Ignition Switch:

Loose connections of the ignition switch wire or corrosion on the back part of the switch can also cause a bad starter. If the issue is not of a severe nature, you can fix it yourself. If the ignition switch has become so bad that it can’t be repaired, it should be replaced with a new one.


The starter solenoid is a mounted switch that provides current to the engine’s starter motor. The solenoid has four threaded electrical lugs connected to the battery, ground, ignition switch, and starter motor.

Different lawnmower models have their solenoids at different locations. You can locate the solenoid in your mower by following the red battery wire. After locating the solenoid, check its connections and screws and tighten them using a wrench or a plier. Rotate the ignition key. If the solenoid clicks without starting the mower, the solenoid needs to be replaced.

Starter Motor:

The starter motor is attached to the crankcase of the engine. If you have already checked the components mentioned above and they are fine, but your mower is still not starting, the chances are that its starter motor is faulty.

To check the starter motor, connect it to the battery using a jumper cable while attaching a negative terminal screwdriver. You’ll see some sparks, but there is no danger of shock from a 12V battery. If the motor doesn’t start and gives clicking sounds, the motor is faulty.

Sometimes the winding, magnet, brushes, etc., inside the mower can get dirty or burn during use. Fixing them can solve the issue too.

briggs, stratton, starter, motor

A faulty motor can be rebuild. But this has to be done by a professional electrician.

Bypassing the Solenoid:

Like said before, the starter solenoid and motor are two independent components. If you have determined that only the solenoid is faulty, you can try to start the mower using the starter motor only.

A solenoid has wire connections from the battery/ignition switch. To bypass the solenoid, connect these wires to the motor using a metallic connection. Then try to start your mower. If it produces a whirring sound, it means that the mower can be started. You’ll need to try a couple more times to start the mower.

Use protective equipment while bypassing the solenoid.

Final Remarks:

The lawnmower not starting on a potentially enjoyable mowing day is very frustrating. Mowers fail to start when their starters go bad. But most of the time, starter problems are not too complicated and can be fixed by the user. Follow the guidelines mentioned in this article to get your mower running once again. Checking other electrical components such as spark plugs will help too.

Ride on mower starter

Lawnmower Parts Online is an Irish owned company who’s goal is to provide a one-stop shop for parts and service kits for all your garden machinery. We provide these parts at great factory-direct prices.

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briggs, stratton, starter, motor

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Riding Lawn Mower Won’t Start—What Could Be Wrong?

You hop on your lawnmower, ready to spend your time mowing your lawn, only to realize it won’t start. What could be the issue? Well, fortunately for you, we’ve researched in-depth the reasons your lawn mower won’t start and have some possible answers for you.

Your riding lawn mower not starting could be because:

We’ve given you several reasons that could be preventing your riding lawn mower from starting. However, you should keep reading as we elaborate on each one and give you ways to diagnose each issue. Additionally, we’ll go over some other questions you might have about your lawn mower starter or battery.

Out of Gas

Just like cars, lawnmowers can run out of gas too. Fortunately, the easiest problem to diagnose is whether there is gas in your lawnmower. So, is it possible the tank is low on your mower? Some gas tanks have a dipstick that you can use to check the fuel level. If it’s low, try topping it up and then try to start your lawnmower again.

Gas is Stale

If the gas isn’t low but has been sitting in the tank a long time, this could also be an issue. Gas that has been in the tank a long time without being used can become stale.

Old Briggs and Stratton TWIN FLATHEAD Riding Lawnmower engine HOW TO REPLACE a STARTER MOTOR by Jeff

One of the easiest ways to tell if your gas is stale is to open the gas tank and smell it. The gas will smell like varnish instead of gas, and its appearance will also be different. Stale gasoline will look muddy or darker than it originally did.

Bad Battery

If the gas isn’t to blame, the problem could be with the lawnmower’s battery. You can check whether a lawn mower’s battery is dead by using a multimeter. Multimeters are used to test electrical voltage, currents, and resistance.

The multimeter will let you know the voltage of the battery in your lawnmower. If it’s 12.7 volts or higher, the battery is fine, and the problem lies elsewhere. If it is below 11.5 volts, you will need to replace the battery with a new one. Sometimes the reading may be between 11.5 and 12.7. If this is the case, the battery may just need charging.

How long do riding lawn mower batteries last?

Riding lawn mower batteries typically last around 3 to 4 years. Once a battery passes this point, you’ll likely start to encounter issues with it. Your lawnmower might begin to lose power, and eventually, it won’t start at all.

How much does a riding lawn mower battery cost?

Lawnmower batteries will typically cost between 50 and 75. However, there are more expensive and cheaper options available depending on the type your mower needs.

Briggs & Stratton Lawn Mower Engine Starter Motor #799045

Bad Alternator

There are several signs you can look for that might point to the alternator of your lawnmower being a problem. If your battery keeps dying, but the battery itself is fine, the alternator might be to blame. You can also test the alternator with the multimeter device we mentioned earlier. Your owner’s manual should tell you what reading you should achieve from the multimeter.

You can also test the alternator by performing a test using the headlights. If you turn on the lights and then turn off the power to your lawnmower, the lights should dim. If they do not dim, there is a problem with the alternator. Alternators typically go bad due to overheating. Think back to whether you’ve been running your mower for long periods of time, as this could be to blame.

Bad Starter Motor

Once you’ve tested the alternator or battery and found they aren’t the problem, you should switch your diagnostics to check the starter motor. The starter motor is the connection between the battery and the lawn mower’s ignition system. If you are having any electrical issues that can’t seem to be ruled out as issues with other parts, the starter motor may be to blame.

What are the Symptoms of a Bad Starter on a Riding Lawn Mower?

Symptoms of a bad starter on a riding lawn mower include the lawn mower not starting or clicking or cranking noises coming from the mower when you try to start it. The most obvious sign you have a problem with the starter motor will occur when you turn the key. If you turn the key and it makes a noise, but the engine doesn’t start, it’s likely the starter.

How Do you Test a Lawn Mower Starter?

You can test a lawnmower starter using jumper cables. Before you attach the jumper cables, make sure to brush off any dirt or debris that might have accumulated. This will help promote the best possible electrical connection.

Once you have attached the jumper cables, the starter should turn over. If it doesn’t, you will need a new starter motor. If the starter does turn over, this likely isn’t the part of the mower that is preventing it from starting.

Sometimes it’s easier to see the process done to understand what you have to do, so if you’d like to see a video on how to test a lawn mower starter, check out this handy YouTube tutorial:

How Do you Start a Riding Lawn Mower with a Bad Starter?

So what if your starter is bad, but you desperately need to mow your lawn? Well, unfortunately, if your starter is truly bad, you can’t. You will need to replace the starter before you try to mow your yard.

However, first, you should make sure that it is definitely the starter causing you problems and not the battery or alternator. You can also try cleaning any dirt and debris from the parts to see if that is causing interference.

Low Oil Level

If the issue with your mower doesn’t seem to be electrical or gas related, it could be your oil level. Many ride-on mowers, especially newer models, will not start if the oil level is too low. This is in order to prevent damage to the engine of the mower.

Your lawnmower should come with a dipstick in the oil tank so you can check the level. Wipe the dipstick clean and reinsert it. Remove it again to see the current oil level.

If your oil is, in fact, low, check your owner’s manual to see which type of oil your mower needs, and follow the instructions for adding oil to your machine.

Problem with the Ignition Switch

If you’ve noticed your lawnmower stalling during previous uses, this could indicate you have a problem with the ignition switch. It can cause the engine to stall and then be the reason it won’t start later on.

Just like the battery and the alternator, the ignition switch can be tested using a multimeter to measure the ohms of the switch. To measure the ohms of the switch, the multimeter should be set to resistance mode.

Here’s a YouTube video showing you a way to test your ignition switch:

Seized Engine

If your lawnmower has been sitting in storage for a long time, it might have a seized engine. A seized engine will prevent the mower from starting. Engines can seize due to low oil levels or from being exposed to the elements too long.

Fortunately, there are methods you can try to unseize an engine. Depending on how bad the engine is, it may require more complex methods to unseize it, and you may need a professional. However, if this doesn’t work, you will likely have to replace the mower entirely.

The most simple method involves removing the engine’s spark plug and using an engine lubricant to help unseize the engine. After you have got the engine moving again, you should replace your engine’s oil to help prevent it from happening again.

If all of this seems a little overwhelming, don’t hesitate to call a professional to take a look before completely giving up.

Final Thoughts

As you can see, there are a lot of issues that could be preventing your lawnmower from starting. Hopefully, with the help of our article, you are one step closer to figuring out the problem with yours. Fortunately, most of the issues are relatively easy to check for, so you should be on your way to a running mower again soon! Good luck!

For more reading on similar topics, check out some of our other blog posts:

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