10 Briggs & Stratton Standby Generator Problems (With Easy Fixes)

Discover the 10 most common Briggs & Stratton Standby Generator Problems and how to fix them easily.

Whether it’s startup issues or maintenance challenges, this guide simplifies everything so you can keep your generator running smoothly.

Perfect for beginners, this article addresses common concerns with clear solutions to save you time and effort.

Table of Contents

Briggs & Stratton Standby Generator Problems (Short Overview)

Briggs & Stratton standby generators can sometimes face issues like trouble starting, low power output, or strange noises during operation.

These problems are usually caused by maintenance delays, fuel issues, or worn-out parts.

Don’t worry most of these can be fixed quickly with basic troubleshooting and regular servicing. Stay proactive, and your generator will keep performing when you need it most!

1. The Generator Fails to Start

Briggs & Stratton Standby Generator Problems

One of the most frustrating problems is when your generator won’t start at all, either during a power outage or its weekly self-test.

You hear a click, or maybe nothing at all, but the engine doesn’t turn over.

Cause:
This issue most commonly points to a problem with the battery. A dead or weak battery is the number one reason a standby generator fails to start.

Over time, batteries lose their charge, especially if they are not maintained. Corroded terminals can also prevent the electrical current from reaching the starter motor.

Less common causes include a faulty starter motor or a loose electrical connection.

Fixes:

Check the Battery: Start by testing the battery with a multimeter. A healthy 12-volt battery should read around 12.6 volts or slightly higher. If the voltage is low, the battery needs to be recharged or replaced.

Clean the Terminals: Look for corrosion (a white, powdery substance) on the battery terminals. Disconnect the battery cables (negative first, then positive) and clean the terminals and cable clamps with a wire brush and a solution of baking soda and water. Reconnect the cables securely (positive first, then negative).

Inspect Connections: Ensure all electrical connections to the battery and starter are tight and secure. A loose wire can easily prevent the generator from starting.

2. The Engine Cranks but Won’t Turn Over

You can hear the engine trying to start its cranks and cranks but it just won’t fire up and run.

This indicates that the starter is working, but another part of the ignition or fuel system is failing.

Cause:
The most frequent culprit here is a fuel-related issue.

The generator might be out of fuel (natural gas or propane), or there could be a blockage in the fuel line preventing it from reaching the engine.

Another common cause is a fouled spark plug that can’t create the necessary spark for ignition.

Fixes:

Verify the Fuel Supply: Ensure the fuel valve to the generator is fully open. If you have a propane tank, check that it isn’t empty. For natural gas, confirm your service is active.

Inspect and Replace the Spark Plug: Remove the spark plug and inspect it. If it’s covered in black soot, oil, or looks worn, it’s time for a replacement. Spark plugs are inexpensive and should be replaced annually as part of regular maintenance.

Check the Air Filter: A clogged air filter can restrict airflow and prevent the engine from starting. Remove the air filter and check it. If it’s dirty, clean or replace it according to the manufacturer’s instructions.

3. The Generator Starts but Shuts Down Quickly

In this scenario, the generator successfully starts, runs for a few seconds or minutes, and then abruptly shuts down.

This is often a sign that a safety sensor is being triggered.

Cause:
Standby generators are equipped with multiple sensors to protect the engine. A common reason for a sudden shutdown is low oil pressure or high engine temperature.

The generator’s control panel detects an unsafe condition and shuts the engine off to prevent damage. An overloaded generator can also cause a shutdown.

Fixes:

Check the Oil Level: Turn off the generator and let it cool down. Check the oil level using the dipstick. If it’s low, add the correct type of oil as specified in your owner’s manual. Do not overfill.

Look for Overheating Signs: Ensure the generator’s ventilation ports are not blocked by debris, snow, or landscaping. Proper airflow is critical for cooling. If the generator is in an enclosed space, it may need better ventilation.

Reduce the Electrical Load: If the shutdown happens when appliances turn on, you may be overloading the generator. Try running the generator with no load connected. If it runs fine, you may need to manage your home’s electrical usage during an outage or consider a load management system.

4. The Generator is Running Rough

When your generator is running, you might notice that the engine sounds uneven, sputters, or vibrates excessively.

This rough operation indicates that the engine is not running efficiently.

Cause:
An inconsistent fuel supply is a primary cause. This could be due to a clogged fuel filter, stale fuel (if it’s a model that uses stored fuel), or incorrect fuel pressure.

A dirty or failing spark plug can also lead to incomplete combustion, causing the engine to run rough.

Fixes:

Replace the Fuel Filter: The fuel filter prevents debris from entering the engine. Over time, it can become clogged. Replacing the fuel filter is a standard maintenance task that can resolve many fuel-related issues.

Change the Spark Plug: As mentioned before, a clean and functional spark plug is vital. If your engine is sputtering, a new spark plug is an easy and effective fix.

Check Fuel Pressure: For natural gas or propane units, incorrect fuel pressure can cause poor performance. This check usually requires specialized tools and should be performed by a qualified technician.

5. The Generator Is Not Producing Power

The generator’s engine is running smoothly, but your house remains dark.

This means the engine is working, but the generator component (the part that creates electricity) is not functioning correctly.

Cause:
The most common cause is a tripped circuit breaker on the generator itself. This is a safety feature that protects the unit from overloads or short circuits.

Other potential causes include a faulty automatic transfer switch (ATS), a damaged alternator, or worn-out brushes within the generator.

Fixes:

Check the Circuit Breaker: Locate the circuit breaker on the generator unit. If it has been tripped, reset it by flipping it back to the “On” position. If it trips again immediately, there may be a more serious electrical issue that needs professional attention.

Inspect the Automatic Transfer Switch (ATS): The ATS is the component that switches your home’s power from the utility to the generator. Check for any visible issues or error codes on the ATS panel. Troubleshooting the ATS is complex and is best left to an electrician.

Seek Professional Help: Issues with the alternator or internal generator components are not typically DIY repairs. If the circuit breaker isn’t the problem, it’s time to call a certified Briggs & Stratton technician.

6. Leaking Oil or Fuel

Noticing a puddle of fluid under your generator is a clear sign of a leak that needs immediate attention.

Cause:
Oil leaks often come from a degraded gasket, a loose oil filter, or a cracked drain plug.

Fuel leaks are more dangerous and can originate from a cracked fuel line, a loose fitting, or a faulty fuel valve.

Fixes:

Identify the Fluid: Determine if the leak is oil (dark and slippery) or fuel (clear with a distinct smell).

For Oil Leaks: Check that the oil filter and drain plug are tight. If they are, the leak may be coming from a gasket, which will likely require professional service to replace.

For Fuel Leaks: Immediately shut off the fuel supply to the generator. Fuel leaks are a fire hazard. Do not attempt to start the generator. Inspect the fuel lines for cracks or damage and check that all fittings are secure. Due to the danger, it is highly recommended to have a professional handle any fuel system repairs.

7. The Weekly Self-Test Doesn’t Run

Briggs & Stratton standby generators are programmed to run a short self-test each week to ensure they are ready for an outage.

If you notice this test has stopped happening, it’s a signal that something is wrong.

Cause:
This could be due to a setting on the control panel being accidentally changed or a fault in the controller itself.

A dead battery can also prevent the weekly test from initiating.

Fixes:

Check the Control Panel Settings: Consult your owner’s manual to verify that the weekly exercise mode is enabled and scheduled correctly. Sometimes these settings can be inadvertently changed.

Test the Battery: As always, a weak or dead battery is a common culprit. Ensure the battery is fully charged and the connections are clean and tight.

Reset the Controller: In some cases, resetting the generator’s controller can resolve software glitches. Follow the procedure in your manual to do this safely. If the problem persists, the controller may need to be serviced or replaced.

8. White Smoke Coming from the Exhaust

Seeing smoke from the exhaust can be alarming. The color of the smoke can help diagnose the problem. White or light-gray smoke is a common sight.

Cause:
White smoke is typically caused by unburned fuel or condensation.

It can happen if the engine is running too rich (too much fuel, not enough air) or if there is water/condensation in the fuel or exhaust system.

Sometimes this occurs during cold starts and clears up as the engine warms.

Fixes:

Let the Engine Warm Up: If the smoke appears on a cold day and dissipates after a few minutes, it’s likely just condensation burning off and is not a cause for concern.

Check the Air Filter: A clogged air filter can cause the engine to run rich. Cleaning or replacing it can solve the problem.

Inspect the Choke: On some models, the choke may be stuck in the closed position, which enriches the fuel mixture. Ensure the choke is functioning correctly and opens as the engine warms.

9. A “Low Battery” or “Charger” Fault Code

Modern generators have sophisticated control panels that display fault codes to help with troubleshooting. A common one relates to the battery or charging system.

Cause:
This fault code indicates that the battery voltage is low or that the built-in battery charger is not working correctly.

The charger is supposed to keep the battery topped off so it’s ready at all times. The charger itself may have failed, or there could be a loose connection.

Fixes:

Test the Battery and Charger: Use a multimeter to check the battery voltage. Then, check the output of the battery charger. If the charger is not providing the correct voltage to the battery, it needs to be replaced.

Check All Wiring: Inspect the wiring between the battery charger, the battery, and the control panel. A loose or corroded wire can prevent the battery from charging properly.

10. The Generator Is Excessively Loud

While no generator is silent, a sudden increase in noise or a new type of sound (like banging or clanking) is a sign of a problem.

Cause:
Mechanical issues are the most likely cause.

A loose mounting bolt could cause rattling, an internal engine part may be worn or broken, or the exhaust system could have a leak.

Fixes:

Inspect for Loose Parts: With the generator off and cool, visually inspect the unit. Check that all mounting bolts securing the generator to its concrete pad are tight. Look at the housing panels to ensure they are secure.

Listen for the Source: Try to pinpoint where the noise is coming from. A noise from the exhaust area might indicate a leak in the muffler or pipes.

Shut Down and Call a Pro: If you hear any loud banging, grinding, or metallic clanking sounds, shut the generator down immediately to prevent catastrophic engine damage. These noises suggest a serious internal problem that requires a professional mechanic.

Frequently Asked Questions

1. How often should I service my Briggs & Stratton generator?

You should have your standby generator professionally serviced at least once a year. Regular maintenance includes changing the oil and filters, replacing the spark plugs, testing the battery, and ensuring all systems are functioning correctly.

2. What kind of oil does my Briggs & Stratton generator need?

Always use a high-quality synthetic oil specifically formulated for air-cooled engines. The exact weight (e.g., 5W-30) will depend on your climate. Refer to your owner’s manual for the specific recommendation for your model.

3. Can I run my standby generator on a portable propane tank?

Standby generators are designed to be permanently connected to a large propane tank or a natural gas line. Using a small, portable tank is not recommended as it will run out very quickly and cannot provide the sustained fuel flow required.

4. Why is my generator’s “maintenance required” light on?

This light is typically a simple hour-meter reminder. It turns on after a set number of run hours (e.g., 100 or 200) to remind you that it’s time for routine service, like an oil change. After performing the maintenance, you can reset the reminder through the control panel.

5. What should I do if I can’t fix my generator?

If you’ve tried the basic troubleshooting steps and the problem persists, or if you’re uncomfortable with the repair, it’s always safest to call a certified Briggs & Stratton service technician. They have the expertise and specialized tools to diagnose and fix complex issues correctly.