Most Common Briggs & Stratton Engine Issues

Briggs & Stratton engines are renowned for their reliability and durability, powering a wide range of outdoor equipment. However, even these robust engines can encounter issues over time. Understanding the most common problems can help you maintain your engine and troubleshoot any potential issues. Let's delve into the most frequent challenges faced by Briggs & Stratton engine owners.

Why Does My Engine Backfire or Afterfire?
Why Does My Engine Backfire or Afterfire?

Regular maintenance and prompt attention to minor issues can significantly extend the lifespan of your Briggs & Stratton engine. However, it's essential to be aware of the common problems that can arise, even with proper care. These issues can range from minor inconveniences to severe malfunctions that require professional repair.

Briggs and Stratton Parts Diagrams | My Wiring DIagram
Briggs and Stratton Parts Diagrams | My Wiring DIagram

Engine Won't Start

One of the most common issues with Briggs & Stratton engines is difficulty starting or failure to start altogether. This problem can stem from various causes, ranging from simple to complex.

Briggs and Stratton Engine Surging, Stalling & Backfiring fix (parts used below)
Briggs and Stratton Engine Surging, Stalling & Backfiring fix (parts used below)

First, ensure that your engine has sufficient fuel and that the fuel is fresh. Briggs & Stratton engines have a fuel life of about 30 days, after which the fuel can begin to break down and cause starting issues. If the fuel is old, drain the tank and refill it with fresh fuel.

Faulty Spark Plugs

How to Repair a Briggs & Stratton Starter Mower
How to Repair a Briggs & Stratton Starter Mower

Spark plugs play a crucial role in igniting the fuel in your engine. If they're fouled or worn out, they may fail to create a strong enough spark to ignite the fuel, leading to starting difficulties. Inspect your spark plugs and replace them if necessary.

Worn-out spark plugs can cause misfiring, poor engine performance, and even complete failure to start. Briggs & Stratton recommends replacing spark plugs every 25 hours of operation or once a year, whichever comes first.

Clogged Fuel System

How to adjust valves on an OHV Briggs
How to adjust valves on an OHV Briggs

A clogged fuel system can prevent your engine from starting. Over time, fuel can gum up and clog the fuel lines, filter, and carburetor. If you suspect a clogged fuel system, you may need to clean or replace these components.

To clean the fuel system, you can use a fuel system cleaner additive in your gas tank. Run the engine for a few minutes to allow the cleaner to work its way through the system. If the problem persists, you may need to disassemble and clean the carburetor or replace the fuel filter.

Engine Overheating

How To Fix the MOST COMMON problem on MOST COMMON Lawnmower Briggs and Stratton engine wont start
How To Fix the MOST COMMON problem on MOST COMMON Lawnmower Briggs and Stratton engine wont start

Overheating is another common issue with Briggs & Stratton engines. Overheating can cause severe damage to your engine, leading to costly repairs or even a complete engine replacement. Regular maintenance can help prevent overheating and keep your engine running smoothly.

Check your engine's cooling system regularly to ensure it's functioning correctly. Inspect the cooling fins for any signs of damage or blockages. Clean any debris or dirt that may have accumulated on the fins, as this can hinder heat dissipation.

Briggs And Stratton 6Fbc Engine Operators Repair Part Manual Service Owners & Bs
Briggs And Stratton 6Fbc Engine Operators Repair Part Manual Service Owners & Bs
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How To Fix Briggs & Stratton Surging Engine | Nikki Carburetor Cleaning | Motor Hunts UP & DOWN
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a man is working on an engine with a wrench
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Briggs & Stratton- Found Problem
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the ultimate guide to auto repair for beginners
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Videos: Small Engines, Mowers & Repair | Briggs & Stratton
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Briggs & Stratton Ready Start fixed! 175cc
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Briggs and Stratton Bad Points Causing No Spark
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Easiest Way To Fix A Common Briggs Plastic Carburetor Problem
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Easiest Way To Fix A Common Briggs Plastic Carburetor Problem
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Briggs & Stratton Engine Parts and Diagrams
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a man standing in front of a green background with the words how to replace the ignition coil on just about any small engine
Diagnosis of NON STARTING 5HP Briggs Engine
Diagnosis of NON STARTING 5HP Briggs Engine

Faulty Cooling Fan

The cooling fan plays a vital role in keeping your engine at a safe operating temperature. If the fan fails, your engine may overheat, leading to severe damage. Inspect your cooling fan for any signs of damage or wear. If the fan isn't spinning when the engine is running, it may need to be replaced.

Additionally, ensure that the fan's relay and thermostat are functioning correctly. A faulty relay or thermostat can prevent the fan from engaging when the engine temperature rises, leading to overheating.

Low Coolant Levels

Insufficient coolant can cause your engine to overheat. Check your engine's coolant levels regularly and top them off as needed. If your engine is consistently using coolant, it may indicate a leak or other underlying issue that requires professional attention.

Always use the recommended coolant for your Briggs & Stratton engine to ensure optimal performance and prevent corrosion. Never use water alone, as it can cause severe damage to your engine.

Loss of Power

Loss of power is another common issue that can affect Briggs & Stratton engines. This problem can be caused by various factors, ranging from simple to complex.

First, check your engine's air filter. A clogged air filter can restrict airflow to the engine, leading to a loss of power. Replace the air filter if it's dirty or damaged.

Worn-out Carburetor

The carburetor is responsible for mixing fuel and air in the correct ratio for combustion. If the carburetor is worn out or damaged, it may not be able to provide the engine with the correct fuel-air mixture, leading to a loss of power.

Inspect your carburetor for any signs of wear or damage. If the carburetor is dirty or clogged, clean it using a carburetor cleaner. If the problem persists, you may need to replace the carburetor.

Faulty Ignition Coil

The ignition coil plays a crucial role in creating the spark that ignites the fuel in your engine. If the ignition coil is faulty, it may not be able to create a strong enough spark, leading to a loss of power.

Inspect your ignition coil for any signs of damage or wear. If the coil is faulty, replace it with a new one. Briggs & Stratton recommends replacing the ignition coil every 25 hours of operation or once a year, whichever comes first.

Regular maintenance and prompt attention to minor issues can help prevent these common problems from arising. Always follow the manufacturer's recommended maintenance schedule to keep your Briggs & Stratton engine running smoothly. If you encounter any issues that you can't troubleshoot or repair yourself, don't hesitate to consult a professional technician. By staying proactive and vigilant, you can extend the lifespan of your engine and ensure optimal performance for years to come.