Generator Guide

How to Fix Generator That Won’t Start

Generators are a great way to have backup power in an emergency, but what do you do when your generator doesn’t start? In this article, I will show you some of the best ways to fix a generator that won’t start.

Table of Contents

Reasons Why is Generator Not Starting?

There are a few reasons why your generator might not be starting. The most common cause is that the engine isn’t getting enough fuel. Make sure you have plenty of fresh gas in the tank and clear fuel lines. If the problem persists, you may need to replace the fuel filter.

Another possible reason for a generator that won’t start is an issue with the spark plugs. Try cleaning or replacing the plugs and see if that gets the engine running. If not, there could be a more severe problem with the ignition system. You’ll need to consult a professional mechanic to diagnose and fix that issue.

Finally, make sure all the cables and connections are secure and tight. Loose wires can prevent electricity from flowing correctly and cause many problems. If everything looks okay there, you may have a faulty generator head or voltage regulator. These are both practical issues that will require replacement parts.

How to Fix Generator That Won’t Start

Here are the best ways you can fix a generator finding it hard to start. And if you have tried all these recommendations and still not starting, you should contact your generator mechanic to fix it for you.

1. Check the oil level and fuel supply

If your generator won’t start, the first thing you should check is the oil level and fuel supply. If the oil level is low, add oil as needed and check the fuel supply. If the fuel tank is empty, fill it up and try starting the generator again.

2. Check for loose or damaged connections

If your generator doesn’t start, you should check it for loose or damaged connections. Loose connections can cause problems, including preventing your generator from generating power.

If you find any loose or damaged connections, make sure to tighten or repair them as soon as possible. It should fix the problem and get your generator up and running again.

3. Check the spark plug

If your generator doesn’t start, you should check the spark plug. If the spark plug is fouled or damaged, it may be causing the problem. Clean or replace the spark plug and see if that fixes the issue.

4. Clean the carburettor

If your generator won’t start after trying other methods, another aspect you should check is the carburetor. If the carburetor is dirty, it can prevent the engine from starting or running correctly. 

To clean the carburettor, follow these steps:

1. Remove the air filter and spark plug.

2. Use a carburettor cleaner to clean the carburettor.

3. Reinstall the air filter and spark plug.

4. Start the generator and let it run for a few minutes to see if it works properly.

If cleaning the carburetor doesn’t fix the problem, you may need to replace it.

Also Read:

Reasons Generator is Emulating White Smoke

Top 3 Ways to Run a Generator in Rain

How to Ensure a Successful Backup Generator Installation: Complete Guide

How To Prevent This Problem In The Future

If your generator doesn’t start, there are a few things you can do to prevent this problem in the future after starting it. 

First, make sure you have plenty of fuel on hand. If you run out of fuel, your generator will be unable to generate power. Second, regularly maintain your generator. It includes changing the oil and spark plugs and checking the air filter. 

A well-maintained generator is less likely to have problems generating power.

Finally, please don’t wait until your generator is out of power before refueling or servicing it. By following these tips, you can help ensure that your generator can start and generate power when you need it.


If your generator is giving you trouble, don’t despair. There are a few things you can try to get it up and running again. First, check the fuel level and ensure enough gas is in the tank.

Next, you check the oil level and make sure it’s complete. If both of those things are fine, the problem is with the spark plugs. Clean them off and see if that does the trick. If not, you may need to take your generator to a repair shop for further diagnosis.

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By Abdulmajeed Abdulwasiu

Abdulmajeed Abdulwasiu is the founder of Generator Hacks, a writer, student, generator consultant and generator mechanic. He has 7 years of experience repairing generators, which he learned from his uncle, but naturally, he’s a writer. He loves reading, and writing and hence if he’s not repairing generators he’s writing.

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