10 Major Reasons Why Your Generator Won't Start

Having a generator that won't start is a notable problem, especially during power outages, need for backup energy, or change of location. The frustration of a generator not starting can be quite overwhelming, when it occurs at a critical time. However, in most cases there are simple reasons as to why the generator might not start. Here are 10 reasons why your generator won't start and how to check for them:

1. Fuel Level

The most common reason for a generator not starting is an empty fuel tank. If you cannot hear the engine trying to start when your try to start the generator, this is a good indication that you have run out of fuel. Check the fuel gauge and top-off the fuel if necessary. Make sure to keep enough fuel in the tank for best results when needed.

2. Low Oil Level

Missing or low oil is one of the most common issues associated with generators that won't start. If the oil level is below the requirements, the generator's engine will not be able to turn over, resulting in it not starting. Many generators have an oil sensor that will prevent the engine from starting if the oil level is too low. It is important to check the oil level regularly and make sure that enough is present to keep the engine lubricated.

3.Air Filter

A dirty air filter can prevent the generator's engine from starting. The filter is designed to remove impurities from the air that the engine needs in order to run, so when it is clogged, there is not enough air for the engine to function. Checking the air filter on the side of the generator and either cleaning or replacing it should solve this problem.

4. Battery

Generators that have an electric start system usually require a battery to power it. If the battery is dead, the engine will not be able to start, preventing the generator from operating. Check the starter battery for proper charge and make sure all cables are connected and not corroded.

5.Fuel Shutoff Valve

Most generators come with a fuel shutoff valve that can prevent gas from reaching the engine if it is in the off position. Having this fuel valve turned off won't allow the engine to receive the fuel it needs to start. Make sure the valve is set to open, otherwise the engine won't start.

6. Spark Plug

A bad or worn out spark plug can cause the generator to not start. The plug is responsible for creating the spark that ignites the air/fuel mixture, so if it is defective, it will not allow the engine to start. Removing the plug and inspecting it for damage and/or cleaning it should resolve the issue.

7. Too Much Load

Generators have a certain capacity or a limit as to the amount of load they can take. If the load is too much it can cause the generator to not start due to overloading. Make sure to reduce the load, including anything plugged into the generator, in order for the engine to operate properly and prevent overloading the engine.

8. Blockages or Faulty Components

Blocked fuel lines, clogged carburetor jets, and/or defective components are all potential issues that can cause a generator to not start. Check for any physical blockages in the fuel lines and bottom of the carburetor, as well as any physical damage to the components, and replace or clean as needed.

9. Water Pollution

Water can find its way into the fuel tank, which will cause the engine to not start due to contamination. Emptying the fuel tank and lines, and replacing the fuel with fresh, uncontaminated type, should solve the problem. 

10. Low Temperature

Generators are capable of starting in cold temperatures, but if the temperature is too low, it may cause the engine to not start. Make sure the generator is kept in a suitable environment and the temperature is warm enough for the engine to start. You can try using starting fluid and adjusting the choke to help in extremely cold conditions.

In conclusion, there are many different reasons that can cause a generator to not start, ranging from a simple empty fuel tank to complex component malfunctions. Checking for any of the aforementioned issues should allow you to determine why the generator will not start, and be able to address it accordingly. Regular maintenance and inspection, as well as proper operation and storage of the generator, can help reduce the likelihood of it not starting when you need it most.