Generac Generator Won't Start How to Fix Fast

In the event of a power loss, which frequently happens during the winter, a power generator could be your lifeline. At this point, we understand the criticality of this power backup equipment.

While there are a number of options on the market, Generac is the only company that has endured and has remained a pioneer in offering the highest-quality power generators. In terms of results, durability, efficiency, and cost-effectiveness, its backup power supplies are the best in their class. It makes sense that Generac generators have become known as one of the most reliable generator brands.

These are devices that are prone to malfunctioning at some time in their lifespan despite their robustness and capacity to operate in the harshest weather conditions. And many people ask why is my generator not producing power.

And although machines are designed to work, there could be a number of factors that lead to them conking down, so you must take the proper preventive measures to guarantee that they continue to function as effectively as possible.

The easiest way to prevent a generator from having trouble starting is to keep utilizing it frequently. This enables the machine’s mechanical components to keep running smoothly.

Generac generators are no different from other machines regarding wear and tear when not in operation. Here are some steps you may take to ensure that your Generac generator starts up again and runs as efficiently as possible.

Why won’t my generator start?

Low oil pressure

Any engine needs oil to function properly, and generator engines are no different. Oil is one of the most crucial parts. Your generator won’t start easily if the oil level drops below the acceptable level. To keep the generator functioning, you must replenish the oil.

You can also determine whether it’s time to replace the oil. The prevention of future hiccups can be achieved by routine oil changes. Check the location of your generator, as well. The low oil sensor could give an inaccurate result if it is placed on an uneven surface. Make sure it is installed on a flat surface.

Empty Fuel tank

This is a typical scenario, particularly in regard to power producers. Only a few areas employ generators as a daily backup power source.

Generators are typically only utilized whenever there is a power failure, which occurs occasionally. Therefore, there is a good probability that a generator will run out of fuel. Verify the gasoline level and top off the tank if necessary.

Empty Fuel tank

Choke is faulty

Another crucial element in the starting process of an engine is the choke. When starting the engine, it should be in the closed position, and it should only be turned on once the engine has warmed up. Depending on the manufacturer, the choke levers are placed at various locations in different generators.

Typically, the generator’s side air filter is directly above where the choke lever is located. It is included in the power management knob of several other generators. No matter where you have it, it needs to be turned off when you power the generator.

The fuel valve is blocked

If the generator won’t start even with the fuel tank full, there can be a problem with the fuel valve. The fuel will not reach the carburettor if the valve is closed or clogged, and the engine will not start.

When starting the generator, make certain that the fuel valve is open. There are two things you can do if the fuel valve is clogged. Make sure the vacuum relief valve has been opened if your generator has one.

The outlet hose should then be disconnected from the intake side. To ensure that the fuel can get to the carburettor, check to see if any of these lines are clogged and clear them.

Carburettor is obstructed

It almost seems like a cyclical procedure to fix a machine. Until you get to the root of the problem, you handle one problem at a time. If your generator still won’t start after you’ve made sure the fuel tank is clear, examine the carburettor. The carburettor may become clogged if your generator hasn’t been operated for a while without being drained.

Carburettor is obstructed

You can read our elaborated article on how to clean a generator.

After cleaning the carburettor and the carburettor drain, you must first turn off the fuel valve in order to fix it. You should use a carburettor cleaning frequently and use your generator at least once a month to prevent carburettor congestion. As a result, your machine will be in better health.

Generac Generator Repair

Replacement or repair of the spark plug is required

The spark plug accumulates a lot of carbon buildup over time, which could affect how well it functions. The engine won’t start if there is a spark plug problem. The residues can be removed by cleaning them with a little knife. By withdrawing the recoil starter and placing the spark plug near the engine when cleaning is complete, you may check the spark plug.

When the engine is clean, remove the recoil starter and hold the spark plug close to the engine’s crankcase to examine the spark plug. A spark plug tester can be used in addition. You are in good shape if the sparks appear solid and blue in hue.

Ensure that the spark plug wire is in a good position by taking a quick glance at it as well.

You need to inspect the ignition coil if the sparks aren’t powerful enough. Use an ignition coil tester to perform this. The ignition coil might need to be replaced if the issue persists.

Dead battery

If the equipment is not used for a while, the battery is known to deplete over time. Therefore, if your generator won’t start, you must assess the battery’s condition. You may need to change the battery if it is old. Jump-starting the battery will sometimes fix the problem. In this situation, you must make sure to regularly utilize your generator to prevent the battery from discharging.
Check and add fuel.

Old, stale fuel is among the most common causes of generator non-starts. If fuel has been kept in your Generac generator for more than 30 days without a fuel stabilizer or more than six months with a fuel stabilizer, a licensed repair dealer might need to clean the carburettor.

Dead battery

Always use brand-new unleaded fuel, please. Use only fuel with an octane rating of 87 or higher. Never use E85 fuel or a gasoline/oil blend intended for two-cycle engines.

After making sure your fuel is clean and your carburettor is clean, make sure you have enough fuel in your tank to start your generator—at least 1/4 of a tank.

Fuel valve location

The fuel valve should be turned on after you’ve checked the fuel level. The engine will run incorrectly and no fuel will be saved by partially closing the fuel valve. Make sure your fuel valve is fully on as a result.

Put Oil in

You should first confirm that your Generac generator is on level ground before checking the oil level. In doing so, the oil sensor will be able to assess whether there is sufficient oil to power the generator. Underneath the oil cap, the oil monitor is mounted. High or low oil levels are indicated by the letters “H” and “L” on it.

If your unit is low on oil, detach the oil cap and carefully refill it.

Turn On The Choke

Set the choke to half or off for a warm, recently used device. Set it to full choke, on the other hand, for a cold unit.

My Generac backup generator won’t start

Starting issues with Generac standby generators could exist. You must search for any similar causes, as they could be the same as with other Generac generators.

  • The spark plug could be defective and vulnerable to damage or wear.
  • Use a tool like a spark plug tester to check to see if the plug is defective.
  • There is a possibility that the generator’s carburettor may be blocked.
  • The carburettor may clog if fuel is left in the generator for an extended period of time.

My Generac propane generator Won’t start

  • Some Generac generators run on propane, and they could experience starting issues just like every other Generac generator.
  • You need to see whether there is fuel accessible because it might be one of the causes why the generator won’t start.
  • Following a fuel inspection, you must determine whether the intake manifold or filters and the exhaust system are in excellent shape.
  • The spark plug must be inspected first to determine whether it is in excellent condition.
  • If indeed the spark plug is in perfect working order, you should check the other sections of the generator.
  • The regulator needs to be checked to determine if it is functioning normally; if not, it needs to be fixed so the generator can start.

My Natural gas generator won’t turn on

There could be a few causes for your natural gas Generac generator to have starting issues.

  • The most frequent issue may be the fuel, and as the name implies, they run on natural gas.
  • Check to see if your natural gas supplier is keeping everything running; if so, it’s time to examine any additional problems that might be lurking elsewhere.
  • You’ll notice that it has two wires flowing from it down to the right. To ensure that the gas comes out, pull out the one that is on top.
  • If that doesn’t work, check to see if the spark plugs are producing a spark.
  • If everything is in order, there might be a problem shorting out the ignition coils.

Generac Generator Won’t Start – FAQs

How do I reset my Generac generator?
You should simply switch the generator to the “OFF” position because your Generac may not have an “ENTER” button on the controller, depending on its age and model. This will clear the fault or reset the controller.
Why did my Generac generator not kick on?
The fuel valve could malfunction even though the fuel tank is full and the generator still won’t start. The fuel cannot reach the carburettor and the engine won’t start if the valve is closed or obstructed.
How often should a Generac generator be serviced?
Generac advises having your appliance serviced by a licensed Generac service dealer every 6 to 12 months. Owners of home generators need a Generac maintenance kit because it’s crucial to adhere to an annual maintenance schedule. Your warranty may be voided if regular maintenance is not performed.
How often should a generic battery be replaced?
Non-negotiable: battery replacement every three years. The system’s battery is its most important component. When the power goes out, you have nothing to start the generator with if the battery is dead. Avoid waiting until it breaks before replacing it.
Is there a reset button on a generator?
Your generator’s control box houses the main on/off switch, main breakers, and reset breakers. Circuit surge protection is provided via reset breakers. These breakers require pushing in order to reset when your generator encounters a surge.
Where is the fuse on a Generac?
The transfer switch of commercial and residential liquid-cooled Generac generators typically houses this fuse.


Wrap up

Every machine needs routine maintenance to keep it running well. Any machine that is not utilized for an extended length of time will begin to show signs of wear and tear and will not operate to its full potential.

Due to their frequent erratic use, generators are more susceptible to such damage. To ensure that you don’t run into any problems in an emergency, it’s a good idea to turn it on once a month. In addition to extending the generator’s lifespan, doing so will save you money on pricey maintenance and replacement costs.

Try the aforementioned techniques, nevertheless, if your Generac Generator is having difficulties starting.

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