My Generator Stalls under Load:How to Fix

My Generator Stalls under Load

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My Generator Stalls under Load

Your Generator is stalling because of a clogged carburetor, this happens when fuel is left for a long time. These oil ingredients may have evaporated, leaving sticker and thicker substance which then clogs the engine from starting.

Here are some steps to take when your generator stalls under load:

  1. Check the voltage output of your generator’s plug on your extension cord or power strip.
  1. If it’s low, check if you have switched off everything connected to the circuit and whether the circuit breaker has popped out on your electrical panel.

It would be best if you also double-checked that nothing inside or outside your house is still using electricity.

Such as a pool pump or an oven with its door open instead of turning off.

This will not be possible for larger loads like air conditioners but can apply to smaller items like hairdryers and vacuum cleaners.

Switch them all off before trying to start up your backup generator again.

Remember, you can always use appliances plugged into one power strip if it’s not their dedicated circuit.

  1. Check your generator for low oil levels by removing the dipstick and wiping it clean with a paper towel.

Reinsert it wholly. If there is no oil or if the level is near minimum, add some more through the fill spout located under your generator’s hood on its side.

  1. Make sure that all your generator’s controls are well set.
  2. Depending on how much power you need, your generator may have multiple voltage output settings to choose from (see step 5).

The most common voltages are 120 volts for lighting and small appliances like computers;

240 volts for larger appliances like ovens and AC units, and 480 volts AC for large-scale outdoor equipment like air conditioners or electric pumps on pools.

  1. Turn all on/off controls on your generator’s pressure switch to the on (away from you).

If it has multiple switches, make sure nothing is off or on next to its position; only turn the one labeled on/off.

Next, set the throttle knob — usually found on top of generators right above their control panel — to full throttle.

This knob regulates how much fuel enters the engine and thus determines the amount of power output by your backup generator.

  1. Check that your external circuit breaker is in its ‘on’ setting, not it’s ‘off’ setting (which means it’s sending electricity through, but no electricity is coming back).

Again, if there are multiple switches, make sure none are off, only to the “on” setting.

In addition, ensure you have plugged in your generator’s power cord into a working wall outlet.

  1. Release the parking brake on your backup generator by pressing its lever down and away from you with your foot or hand, depending on where it’s located.

This will allow the engine to start up automatically when running a larger load through your external circuit breaker.

  1. If you meet all the above steps, and it still doesn’t start up as it should after 10-15 seconds of trying, consult a professional as soon as possible.

There may be larger issues with your generator that need repair or service for smooth repair operation in the future.

A generator is a portable machine that uses gasoline or diesel to produce electricity. They are often used in the event of emergencies, such as natural disasters.

You can also use generators for recreational purposes like tailgating before games and camping trips.

What Does 50% Load Mean On A Generator?

First, let’s talk about what a 50% load is on a generator. A 50% load is when you use half of the maximum power output that your generator can produce.

The other key term here is “maximum power output,”

Which refers to the wattage that your generator produces at total capacity before it automatically shuts off due to in-built overload protection features.

For example, if you have an 1800 watt rated unit, 1200 watts would be its maximum power output (1800 – 1200).

Of course, you don’t want to run your generator(Amazon Link) at total capacity all the time. After all, that’s not very cost-effective in terms of efficiently running it.

Instead, you’ll likely concern yourself with what load to set your generator at to avoid your unit shutting off due to overload protection features built into it.

Thus, most generators are well equipped with a way for you to determine what percentage of its maximum power output it’s generating right now.

To do this on one of our 1800-watt generators, you would look for an area on the machine labeled “Load Percentage” or “Load Meter.”

This will show how much power the generator is currently delivering in terms of the maximum power output that it is capable of.

So, what does 50% load on a generator mean? If you divide your maximum power output by 2 and then multiply that number by 100.

This will give you the percentage of the total power output that the generator calculates for its most efficient operation.

So in our example above, I had an 1800 watt rated unit with a 50% load which would yield an actual running load on the generator of 900 watts (1800 x 0.5 = 900).

This means that if you drew over 900 watts from your generator while it was at 50%, it would automatically shut off due to in-built overload protection features.

Now keep in mind that your “maximum power output” changes when your frequency dips below 60 Hz.

This is because the generator will automatically step down its output and operate less efficiently (whereas if it was running at a higher frequency.

It would hit its maximum power output every time).

So when you see other generators that can produce over 1800 watts but only have a 50% load capacity of 1200 watts.

This means that you can’t run your unit at total capacity even though it’s capable because it will shut off due to in-built overload protection features.

If you’re not sure how much wattage you’ll need for an upcoming event, then try estimating based on half the amount of people in attendance.

For example, if you expect 100 people at an event, most generators with a 50% load capacity of 1800 watts will do the trick.

If you’re looking for something with a higher load capacity, then check out our 4000-watt generator instead.

Also, keep in mind that your maximum power output changes to units below 1200 watts if they are not equipped with voltage regulation.

If you need more information on generator basics or are unsure about what you’ll need, please contact us.

Why Does My Generator Sputter?

Your generator sputters because it needs a tune-up. Lack of proper tuning means that the carburetor cannot atomize the fuel completely.

Which results in less power – or worse, stuttering. Believe it or not, it’s better to turn up an older diesel engine than gasoline engines are.

You can still have it professionally tuned to get the most out of your generator without breaking the bank.

Here are some things you can do before taking it to a shop:

Check for worn spark plugs by removing them and feeling their electrodes. If they’re pitted, replace them.

If they’re okay, take off the air filter cover and check for debris on top of them.

– Clean if necessary with compressed air or an air compressor nozzle (don’t remove any parts, blow off the dirt).

Remove the carburetor bowl and clean it, finding any hairline fractures. Also, check the throttle lever.

If it’s bent or not returning wholly, bend it back, so there’s a spring in its motion.

Now that you’ve tweaked the small stuff, here are some general tips for generators:

Adjust idle speed screw on generator engine to at least 1/2 inch of mercury (1-3 psi) of vacuum as measured with a manometer.

Take care to fix any fuel leaks by tightening bolts or replacing gaskets.

Check oil level and top up as necessary gently rev up your engine a few times before shutting down after use.

This should work fine for most people’s needs but get in touch with us if you’ve more specific concerns.

The generator is one of the most valuable tools around. You can use it for emergencies like during storms or keep your house’s electricity on when there is a blackout.

But not all generators are equal – some use gasoline while others run on diesel fuel.

If you’re thinking of buying a diesel-powered generator(Amazon Link) you’ll need to know how it works and what you need to do to ensure that it’s working well.

Why Does My Generator Keep Shutting Off?

Top five reasons generators turn off and how you can avoid them.

1) Voltage Drop: Generators need a specific voltage for them to continue running.

When the voltage drops below that requirement, the generator will shut down until power returns or voltage levels restore by adjusting settings on your electrical panel.

2) Low Fuel Level: It sounds obvious, but many people forget about their fuel supply when powering their homes with a generator during an outage.

If you run out of fuel while using your backup power system, it won’t matter if everything else is going according to plan – your generator will shut off.

3) Overloading: This is not as common as the first two, but if your home’s electrical system can’t handle the continuous use of a generator;

And how much power it is drawing (assuming you’re running everything at once. Even things like electric heaters and stoves).

Your house won’t have enough for internal usage which could also cause problems with generators shutting down or working now and then.

4) Dirty Air Filter: If the air filter on your generator gets dirty, it will gather dust and other debris.

The more this happens, the less efficient the flame in the combustion chamber gets, making your generator work harder than it needs to.

This can create excessive strain and eventually cause shutdowns because of overheating.

5) Mechanical Failure: Your generator isn’t foolproof.

If it’s not working well or has broken down, there is no reason to expect it to start up and run like normal.

Even if you’ve got the settings on your electrical panel working right for your home.

If you’re having trouble with your generator turning off after it starts, don’t waste time trying to figure out why – call the experts.

How Do You Fix An Overloaded Generator?

You can fix an overloaded generator by using a programmable logic controller (PLC).

This will automatically watch the current coming from the generator and turn off the generator when it goes overloaded.

This function will save the generators and your electricity bill since you are not charging anything into them.

My Generator Stalls under Load

The basic idea of any electric energy distribution is that you have some power provided at residences or factories.

Where things may need power for varying amounts of time each day/week/month/year, depending on what they are using this power for.

You have generators that provide this power all day long, but there are periods where this power is too much for the buildings to take.

If you miss these periods, your electric bill will go through the roof because you will charge your appliances into huge generator capacities;

Or into an overloaded grid system that has no choice but to provide all that it can into your building.

Your average PLCs (Programmable Logic Controllers) comprise inputs and outputs, like any computer-based device.

The input would be the power coming through from whatever applies (generators or main grids at fault).

If the current calculated by the PLC is above a certain threshold, then it will automatically turn off whatever output devices (breaker switches to stop generators, etc.)

It takes some time for these systems to work their magic, so be aware of this if you have a real-time system.


When you feel your generator is struggling to produce the power necessary for all your load, it may be time to look at what’s going on.

You can even hire a professional to do an inspection for you. I hope this information boasts ample help to you.


Hi! I' am Tyron. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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