All your lights went black due to a power outage. Trying to turn on your power backup generator? Within a few seconds, the engine sputters and dies immediately! This feels not just frustrating, but the end of your precious moments, lovely get together, and everything else. If your portable or standby power generator does not work properly, you might be dealing with a generator low oil shutdown problem.
Standby and portable generators have a built-in safety mechanism that keeps your machinery safe from disastrous internal failures. However, it also serves to be a confusion source when you are trying to restore electricity in case of an emergency. In this guide, we explain how the system works. Why does your generator complain about a low oil shutdown problem? And a step by step troubleshooting guide by HuaQuan to bring your generator back to life quickly and safely?
What Is Generator Low Oil Shutdown?
Generator oil shutdown is an automatic safety system that engineers integrate into modern engine designs. It helps to immediately stop your generators from working if the oil drops below a specific standard safety level.
The engine’s internal combustion occurs at maximum speed. Ultimately, it generates extremely unbearable heat. Without proper maintenance and lubrication, the metal components like pistons, rings, and cylinder walls of your engine grind against each other.
Within a few seconds, the friction causes your engine to heat unnecessarily. The engine shuts down and is destroyed. You can say that the low oil shutdown feature is itself a safety option that saves you thousands of dollars in avoiding permanent engine damage.
How Generator Low Oil Shutdown Works
When you know how the mechanics work behind the generator system, it becomes easier to troubleshoot the problem on the spot. The low oil shutdown switch works similarly to the ATS. The sensors are located inside or outside the engine crankcase.
- Float Switch Mechanism: In portable generators, there is a physical float in the oil reservoir. Once the oil level drops, the float lowers. Whenever it hits the bottom level, the ground circuit instantly shorts, killing your generator’s spark plug.
- Pressure Sensor Mechanism: For large industrial and standby generators, engineers install an oil pressure sensor. Instead of managing the oil volume from time to time, it’s better to keep an eye on the pressure your oil pump creates. If the pressure drops too low, the sensor sends a signal to your control board that further shuts off the fuel supply to the generator.
- Automatic Engine Cutoff: No matter what sensor you prefer, the result is always quick and immediate. Once the standard level is breached, the generator automatically shuts down to save your engine from permanent damage.
Common Causes of Generator Low Oil Shutdown
Now comes the question: what if your generator keeps triggering this safety feature? Might be, here the power backup system is struggling with:
Low Oil Level
Generally, low oil levels are the reason your generator shuts down. Modern engines consume small amounts of oil during electricity production. If you are running your power generator for days without checking the dipstick, it might be that the fuel level has hit the bottom threshold.
Faulty Oil Sensor
Sometimes, the oil level is simply perfect. But the low oil sensor generator component is no longer working. Sensors, without proper maintenance, get coated in metallic sludge. Or due to frayed wiring, they usually send a false positive signal to your generator’s ignition system.
Dirty or Old Oil
Whatever fuel you use, it degrades over time. When the oil loses its viscosity and turns into a thick, gritty sludge, the float sensor sticks. Or the oil pumps are unable to build the maximum pressure necessary for triggering the generator shutdown.
Oil Leaks
Degraded crankcase gaskets, loose drain plugs, and cracked engines are also reasons for your oil leakage. Have you ever noticed a dark puddle around your generator? Maybe there is a possible leak that drains your fuel reservoir constantly.
Generator on Uneven Surface
Always put your generator on a flat ground level. If you have installed your power backup generators on a hill or there is uneven debris all around the system, the oil inside the crank case slopes to one side. Resultantly, the sensor becomes dry, tricking the system into thinking your oil level is low even when the tank has the maximum fuel necessary for proper working.
Signs Your Generator Shut Down Due to Low Oil
If you are new to handling power backup generators on your own, how would you know if there is an oil issue or something else wrong inside the machine? Keep an eye on these necessary signs:
- Generator stops after a few seconds: If your generator engine fires only for 3 to 10 seconds and then suddenly dies, the generator’s low oil sensor is cutting the spark.
- Warning lights or alarms: Manufacturers recommend modern inverters and standby generators with a red LCD oil can Icon on the control panel. This icon flashes before or immediately after your system shuts down.
- Engine won’t start: If the oil level is critically low, the generator will never run or not turn over at all. Signaling towards the sensor grounds your generator’s ignition.
- Reduced performance before shutdown: Sometimes, people complain of loud metallic clattering noises seconds before their generator crashes down.
How to Fix Generator Low Oil Shutdown (Step-by-Step)
Is your generator not turning on at all? Follow these safe, quick tips to troubleshoot and fix the issue on the spot.
Step 1 — Check Oil Level
With some help, move your generator to a completely smooth surface. Take out the oil dipstick and wipe it off. Now, reinsert it without threading. Follow your manufacturer’s instructions to check your oil level again.
Step 2 — Add Recommended Oil
If you insert the dipstick and see the oil level below the safe zone, carefully add your manufacturer’s recommended oil to the funnel. It’s better to use 10W to 30W in summers and 5W to 30W in the winter season. Never overfill your oil tankers, as too much oil will ultimately blow your engine seal.
Step 3 — Reset the Generator
Have you filled the oil inside the tank? Wait for a minute so it settles in the crank case and moves around the sensor. Turn your generator’s main switch off. You wait for at least 30 seconds to clear the fault code. Then restart your engine.
Step 4 — Inspect Oil Sensor
The generator oil tank is full, but your generator is still showing low oil symptoms. Maybe the sensor is faulty or stuck. Use a single yellow or black wire to locate the center point at the bottom of your engine block. Cross-check for any loose connections or stripped insulation.
Step 5 — Check for Oil Leaks
Double-check the drain plugs and oil filters. Tighten the loose bolts. If the generator gasket is blown away, immediately call the nearest professional technician to fix it ASAP.
How to Bypass Low Oil Shutdown (Emergency Use Only)
SAFETY WARNING: Sometimes, people are lazy enough to ignore the low oil sensor warnings. If your generator engine runs out of oil, it will permanently jam, destroying the engine. It’s better to save this condition for only life or death emergencies or temporarily to test if the sensor is broken or not.
Temporary Bypass Method: Find out the wire coming from your low oil sensor on the engine block tank. This wire connects the ignition coil circuit to a simple bullet connector. Unplug the wire to cut down the ground circuit, completely bypassing the sensor circuit.
- When it’s safe: Engineers recommend only testing if a faulty sensor is keeping a full fuel engine from starting.
- Risks: When unchecked, it brings a catastrophic engine crash. Once you test the sensor, immediately reconnect the wire.
How to Prevent Low Oil Shutdown in Generators
As you have heard, prevention is always better than a cure. Habitually followed these tips and tricks to keep my generator running smoothly for four years.
- Regular oil checks: Always check the dipstick before starting your generator. Make sure to keep an eye on the dipstick every 12 hours during continuous, multi-day generator operation.
- Oil change schedule: Brand new generators, change the oil after every 20 hours or 100 hours (about 8 days) of use thereafter.
- Proper storage: Has your stored oil surpassed the one year limit? Drain it to avoid sludge buildup around the float sensor.
- Using correct oil type: It’s better to use high quality, synthetic oil that perfectly suits your local climate temperature for maximum flow and proper oil pressure.
Generator Low Oil Shutdown Reset Guide (Brand-Specific)
Although with quick steps, you can fix the generator’s low oil shutdown. Different brands have different reset protocols. So, follow your manufacturer’s recommended guidelines to reset the safety protocol.
- Honda Generators: Honda generators are highly sensitive. Always level your oil to the recommended guideline. Once it tops off the upper thread limit, turn the dial off. Now, restart the generator.
- Generac Generators: In Generac generators, you must go for a hard reset option. Turn off the control panel. Now disconnect the battery for at least 10 seconds. Reconnect and check the fuel level. Now, switch to the auto option and run the generator.
- Champion Generators: Across the market, Champion generators are known for a flashing red low oil light icon. Once your oil level reaches 10W to 30, wait for two minutes. Once the oil unsticks the float, boil your generator to recoil the starter.
- Predator Generators: Predator generators are prone to shutting down on uneven ground levels. Move your power backup system to a flat, concrete ground. Fill your oil unit until it spills out of the fill hole. And then restart the engine.
When to Call a Professional
Have you filled the oil tank? Tried placing your generator on flat ground and checked all the basic buildings. Still, the generator does not turn on. It’s time to call a certified technician. Experts help in:
- Long term shutdown issues despite a full crankcase.
- When the engine complains of loud knocking, or you see heavy blue exhaust smoke, or blown gaskets.
- For electrical sensor failure, the professionals repair the engine block and replace the internal float.
FAQs
Why does my power backup generator shut off even with full oil?
The generator is either placed on an uneven surface or the low oil sensor is faulty. This low oil sensor sends a false ground signal to turn down the ignition coil, so the generator won’t start.
Can I run a generator without an oil sensor?
Yes. Mechanically, you can run your engine by unplugging the sensor wire. However, experts do not recommend doing so as it is your engine’s primary safety mechanism. In case of any actual leak or oil burn off, your engine will ultimately seize down permanently.
Is the low oil shutdown mechanism automatic?
Yes. Once your oil level reaches below the manufacturer’s safety threshold level or the pressure drops, the sensors automatically ground the ignition or shut off your fuel supply. And, the engine instantly stops to prevent further damage.
Final Verdict!
The standby and portable generator’s low oil shutdown feature is a blessing in disguise for people out there. It protects your engine from permanent damage. But when it stops unnecessarily, this becomes frustrating. With proper knowledge about how it works and following the quick tips and tricks mentioned in this guide, you can immediately diagnose the issue and keep your generator running smoothly for years.
Are you looking for a reliable power upgrade for your facility? Contact the HuaQuan team today. Say goodbye to all unreliable backup power plants and consistent power shutdowns. Contact our team today for a free quote on premium, heavy duty power backup generators to keep your lights on 24/7.
