What to do if your Onan generator starts then shuts down?

If there is no AC, proceed to check the field flash voltage through the field flash pin of the board. In the case field flash voltage is not present, the control board may be defective. If that happens to be the case, the “Onan generator starts then shuts down” issue could be taken care of by replacing the unit control board.

Why does the oil pressure switch on Onan generator stick open?

The oil pressure switch of Onan generator often sticks open in case the unit has not seen any use for an extended period of time. In many cases, the situation could be resolved by multiple start/stop cycles, some light tappings should work as well. 2. Defective Control Board

Why is my Onan generator producing low AC voltage?

If field flash voltage seems pretty normal, the regulator could be the source of problem which you could determine simply by running 12 volts through a diode to the regulator pin 9. In the case the generator starts producing normal or slightly low AC voltages after that, the regulator is definitely defective.

What should the resistance be on an Onan generator?

Use the multimeter to check the resistance between pins 9 and 10 of the plug, the appropriate reading would be around 22 – 28 Ohms. If the reading is too low, there could be a short in the rotor. On the other hand, if reading is too high, it’s highly likely that there is a ground in the rotor .

What happens when you turn off the genset?

This is what happens when you stop your genset. Pressing and holding the stop switch for a few seconds causes the control board to cut off the 12 volts to the ignition and fuel pump (and/or fuel solenoid valve) causing the engine to stop. On models equipped with magneto ignition, the control board grounds the magneto kill circuit.

Can a 7000 watt Onan generator run a RV?

The 7000 watt Onan RV generators may seem like they can run everything in the RV, but you can cause it to trip safeties if you try to do too much. The over voltage protections in particular tend to engage when you walk into the RV and turn everything on. Tip 10. Service varies.

How long is the warranty on an Onan generator?

Onan warranties depend on the application. For example, it is common to see a three year or 2000 hour warranty on an Onan generator. If you’re running it nearly all day every day, that means you’ve blown through the warranty in a year. Another issue is the application.

What are the safety features of an Onan generator?

Pay attention to safety features. Onan generators have a number of built-in safety features. One of these is the fuel cut-off switch so you don’t use all your gas running power though it would leave you stranded on the side of the road. Another is the low oil cut-off. If the generator is cutting off, check the oil levels.

Is there a problem with my Onan microlite generator?

We have a Onan 4000 microlite generator that only clicks but won’t turn over. Replaced the solenoid, the starter is not Small Engine Troubleshooting Problems?

Why does my Onan RV generator not start?

The Onan RV generators are the best power producers and known to deliver quality. Sometimes, there may be a case that Onan generator won’t start, and the common causes for the same are listed above. If you do not manage to detect the problem, do not worry, as getting expert help is never too late.

What do I need to start my Onan generator?

Getting the Engine Running Before any evaluation of the controls, regulator or generator can proceed, the Onan engine must have oil and fuel, be in running condition and the 12-volt battery charged. The electronic governor, 151-0752, on Models BGM and NHM, Spec B and later, must be functioning properly.

We have a Onan 4000 microlite generator that only clicks but won’t turn over. Replaced the solenoid, the starter is not Small Engine Troubleshooting Problems?

What does it mean when your generator won’t start?

Thankfully, a non-starting generator is usually a minor setback rather than an indication of a more serious problem with the machine. The best place to start with troubleshooting your generator is with some of the most common causes of starting issues.

How often should a Cummins Onan generator be run?

It’s very important to exercise a Cummins Onan generator regularly, because generators that sit unused have more problems. Cummins Onan owners manuals state that the generator should be run at least two hours every month if use is infrequent.

What kind of engine does a Cummins Onan QD have?

Depending on the year and model, a Cummins Onan QD generator may be equipped with either an Isuzu or a Kubota water-cooled diesel engine, which are among the most reliable in the industry. The engine is directly coupled to the generator, unlike belt-driven units found in many gasoline-powered generators.

What should I do if my generator fails to start?

Hold the operation switch at the “Stop” position and continue holding it. In some cases, you may be able to hear the generator’s electric fuel pump run, but, regardless, the red pilot light will illuminate. Release the operation switch after 30 seconds; the fuel system should be primed. If the generator fails to start, repeat this procedure.

What do I need to change the oil in my Generator?

Refer to the operators manual for the specific requirements of your generator model. To change the oil and oil filter, a 7/8-inch socket and ratchet, a drain pan, and an oil filter wrench are needed. A pair of rubber gloves and some rags or disposable shop towels also come in handy.

Is the Onan 2800 generator running at all?

Last month my Onan 2800 ran perfectly, today I can’t get it to run at all. Here are the details: (1) Pushing in on the remote start/stop button inside the Roadtrek and also at the access cover at the generator get the same results. (2) I checked the oil and it is with the recommended level.

How does a stand alone diesel generator work?

A stand-alone diesel generator also gets its fuel from its own fuel tank. The fuel is fed via a fuel injection system directly into the cylinder of the motor, and mixed with oxygen there. Then the piston moves to compress the diesel fuel to the pressure necessary for it to explode.

Who is Don and how does a generator work?

Don is a retired engineer and long-time motorhome owner who enjoys helping readers deal with the increasingly complex technology of RVs. I had a guy ask me one day; “OK, I am not in the least a technical person, so how does a generator work?

Where is the armature coil on an Onan generator?

One way to make sure it is the armature coil is if your generator needs time to cool down before starting up again. Usually, you may not be able to re-start the unit until 30 minutes have passed by. The armature coil is normally located next to the flywheel making it not to difficult to find and replace.

What’s the problem with the Onan Cummins Generator?

Onan cummins microquiet generator has a hidden defective part. If your onan generator runs fine then stops, this is likely the free simple fix. It’s incredible how the fix is this simple. Loading…

What does code 12 over voltage on Onan mean?

Code 12 – Over Voltage This problem comes from a faulty inverter and that part is overcharging the generator. The only way to solve this Fault Code problem is to take the generator to a qualified Onan dealer or repair shop. Alternative sources for this code may be a lack of fuel or a clogged filter problem.

How to check for Nan code on Onan generator?

All you have to do is follow these simple steps and you should be fine: Locate the primer button. This doubles as the start and stop button on your generator Run the generator for 15 minutes to see if the code has been cleared. If not, then you may need the help of a qualified nan repairman to fix the problem

What happens if you blink on Onan generator?

If you blink you may miss it. That may be a bad pun, but it is the truth when it comes to Onan generators. When something goes wrong, the generator will send out a code to tell you the problem. If you blink, you may miss the number of the error code.

Is the Onan code 32 good or bad?

3600 Onan code 32. But have good battery voltage. Fresh I have a emerald plus onan nhe 6.3 that has the dreaded dying after start is released. I need help figuring out if it’s the board or something bigger. … read more

What kind of regulator is on Onan generator?

It’s possibly the voltage regulator, the brushes, or the rotor-stator assembly. The regulator is in the $250 range for parts (google ‘Flight Systems’). It’s a doable but dang fiddly DIY repair. There’s a hidden Torx screw that’s an utter bear to restart, with no lead-in to the hole and no tabs to locate the regulator.

Why does an Onan generator have a wound resister?

Some of the older units had a wire wound resister in the start circuit. The idea was that when pushing the start button it gave full voltage to the circuit to make starting easier. When the button is released the resister would cut the voltage back somewhat to reduce wear. If the resister burns out the circuit goes open when the button is released.

What’s the problem with my Onan 5500 RV?

The problem is the Onan starts up and runs for about 10 minutes then shuts down. It will not restart immediately when I try. Just cranks and cranks and eventually I give up. Then I wait about 30 minutes and the gen will start and run for 10-15 minutes and then shut off again. Anyone have this problem? Any ideas?

Why does my Onan generator shut down soon after it starts?

But gas issues may not be the only reason why your Onan generator shuts down soon after it starts. You could be having an electrical or carb issue. If it is the carb, then you should have some sputtering before it dies.

What should I wear if my Onan generator won’t run?

About the gears, a rugged pair of rubber gloves should be sufficient but to be in the safe side, wear facemask and goggles as well. Once you have everything on hand, it’s time to tackle the “Onan generator starts but won’t stay running” issue.

When did my Onan Marquis gold shut down?

I have a 2006 Weekend Warrior with a 5500 Onan Marquis Gold with 950 hours on it. I purchased the toy hauler used in 2009 and the generator did not run at all so I replaced the plugs, filters and then ultimately the entire carb. It has been running smoothly until now.

How to adjust the governor on an Onan engine?

As you tighten the nut, the engine speed should increase, and conversely, as you loosen the nut, the speed should decrease. Adjust this nut until your engine is at the desired speed. Reduce the load, and allow the engine to idle for about 30 seconds, then put the engine under a full load.

Why does my Onan generator not start up?

Check the fuel levels. If your Onan generator isn’t running, it may be because fuel levels are too low. While some RV generators will run until the fuel tank has nothing but fumes, the Onan models tend to stop working when you’re down to a quarter tank. The units that do this are the ones drawing from the gas tank.

Why does the Onan 4K generator not have an oil filter?

For example, the Onan 4K generator doesn’t have an oil filter. On the other hand, you have to use the right oil and never use old oil to keep the generator from clogging up. Know the right level of oil, because over-filling will cause the generator to shut off just as too much would.

Why does my Onan microlite 4K stop running?

Had the same issue with our Onan Microlite 4K. Turned out to be the fuel pump. Ours is gas fuel and has a “prime” function on the start button at the generator. If your has the same, try pressing prime after the gen shuts off and listen for a pulsing sound from the pump.

When does the Onan generator shut down code 36?

Onan Generator Code 36 Generator Runs For a Few Minutes Then Stops Onan Generator Stops Running When Hot Diagnosing Different Onan Generator Issues Error Code 36 Advice Some Final Words It is possible for your Onan generator to start up fast and quit just as quickly.

Why does my Onan generator start and quit fast?

It is possible for your Onan generator to start up fast and quit just as quickly. That is because many generator models are designed to shut down if there is a quarter of a tank of fuel left in the tank.

What causes a generator to shut down after a few seconds?

With low oil levels, you can start your generator but after a few seconds, the temperature of the oil rises too quickly and it causes the system to shut down. When the oil level is too high, it also causes the sensor to force a shutdown. Mostly generators with low oil level auto shut-down feature turn your generator off.

What should I do if my generator keeps running?

If the generator goes on running at a high temperature, the sensitive parts of the engine, control panel, and voltage meters can break down. Solution: keep the water in the radiator filled. Make it a habit to check the water level in the radiator after a month. You can also use a coolant along the water to get better results.

Why does my generator run for a few seconds then stops?

Low Fuel – Sometimes a very minor problem like less fuel in the fuel tank can also cause your generator to run for a few seconds and then stop. The generator may have enough fuel to get started a couple of times or run without the loads but when you out the loads, it stops.

Why does my Onan diesel generator shut down?

I have a 7500 Onan diesel generator that runs for a minute and shuts down with a high coolant temperature fault code, but the coolant level is good and nothing feels hot, just warm. I went ahead and changed the fuel filter and air filter hoping for an easy fix but the same problem exists.

Why does my Onan generator keep flashing code 36?

Code 36 seems to be the catch-all error code and you cannot assume you have the right fix for every time the code flashes. Sometimes, the control module does not see the correct voltage for both legs of the generator. When this happens, it still sends out a code 36.

When to take Onan generator to certified Onan dealer?

When you confirm the 31 code, you need to take the generator to the certified Onan dealer to get it fixed Code 32 – Low Cranking Speed This code informs you that your cranking speed is below 180 rpms for 2 seconds.

What is the Code 48 Onan generator controller?

Code 48 – Generator Field Sense Once again, the controller is unable to sense a vital part of your generator’s operating system. This time it is the field voltage that escapes its attention. See your authorized Onan dealer to fix this problem.

Why does my Onan 4000 generator stop working?

My Onan 4000 generator starts, but dies after I release the start button. Acts like it is fuel starved. Any easy fix? My Onan 4000 generator starts, but dies after I release the start button. Acts like it is fuel starved. Any easy fix? – Answered by a verified Technician We use cookies to give you the best possible experience on our website.

What happens when you release the start button on Onan?

5k onan gen set starts and runs fine [sometimes] then it 5k onan gen set starts and runs fine [sometimes] then it starts and runs as long as you press stsrt button when you release button you loose spark and engine dies .new board and fuel pump … read more Hank F.

How does the Onan microlite 4000 RV generator work?

Onan Microlite 4000 rv generator runs while start button is Onan Microlite 4000 rv generator runs while start button is depressed but stops when the start switch is released. I have 1/2+ tank of fuel. read more Hank F. Technician High School or GED 16,763 satisfied customers I have a I have a 4KYFA26100K Onan generator. It will run

What happens when you start a generator in an RV?

This is what normally happens when you start your genset. Pressing and holding the start switch causes the control board to send 12 volts to the ignition, fuel pump, choke heater, start solenoid and field flash circuits. The engine then cranks and starts. Oil pressure and generator voltage build up within 1-2 seconds.

What happens when the generator is first started?

When the generator is first started, the regulator receives the field flash voltage from the control board and applies it to the generator field (rotor) to initiate AC voltage buildup in the stator.

What is the serial number on Cummins Onan generator?

If you cannot read the nameplate, the serial number is stamped onto the block of the generator. It is 10 characters, composed of both letters and digits. Call the Cummins Onan Customer Response Center at 1-800-888-6626. Why does generator keep shutting off?

What do you need to know about the Onan generator?

The Onan power generator is a solid machine specifically designed to meet the energy demands of the average house owners as well as RV enthusiasts. If you want something to sustain your RV facilities/appliances or simply in need of a backup power source, this unit shall serve you well.

When does an Onan RV generator stop working?

While some RV generators will run until the fuel tank has nothing but fumes, the Onan models tend to stop working when you’re down to a quarter tank. The units that do this are the ones drawing from the gas tank.

What’s the noise limit for an Onan generator?

Nearly all Onan generators also meet the National Park Service sound level requirement. That is 60 decibels of noise or less at a distance of fifty feet. These rules may allow you to run your generator later at night in RV parks with noise limits, too, but you should know their rules rather than assuming you’re already compliant. Tip 12.

When does the generator shut off in an RV?

The generator in my RV shuts off after running for approximately 25 mins, with or without a load. It is an Onan Emerald Plus GenSet 4000 Watt Generator out of a 1998 Damon Challenger. Gas tank is full.

How to read Onan generator fault code Code 58?

Code 58 – Exhaust Gas Temperature Shutdown What causes this error code is a lean fuel supply, restricted exhaust system, bad ignition system, bad heat sensor, and other issues. To keep your warranty valid, you need to take your generator to your Onan dealer for diagnosis and repair. Code 81 – Exhaust Gas Temperature Sensor Open

What do you need to know about an Onan generator?

Before any evaluation of the controls, regulator or generator can proceed, the Onan engine must have oil and fuel, be in running condition and the 12-volt battery charged. The electronic governor, 151-0752, on Models BGM and NHM, Spec B and later, must be functioning properly.

How to quiet down the Onan 2500 microlite propane generator?

In my search to quiet down the Onan 2500 Microlite propane generator, I decided to install an Onan Resonator (Part# 155-2449) which was recommended by couple of RV.net members . To start, first determine the placement of the resonator.

How to tell if Onan generator is going faster than 3, 400 rpm?

3 flashes, a pause and then one flash tells you that your Onan generator is going faster than 3,400 rpm. The trick here is to make sure you do not confuse 13 with 31. You can double-check by pressing the stop button 3 times in 5 seconds.

Where do I Find my Onan model number?

Genuine Onan re- placement parts are recommended for best results. When contacting Onan for parts, service or product information, be ready to provide the model number and the serial number, both of which appear on the genset nameplate (Figure 1-1). Each character of these numbers is significant (Figures 1-2 and 1-3 on Page 1-2).

What to do when your Onan generator shuts down?

The wood absorbs the heat and should help clear the fuel line. Once the line is cleared re-attach the fuel line and start your generator. Another issue may be the fuel pump itself. If you can, insulating it may help prevent vapor lock and other fuel delivery issues.

Why is my Onan generator giving me an error code?

It also means that an oil leak in the generator can kill it well before the unit suffers damage. If the safety feature trips and the generator is giving you an error code, look it up before assuming that resetting the generator is all you need to do.