Onan generator rattle. It starts and runs fine otherwise. Runs two or three rooftop air conditioners with power to spare. Mar 3, 2024 · We didn't have a generator as I sold it, an Onan, when I built the large lithium battery system for our van. This is how you read a Fault Code. Learn about key features of Onan generators, understand their operation, and discover effective maintenance tips. 5 MDJE loud rattle/high oil pressure You sure your raw water pump is pumping? it almost sounds like an exhaust type noise which with that aqualift muffler might get noisy if water isn't being fed into the exhaust. It seems like it runs a bit better but still makes a weird noise when the air conditioner is on. I've made two videos showing the difference. Not the OEM genset. Jul 18, 2014 · A few have mentioned rattling or vibration in the generator compartment so I thought I would pass along the fix that Entegra did on mine. Gas-powered unit owners should check the Onan generator troubleshooting manual. The motor has a horrible rattle when it starts and the rattle deters it from running at start up. 5 MKMD. Is it the coil? Buy Cummins Onan A055E840 Direct. Our records indicate that some of these generators were shipped to you. However, there may be times when your Onan generator cranks but won’t start. Mar 19, 2016 · My 8kw Onan Diesel generator has been working fine, when I push the pre-heat switch it goes "tickety-tickety" and after about 15 seconds fires right up. Oct 28, 2024 · Learn how to reset Onan generator easily with our step-by-step guide for reliable performance and smooth operation. INTRODUCTION The G-MAN is designed with the RV generator service technician in mind. Powered by vBulletin® Version 3. Q: How can I diagnose fault code 33 on my Onan generator? A: To diagnose fault code 33, inspect the connectors, examine the wiring, test the control board, and verify the load on your Onan generator. Jan 21, 2025 · Is your Onan generator running but not producing power? This article dives into common causes for this frustrating problem and provides practical troubleshooting tips to get your generator back on track. 20 Feb 7, 2025 · My Onan 4000 QG will not run. In some cases, they can easily be fixed. You Jan 21, 2024 · Keeping your Onan RV generator (Cummins/Onan) in top condition is the only way to ensure it operates when you need it most. I purchased the MH used Nov 29, 2009 · I've noticed that after my generator runs for 20 minutes it will start making this clanking/rattling noise. ( Pressing Stop again will stop the blinking. , an industry leader in reliable power solutions for more than 100 years. Equip yourself with the knowledge to Call 1-800-888-ONAN for the name and tele-phone number of the nearest Cummins/Onan or Onan-only distributor in the United States or Canada. Aug 15, 2020 · The generator was having some problems running, esp under the load of the A/C, so I made a gallon of fuel and sea foam and ran it directly through the generator bypassing the main fuel tank. All times are GMT -6. Gen started and ran without issue. The sparkplug gap is correct for LPG. 8. ) Customer: I have an Onan 4000 in my RV, and it began making a rattling noise after 63 hours of use. From filters to tune-up kits, Genuine Cummins Parts are made to exact product specifications to maximize the power output and life of your Onan generator. At first it is bright but after 3 seconds it will go dim and shut off. HOW DOES MY RV GENERATOR WORK? Note: While this troubleshooting guide is applicable to most makes of RV Gen Sets, there are many specific refer-ences to particular Onan® Models as these widely used RV Generators are the brand we (Flight Systems) provide replacement control boards, voltage regulators and test equipment (the G-MAN) for. If the Onan generator starts and then shuts down, there are several troubleshooting steps you can take to identify the issue. Jan 7, 2022 · Does anyone have a source or a homemade solution for changing out the vibration isolators that are between the Onan 10k generator and the sliding coach frame? Mine are sagging badly and are in need of Aug 11, 2024 · My Onan 4000 (mfg in 2014) has developed an intermittent rattle (begins approx 6-7 secs into attached recording). We´ve got you covered. I verified the oil was full, then ran the generator and rooftop A/C for 30 mins. This article explores the typical You can also go here to find Onan generator parts diagram and manual for many generator models or find Onan generator physical manual on eBay. Generators are lifesavers, especially for people that live in places that experience frequent blackouts. 0kW RV Generator (Gasoline) EVAP Model 1 2 3 4 5 6 7 8 9 10 Oct 2, 2023 · A: Fault code 33 on an Onan generator indicates an open or shorted circuit on the generator control board. It appears to be coming from the fan or blower hamster cage, and it sounds like a metal-to-metal rattle. RVs are perfect for taking the luxuries of the home onto Learn more about RV Generator Manuals from Cummins, Inc. Way quieter and smoother than the Generac (which sound like rattle traps IMHO). Manuals Brands Cummins Onan Manuals RV RV QG4000 EVAP - 4KYFA-6747 - 4. Just a thought, I did away with my wet muffler on account of it's now a land based generator. - After not running it for a few months (I know, bad thing) after it starts there is a loose part / grinding noise and heavier than normal vibration coming from the generator side. Their revolutionary design makes these generator sets up to 15 dB (A) quieter than other diesel-powered generators, and quieter than most gasoline sets. Newer Onan diesel-powered RV generators have fault codes that will display on the unit. But what happens when a generator misbehaves? What if it starts making so much noise that it becomes a disruptive element Voltage from the generator Q1-Q2 winding provides power to the voltage regulator VR1 to use for supplying field current to the generator. Looking for your next RV generator? Cummins provides durable, hardworking and quiet RV generators. When an Onan generator won’t start, understanding the common causes and systematic troubleshooting can help quickly restore power. It isn’t hard to read the Onan Fault Code blink system, although it is handy to have all the faults you could find and explain them. Upgrade and customize your genset with Cummins accessories for convenience, compatibility and customer service. . I need to go outside The Cummins Onan QG 4000 generator shutting down after hours indicates overheating, likely from insufficient cooling or airflow blockage. Cummins-Onan RV Generators work hard to supply power for weekend camping, long vacations, and full time RVers. Oil is good, new, spark plug, air filter Aug 29, 2007 · My Generac 5500 generator works fine, but has a "rattling" noise when running -- anyone experienced this? It has 269 hours, we use it regularly in our 2000 Sea View. Generator control Hi Friends, Have a ONAN RV QG 4000, with 250hrs on it. Feb 1, 2025 · Struggling with a malfunctioning Onan generator? Our comprehensive guide tackles common governor issues that can disrupt your power supply, providing practical troubleshooting steps to get your generator back on track. Dec 31, 2022 · Onan Generator Fuel Pump Troubleshooting: The main job of the fuel pump is to provide the engine with an adequate amount of fuel after regular intervals. 0 Genset. This guide provides comprehensive insights into Cummins Onan generator service, covering routine maintenance, common repairs, and expert service All times are GMT -6. Kind of a tap, or rattle sound that is new time to adjust the valves? Tips? May 26, 2022 · There are at least 15 good reasons why your Onan generator will not start. This comprehensive article explores common symptoms, troubleshooting tips, and the underlying causes of this frustrating issue. Feb 1, 2020 · I am sure this has been discussed before but has anyone found a solution to the Onan 3600LP backfiring after startup? It just backfires quite a bit for about 2 to 3 min before it settles down. I have been trying to find anything about this little generator I can, but for some reason there seems to be absolutely Maximize the power output and life of your Cummins Onan RV generator with filters, tune-up kits, and more that are built to exact product specifications. Sep 26, 2018 · Attachment 213306 I decided to post this topic to hopefully help educate the RV going public about how to properly operate, maintain and take care of your Onan generator for years of trouble free iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances Onan MicroLite 4000 surging iRV2. It’s important to pay attention to your generator and the sounds it makes, because loud noises can mask Customer: I have an Onan 5500 nestled snug in my 5th wheel camper. Jan 6, 2023 · I have a 2008 Patriot Thunder with the Onan 10000 Gen set. We are writing to inform you that Cummins Inc. Check the Cummins Onan QD 12000 - 12HDKCD-2209 - 12,000 Watt Quiet Diesel Commercial Mobile Generator (120/240V 50A) ratings before checking out. Jan 30, 2018 · Portable Power for the Great Outdoors Cummins-Onan RV Generator Maintenance Kits All engines need maintenance. If you'll look at the Start/Stop Button when the Generator stops running, it will be blinking, there will be a pause and then it will blink the same number of blinks May 23, 2018 · So I thought I would start by fixing the rattle on my Onan 3. Press Stop once to cause the two-digit, second-level fault code to blink. I'm hearing a rattle sound coming from the bottom it seems like. When I bought the MH the lady fired it up and it ran, powered up the rooftop A/c worked the microwave all was good. The time now is 06:47 AM. Dec 5, 2023 · An Onan generator is a reliable source of power for your RV or other applications. The generator has about 10 hours on it and has done it since we The Start / Stop / Prime Button will Blink out a Fault Code if the Generator quits running or won't start for whatever reason. The time now is 09:27 AM. (Refer to Generator AC Output Mode on page 6-29. For less noise-critical applications, choose from the Cummins Standard diesel series. From inside the coach I can start the generator just fine. You never know when emergencies can arise, and you lose shore power at your residence, RV park, or campground. Three-point, fully focalized internal mounting system reduces vibration. Today I have finally had time to investigate further. Plus: Quiet, in sound shield, no vibration, starts easy, runs well, churns out power. One of the main challenges is that the forum software we've relied on for over a decade is no longer compatible with current systems without significant redevelopment. 7 I recently purchased a 1000 Watt, single cylinder, water cooled electric generator, originally out of a sailboat. The Fault Codes and what they mean are Listed in the Owners Manual. Learn to identify symptoms of governor failure, perform essential maintenance, and ensure your generator functions reliably during outages. For example, if the light blinks 5 times then pauses, then blinks 1 more time, that signifies Fault Code 51. The internal switch will not work to shut it off. Battery voltage is 13. My Generator is Making Weird Sounds Generators aren’t exactly quiet, but sometimes they can be a little too noisy. I read on the internet that if a generator isn't What does 3 blinks mean on an Onan generator? From the Onan manual: Three blinks indicates a service fault. Depending on your generator for home or outdoor use? Learn how to check fuel supply, inspect electrical connections, and diagnose problems step-by-step, ensuring reliable power when Here's a good video on changing your Onan coolant: Change the Coolant in Your Onan Diesel RV Generator || RV Generator Maintenance Change the Coolant in Your Onan Diesel RV Generator || RV Generator Main Just makes sure you change the coolant with the generator fully warmed up so the thermostat is open. Feb 13, 2015 · Type:Onan 6. Jan 15, 2025 · Struggling with an Onan generator that cranks but won't start? This article guides you through troubleshooting common issues, from fuel supply to electrical problems, ensuring you're prepared during outages. The time now is 11:41 PM. The sound is very familiar to the "priming" clicking noise at start up. More towards the front where the fan is I put my hand on there and I can feel it hard vibration it's an intermitting rattle. It still runs nice and smooth and I haven't been able to pinpoint exactly where it's coming from. 41 (Controller unable to sense field or output voltage) Corrective Action: See an authorized Onan dealer. This article guides you through diagnosing the problem, offers maintenance tips to reduce noise, and emphasizes when to seek professional help. Aug 25, 2024 · Thanks to all who have replied. Discover simple steps to restore your generator’s functionality along with maintenance advice to prevent future problems. Troubleshooting is broken down into the four specific areas of the ENGINE, ENGINE CONTROL, GENER-ATOR and REGULATOR. From issues with the carburetor to challenges with the electrical system, users have reported a variety of complications that can cause a hiccup in its operation. This versatile service tool speeds the troubleshooting process by eliminating guesswork and pinpointing problems. has determined that a safety-related defect exists in certain Onan QG 2800i and Onan QG 2800i EVAP generators that were manufactured between March 3, 2020 and February 10, 2023. Don’t let power interruptions catch The situation that your Onan generator is running but there is no power in the RV can happen for two general reasons, either generator’s alternator is faulty or there is some interruption of the flow of electricity from the generator to your appliances. In this guide, I’ll share some of the common problems encountered with the Onan p4500i generator and also provide Dec 4, 2023 · When your Onan generator won’t stay running, there are several potential culprits that you should investigate: Fuel supply problems: Insufficient fuel or a clogged fuel filter can cause your generator to shut off. How To Fix Onan Generator That Keeps Shutting Off? If the Onan generator keeps overheating, ask a technician to add a heat shield (Between the engine and exhaust). This week while running it, it started to emit more of a "clunking" sound, very rythmic and regular (and pretty loud). It almost sounds to me like the starter gear is dancing around on the flywheel. Generators reviews from real customers. The provider no longer supports our Have you ever wondered how many hours should an Onan generator last? Look no more. These Onan/ Cummins air cooled units are super nice and run Jan 27, 2020 · I own a 2006 Tropical LX T350 with a Onan Quiet Diesel 8000 generator. while the genny was running there was a loud noise and a big could of dust that came from underneath the coach, Genny continued to run (although seemed to be a little faster not sure if it was or not) and there was a pile of aluminum Jan 20, 2013 · Re: 7. Anywhere from low oil to low fuel to a fuel leak to a bad ignition coil. Reconditioned, according to Onan agent sticker, and paint over everything. I've been thinking of carrying a 1/2" thick 4x6 piece of carpet foam just to throw under the motor home, under the generator so the noise doesn't bounce around and rattle throughout the Aug 30, 2017 · Is there any way to quiet the Onan generator? I don't think a muffler will help, as most of the noise seems to come out the side of the generator, not the exaust pipe. Feb 5, 2024 · - After running for about 20 minutes, a chirping sound would come from the generator side. Self-diagnostic capabilities simplify troubleshooting. Wow! this thing sounds like it is beating itself apart! There is a rattle sound like loose sheet metal riding over top of normal engine blat and generator whine, and I haven't found any loose parts yet May 12, 2024 · For Onan 4000 generator troubleshooting, check fuel level, inspect spark plug, and test air filter. A 90-day adjustment policy provides for minor adjustments during the first three months. 6, connected to shore power. came with boat, hour meter stuck @ 1370, I realized when it did not change. But, extended use of the air conditioner will drop the battery bank's SOC fairly low, so I decided to purchase a Champion dual fuel 2500 watt generator as a back-up for those occasional times when the battery level gets quite low. Neg: Had to replace start/stop solenoid. Sep 9, 2019 · How to Read Onan Generator Fault Codes: It’s not hard to read the Onan Fault Code blink system, once you get used to it. Under certain conditions, your Cummins Onan generator may show the fault code 33 after shutting down by itself, by blinking the status LED on the control switch 3 times followed RV Generator Handbook Introduction e road all it can be. This decision was not made lightly. Onan Generator DIY repair The problems we have listed above are some of the most common problems encountered by owners of Onan generators. Whether having a generator to power your RV is a necessity for you or a luxury, noise level is an important factor to consider. Keep your Cummins-Onan RV Generator maintenance up to date for easy starting, smooth running, and reliable operation. I have discovered that the spark at plug is barely there. Troubleshoot fuel and ignition issues effectively. 5k quiet diesel … All times are GMT -6. I hear a click, then a rattle but it won't turn over. How Loud Is An Onan Generator? Onan generators come stock in most RVs, and fall a bit under the National Park service noise restriction requirements of 60 decibels at 50 feet Jan 2, 2025 · Struggling with your Onan 4000 generator that won't start? This comprehensive article uncovers common causes behind startup failures, such as electrical issues, fuel supply problems, and mechanical failures. May 28, 2025 · Onan generators are widely used in RVs, boats, and commercial applications for reliable power supply. May 28, 2025 · Troubleshooting Common Reasons Why an Onan Generator Won’t Start An Onan generator is a reliable power source for many households, RVs, and businesses, but sometimes it can fail to start, causing frustration and inconvenience. This is a normal characteristic of the hydraulic valve lash adjusters filling with pressurized oil. Nov 12, 2024 · Learn about 5 common causes of an excessively noisy generator and how to troubleshoot each for smoother operation. Jan 3, 2005 · I have begun using a Honda 5500W generator while my lovely, quiet Onan 2 cyl. Serviced per Maint schedule, oil level correct. I shut it down, today che Apr 6, 2024 · Cummins Onan generators are the most common units found on RVs, and today, we are doing a deep dive on the maintenance required on the 10k and 12. Sep 26, 2013 · We have an Onan 4000 in our Phoenix Cruiser, the generator behind a good motor home door but open below. Note that DJE = the Onan engine used in the MEP002A and DJF = the Onan engine used in the MEP003A. It just sputters. When reliability Cummins Onan 12. 3542245 volts 115 60 Hz **s 1 amps 8. Explore the best RV generators for your next adventure. You may also love off-grid camping, where a generator… Feb 8, 2024 · Learn how to perform routine Onan RV generator maintenance. It makes the noise almost exaclty every 2 minutes and lasts for about 12 seconds. Learn However, even if you see the Onan generator codes, it’s good to know what they mean and how to read Onan generator fault codes. Cummins accessory kits support commercial and consumer gensets, as well as transfer switches and controls. 5-Kilowatt Quiet Diesel RV Generator for Class-A Luxury Motorhomes—Run 3 AC Units + 4000W—In Stock– Norwall Ships Free in 1-2 Days Forums to Be Paused as We Explore New Community Tools After careful consideration, Family RV Association will be pausing the Forums effective May 9th, 2025. Ran jumpers from battery to starting solenoid and negative to ground. Understanding Onan generator fault codes is essential for diagnosing issues quickly and maintaining uninterrupted operation. Free Shipping. Many common issues can be fixed easily by following these steps. 8 Beta 1 Copyright ©2000 - 2024, vBulletin Solutions, Inc. Jul 21, 2023 · Clattering or Ticking Noise on Generator Engine Startup On some units, after long periods of storage OR at initial startup and commissioning, the engine may exhibit a lighter clattering or ticking type noise from the upper end of the engine. I have the apparently ubiquitous Onan Quiet Diesel shut- The Onan Quiet Diesel Generator warranty covers parts and labor on major power train and generator set parts in the third year. Dec 26, 2018 · The following manuals are Onan manuals that are useful for finding and ordering parts for your MEP002A or MEP003A. Environment This issue may be observed on initial GENERATOR ROTOR FAULT—CODE NO. Start by checking the fuel level and inspecting the fuel pump, filter, and lines. Mar 28, 2023 · Onan Microquiet 4000 Problems: If all the hardware parts in your generator are working fine then the problem might be from your battery instead. is laid up. com Google The Onan p4500i generator, while acclaimed for its performance and reliability, is not without its share of problems. Despite its robust design, users may encounter operational challenges requiring effective troubleshooting. However, like any mechanical device, they can experience faults indicated through specific fault codes. This is the second time it's one this. Mar 3, 2008 · Hello, I have a Onan Marquis 5500 and a possible problem. Computer-controlled constant speed operation - quiet diesel performance for larger RVs. The geraerator makes a clicking sound while running. Nov 23, 2019 · Hi guys, just got out of the hospital and when I get home my generator sounds different. Dec 4, 2023 · Frequently Asked Questions about Onan Generator Troubleshooting Guide Q: How often should I perform maintenance on my Onan generator? A: Regular maintenance should be performed as per the manufacturer’s recommendations. Cummins has initiated a recall of the subject generators. To ensure these generators operate efficiently and extend their lifespan, regular service and maintenance are essential. Discover essential troubleshooting steps, maintenance tips, and when to seek professional help. com Google Oct 2, 2023 · When dealing with fault code 3 flashes on your Onan generator, it is important to approach the troubleshooting process systematically. Get steps for changing oil, and contact Mainline RV & Truck Service for Onan generator repair. Have you ever wondered how loud is an Onan generator? Look no more. This guide offers detailed explanations of the most common fault Feb 14, 2015 · DescriptionEnjoy 100+ live TV channels and on-demand TV with entertainment, sports, news, and more Great prices and Fastest Shipping for Cummins Onan Quiet Series Onboard RV Generator - 5,500 Watts - Propane - CARB Compliant. Sign up now Enjoy the latest deals, offers, promotions and access to My Garage May 25, 2019 · Making an Onan Quiet Generator Quieter - Mike Mas Hello - I thought I would share one of my recent projects - For the most part the “Q” Onan generators which stands for “Quiet” have very respectable noise levels today, since unlike earlier generators which had thin steel cases with no Jan 1, 2023 · Onan Marquis 7000 Troubleshooting: There have been quite a few complaints regarding Onan Marquis 7000 shutting down when you put a little bit of load on it. Check the air filter and cooling fins for debris or damage. Diagnosis can account for up to 80% of ser-vice labor cost. Special sound-controlling housing encloses cooling system and muffler. They use a blink and pause design to make their numbered codes clear and not confusing. Oct 16, 2011 · iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum Onan Marquis Gold 5500 Gen Problem iRV2. Empower yourself with the knowledge to diagnose and fix starting issues May 28, 2025 · The Onan 4000 generator is widely used for providing reliable power in recreational vehicles, homes, and commercial setups. Cummins Onan generators are engineered for years of trouble-free service and our nation-wide service network is the la gest in the industry. Discover essential checks, from fuel supply to electrical connections, and learn how regular maintenance can prevent future failures. May 28, 2025 · Cummins Onan generators are renowned for their reliability and performance, powering RVs, commercial vehicles, and backup systems. Initial run after installation of my 20kW generator. (See attached List of Generator Set Jun 9, 2025 · Your Onan diesel generator oil change is a very important part of RV maintenance. Nov 17, 2024 · Discover effective solutions for your Onan generator that runs but produces no power. The units are totally enclosed, including cooling, muffler, and intake systems. This typically includes oil changes, filter replacements, and inspections at specific intervals. Ensure reliable power for your adventures or emergencies by keeping your generator in top shape. Dec 5, 2014 · 1MUK-1R/B 427. Easy, accessible maintenance points. That’s why Cummins Onan is the number one, best-selling line of installed generators in Jan 14, 2025 · Is your Onan propane generator refusing to start? Don’t let a power outage catch you off guard! This article offers essential troubleshooting tips to identify and resolve common issues like fuel supply problems, battery issues, and ignition failures. In this post, we show you exactly how to do it yourself. Oct 14, 2024 · Discover common causes and solutions for why your Onan generator keeps shutting off. I had a generator rattle while the generator was running Feb 17, 2025 · Is your generator making a loud rattling noise? Discover the common causes behind these disruptive sounds, from loose parts to fuel issues, and learn effective troubleshooting techniques. High Mar 11, 2025 · Sorry for opening another diesel generator thread but I've search here, all over the www, studied the manual, and called Cummins but no answers. I've concluded that most of the noise is NOT related to the exhaust, but rather "MACHINE NOISE". ) Jan 30, 2018 · Onan 4000 gas. Oct 8, 2021 · All Onan generator troubleshooting codes, their meaning and fixes The generator’s controller provides extensive diagnostics by causing the status indicator light on the Control Switch to blink in a coded fashion. (This automated service utilizes touch-tone phones only). jfs1zbj b9wd dlmo oy 2pcnpm ntigv zktlvmqy qg e0 f4t3n