Cummins Onan
Cummins Onan Overview
The generated data is based on reviews and questionnaires provided by PissedConsumer.com users.
Cummins Onan has a 1.8 star rating from 31 reviews, with consumers mostly dissatisfied. Rating distribution is heavily unfavorable. 67% of users would likely recommend the company despite frequent complaints about price and warranty.
Key Takeaways for Future Customers
- Read Cummins Onan reviews for reliability trends before buying.
- Expect customer service and dealer response issues; have refund expectations in mind.
- Consider parts availability and warranty coverage when comparing generators.
Negative Feedback / Risk Areas
- Poor customer service and no callbacks reported.
- Frequent breakdowns and warranty denials leading to high repair costs.
- Parts shortages, long delays, and complaints about high price level.
Positive Feedback
When the generators work they perform well; some techs have been helpful.
The generated data is based on reviews and questionnaires provided by PissedConsumer.com users.
Cummins Onan has a 1.8 star rating from 31 reviews, with consumers mostly dissatisfied. Rating distribution is heavily unfavorable. 67% of users would likely recommend the company despite frequent complaints about price and warranty.
Key Takeaways for Future Customers
- Read Cummins Onan reviews for reliability trends before buying.
- Expect customer service and dealer response issues; have refund expectations in mind.
- Consider parts availability and warranty coverage when comparing generators.
Negative Feedback / Risk Areas
- Poor customer service and no callbacks reported.
- Frequent breakdowns and warranty denials leading to high repair costs.
- Parts shortages, long delays, and complaints about high price level.
Positive Feedback
When the generators work they perform well; some techs have been helpful.
Media from reviews





This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerGenerator questions
I left a message and no one returned the call. Only gave the 3 stars as the one other time I called about a year ago a man called me back and was very helpful!
User's recommendation: Call back
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerNot satisfied.
- - The generator never runs right.
- - Most of the past three years have been in the shop, with over $2,000 spent trying to fix it.
- - It's back in the shop.
The generator is a lemon. It's never run like it should.
The thing has spent most of the three years we've had it in the shop. We have spent over $ 2,000. plus to try to get it to run like it should. I owned many generators in my life and they were never a problem.
I owned a Onan on my boat, and it ran perfect. It's back in the shop.
No response
- - Onan generator issue; parts paid 18/04 and service booked for 14/05.
- - Express part not arrived after a month; USA-only availability impacts EU customer.
My name is {{Redacted}} srls Imperia Italy.
I have a client who has a problem with a Onan generator, please, find attached the model of the generator.
I contacted your official dealer, Motormarine in Margherita Ligure to fix the problem.
I ordered and payed necessary parts 18/04 and fixed a day for the job (14/05/24).
One of the parts needed to be delivered with express courier (as the mechanics told me the part will be delivered in 48hours max).
After nearly a month (13/05/24), I called to be sure that the parts have been delivered and the job will be done. But the mechanics said that this part with express delivery hasnt arrived yet.
Now were more than 1 month since payment had been made and the part is still not here. I now discover the part can be ordered in USA for USA customer, but not for an European customer.
Please, could you suggest me how to proceed with this situation, because my client needs this generator fixed and to leave the port.
If the part in attached is not available. Please advise post haste. You are now costing a Cummins customer money in port and dockage fees.
Preferred solution: Deliver product or service ordered
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerBeen broken down at least once a year
- - Warranty is useless and a money grab.
- - Motorhome broke down at purchase, costing about $700.
- - Replaced Onan with Predator; won't buy Onan again.
The warranty is purely useless
Even when I first bought the motorhome it broke down and I had to pay approximately $700.
The stater went out
Buying a warranty is just a way to get more money out of you. I have to carry an extra generator if I know I'm going to need it. It'll setting in my
Motorhome right now and as usual broken down.
Just bought a predator 5000 duel fuel inverter generator and used it to replace the onan which I must call just a piece of high price junk
I'll never get another one
Will be Buying a new motorhome next year and it will absolutely not have a onan in it or I surely won't purchase it
User's recommendation: Don't waste your time on a onan
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerFirst tiime using generator it would not start on fuel/gas.
- - Searched online; the site was unclear.
- - The tech seemed unsure and couldn't fix it.
- - Fuel did not reach the carburetor; we used propane.
We called tech services after much searching on the internet. The website was not clearly identified.
We spoke with a tech who did not seem confident that he could help. After trying several suggestions from the tech, it was determined that the fuel/gas was not getting to the carburetor. We then decided to try using propane. We had not brought the adapters for propane use, so we proceeded to the hardware store and purchased a regulator, a tank of propane, and a hose.
We took it back to the campsite, but the connection on the generator was not a standard size.
Out of utter frustration, I covered the fuel filler and blew as hard as I could, getting gas all over my face. Lo and behold, it started.
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified Reviewer |Problem wit at onan lp2500 microlite generator
- - Generator won't run on the RV propane supply.
- - It runs fine on a separate LP tank.
- - Onan says the generator is fine; issue is the supply line.
We have a 2500lp Microlite generator and it doesn't run with the RV propane supply. We hooked it up to a separate LP gas tank and it ran fine with no problems.
I called Onan customer support and they said if it runs fine with the other tank, that means the generator is fine; the problem is the supply line. They recommend calling the RV manufacturer to find out what the problem is.
- No comments
- O comenta
Preferred solution: Fixed my generator
User's recommendation: No recommendation
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerNew generator not working
The oil level was low and shut off after about 50 seconds. It will not start back up despite topping off the oil, it still will not run.
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified ReviewerFailed Fuel Pump
- - Onan generator, 100 hours, fuel pump failed; I replaced it.
- - Cummins first said it would cover, then said no; I may switch to a Honda inverter.
My RV Onan generator has 100 hours on it and the fuel pump failed. I bought one because we were leaving the next day for a trip and I had to replace it myself.
I called Cummins when we returned from our trip to ask about warrant. The first man I talked to assured me Cummins would take care of the problem, but passed me on to another person. After several days of being passed around to different departments around the country, I am now told there is no coverage.
Way to stand behind your product Cummins. I will put in a Honda Inverter when I have a major problem.
User's recommendation: Stay away
Incorrect information
Problem I called about was not diagnosed accurately with the person on the other end of the phone line
User's recommendation: Do not use
Info 2800 generator oil change
I dont have an issue, I dont know why you are sending theses emails. Please stop, I may have clicked on the site by mistake.
AVR FOR MY ONAN GENERATORS
- - Two Onan propane generators need AVR.
- - Specs: Model 125JC-18R131/7512AA, Gen 2006-00 0, 15 KVA.
TO Whom it may concern Good Morning
I have 2 onan generators working with propane
They need AVR and I believe that I am on the right place Here are some SPECS Make ONAN
MODEL NO 125JC-18R131/7512AA
GEN MODEL 2006-00 0
15 KVA
A bunch of *** who don’t answer the phone worthless waste of time I will go elsewhere *** you guys
To lazy to answer phone I dont got time for your *** I will go somewhere else a place that actually answers your phone calls
This review is written by an individual who has purchased the reviewed product/service and/or confirms being a paying customer of this company. Check our FAQ
Verified Buyer |This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified Reviewer |Dealer left me "High and Dry"
- - Spent $100k+ on diesel engines, generator and transmissions.
- - Dealer took payment, went dark; transmissions don't fit, and I can't reach anyone.
No change in status.
I bought over $100k worth of diesel engines, generator and transmissions for my boat. The dealer was supposed to do the install and as soon as they got their money, they went dark.
The engines, generator and transmissions were delivered, but the transmissions do not fit in the boat and there is no way to get in touch with anyone to resolve the problem.
This has been going on for almost two years now and I have tried countless times to get in touch with the dealer by phone and I have showed up on site with no luck to find anyone. My boat has been sitting in the yard racking up storage fees.
- Customer service
Preferred solution: I would like to get some attention to my problems and have the dealer execute the contract they agreed to.
User's recommendation: Don't buy from Cummins
Generator starts then dies
Recommendation I received was not the problem. I reached out again after discovering this and havent gotten a response.
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified Reviewer24 hours on 3600 propane generator fails to start
- - Generator has 24 hours and won’t start after regulator and spark plug changes, with about $1,000 to pull it.
This generator only has 24 hours on it. Its started running fine when we left it wouldnt start.
They told me to put a regulator on it. I did it didnt start so I pulled the spark plug. Put a new one in it, but before I started it, I run it over and over for about 30 40 seconds Cleaned out whatever mightve been in there with spark plug it the same thing wouldnt start backfired so now theyre pulling the generator at thousand dollars of cost for failed 24 hour 3600 propane generator.
I need help with this problem. I cant afford that.
User's recommendation: At this point don’t buy Onan Products
This review is from a real person who provided valid contact information and hasn't been caught misusing, spamming or abusing our website. Check our FAQ
Verified Reviewer |Horrible customer dealer service
Yes. Again the local dealer refuses to help any longer. The manufacturer sent two more dealer contacts but they could not help
Purchased and installed a new 20 kw single phase unit for a customer as I am an electric contractor. The unit is now 2 years old and has never been reliable.
The local Charlotte dealer has had several techs out to replace and test many times only to say now they are no longer going to provide service on this unit. How do you combat this situation?
Tried several times to contact the factory but no one there cares either... Will never recommend Cummins Onan again if we ever get this one straightened out...
- Poor customer servive
Preferred solution: Replace the generator
User's recommendation: Would not recommend
About
,
Onan distributes a wide range of specialized devices and products which are committed to the power generation industry. They are connected with residential usage, commercial usage, marine industry and even recreational vehicles. Onan offers residential generator models, generation diesel, gasoline, propane, hydraulic, accessories and parts, marine generators maintenance, RV diesel, gasoline and other generators. The company has been in business for more than 90 years and nowadays is involved into the modern advertising means, like social networks presence. It promotes its products to be environmentally friendly and safe and guarantees the quality standards. Onan is represented in the territory of the United States and executes shipment of the ordered products right to the customer. Concerning the main office, it is situated in Fridley, MN.
Cummins Onan is ranked 36 out of 1045 in Mechanical Engineering category
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