Small Engine

Small Engine Troubleshooting Problems? Ask a Mechanic Now.

Ask an Expert,
Get an Answer ASAP!

I have an onan marquis 7000 generator that has a major

Customer Question
problem. When you start it...
I have an onan marquis 7000 generator that has a major problem. When you start it , it runs good for about a minute then it starts loping.. It acts like the engine is shutting down, the choke opens, it revs up, and then it starts all over gain
Submitted: 11 months ago.Category: Small Engine
Show More
Show Less
Ask Your Own Small Engine Question
Answered in 10 minutes by:
9/21/2017
Technician: Curtis B., Technician replied 11 months ago
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 31,911
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

Ask Your Own Small Engine Question
Technician: Curtis B., Technician replied 11 months ago

It is starving for fuel and the governor is tryin gto compensate. Check the fuel deliver to the carburetor. Can have fuel pump not working or a fuel filter plugged, or a restriction in fuel line from the tank,

Ask Your Own Small Engine Question
Customer reply replied 11 months ago
I have changed spark plugs (2), put on new fuel pump, changed all fuel lines, and new fuel filter. Gasoline feeds from main fuel tank and it is half full. I unhooked fuel line just before filter and cranked engine, and pump is pumping great. Engine cranks up Google and runs good for about a minute, and then starts loping.
Technician: Curtis B., Technician replied 11 months ago

Try running it out of a fuel container, and not the existing fuel tank.

Ask Your Own Small Engine Question
Customer reply replied 11 months ago
I tried running from a container, it ran for almost a minute, with the choke almost fully open, and used about half a quart of gas and then it died and would not restart.
Technician: Curtis B., Technician replied 11 months ago

Is there an electric solnoid in the carburetor? Is it loosing voltage when it dies>

Ask Your Own Small Engine Question
Customer reply replied 11 months ago
I don't think it has a solonoid. The only electrical hook up is to an actuator that regulates air flow (I think)
Customer reply replied 11 months ago
I answered back, I don't know if their is a solonoid, the only electric hookup I can see is a actuator that looks like it controls the air flow to the carburetor.
Customer reply replied 11 months ago
Why haven't I received an answer???
Customer reply replied 11 months ago
I answered the expert back but haven't got anything back from him........
Technician: Curtis B., Technician replied 11 months ago

Sorry, had to take wife to Dr appointment. Experts work from home and are not always available. So you are saying it ran same from fuel container as from fuel tank? Will it immediately restart, or does it have t sit a while? Does it have spark at the plug when it quits?

Ask Your Own Small Engine Question
Technician: Curtis B., Technician replied 10 months ago

I see question is still open.??

Ask Your Own Small Engine Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Curtis B. Your Own Question
Curtis B.
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 31,911
31,911 Satisfied Customers
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert

Curtis B. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Curtis B.

Curtis B.

Technician

31,911 satisfied customers

have worked on and around most engine models for 35 yrs./Polaris ATV expert

Rick

Rick

Factory Authorized Trainer

4,218 satisfied customers

Outdoor Power Equipment technical trainer since 1990, covering eight states.

Jon K.

Jon K.

Small Engine Diagnostic Expert

2,995 satisfied customers

Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines

James W

James W

Small Engine Troubleshooting Expert

2,986 satisfied customers

7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years

Vince O.

Vince O.

Small Engine Technician

2,927 satisfied customers

Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers

Wayne

Wayne

Engine Rebuilder

2,041 satisfied customers

many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines

RUSS

RUSS

SERVICE TECHNICIAN

1,723 satisfied customers

28 YEAR SERVICE TECHNICIAN

< Previous | Next >

Related Small Engine Questions
I have an Onan Marquis 7000 generator, and carb is bad. I
I have an Onan Marquis 7000 generator, and carb is bad. I can't find a replacement anywhere. Is there an alternative that would work? … read more
Curtis B.
Curtis B.
Technician
Associate Degree
31,911 satisfied customers
I have an older Onan Pro 6000E gas generator with an engine
I have an older Onan Pro 6000E gas generator with an engine that is an Onan Elite 140 model #E140H-N11348D. The problem is now I start it fine and warm up for 10-15 minutes then turn the idlematic swi… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have Onan Marquis 7000 generator. It will start then it
I have Onan Marquis 7000 generator. It will start then it will run under load but when turn ac off it will then rev up and die. … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have an onan 5500 Marquis gold generator (genset). Starts
I have an onan 5500 Marquis gold generator (genset) . Starts but only stayss running when I hold choke closed. when it opens on its own it shuts down. Oil level ok, fuel pump ok , fuel in carb bowl ok… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I bought a 1995 Fleetwood Motorhome last month that came
Hello, I bought a 1995 Fleetwood Motorhome last month that came with an Onan Marquis 7000 Model number 7NHMFA26106D. The generator has been difficult to start form the beginning from a weak starter to hard starts without firing and once it does fire would die as soon as I let off of the start switch either form inisde the motorhome or at the generator itself. I found that if I hold down the star switch for several seconds after it initially seems to fire is the only way that the generator will continue running. I replaced the oil pressure sensor already but that did not solve the problem. … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
Engine will fire but not keep running. Everything you would
Engine will fire but not keep running. Everything you would think of was tried. … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have an Onan Marquis 7000 generator that is really trying
I have an Onan Marquis 7000 generator that is really trying my patience. I had the carb chem dipped, my brother in law changed out the fuel pump and filter. I went out last night and it started right … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
Just had my Onan Marquis 5500 serviced, put a load on it 40
Just had my Onan Marquis 5500 serviced, put a load on it for about 40 minutes last week and purred like a kitten shut it down went to start it up today and won't start. Cranks over fine but won't star… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I have an Onan Marquis 7000 in my race car trailer. Was
I have an Onan Marquis 7000 in my race car trailer. Was working fine for years, and 2 weeks ago it smoked the living quarters inverter and a 12v automotive battery charger. I started checking voltage,… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have an Onan Marquis Gold 7000 generator that stops
I have an Onan Marquis Gold 7000 generator that stops running after random lengths of time. Anywhere from 3 hrs to 10 minutes. It gives me a code 47 error. When you try to restart, it may fire right b… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
Hank, I am having a problem with my onan 5500 marquis gold
Hank, I am having a problem with my onan 5500 marquis gold generator. When I start the genset I get a code 12 which is over voltage. It will run about 20 seconds before shutting off. If I run the AC u… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have an onan 7000 marquis gold generator that runs fine for
I have an onan 7000 marquis gold generator that runs fine for 25-30 minutes then it starts to rev up and down every 10 seconds or so. All of the power and a/c stays on line during this.… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
7000 onan Marquis. Shuts down on its own after 10 minutes run
7000 onan Marquis. Shuts down on its own after 10 minutes run time. Thought it was the fuel pump. Still working. Fresh oil change. Taking cover off and blowing cool air on it, still shuts down. Plenty… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have a 1996 Onan Marquis 7000 in an rv. It will start and
I have a 1996 Onan Marquis 7000 in an rv. It will start and run great until I release the start button. It will continue to run about 2-3 seconds and then it shuts off like you turned the switch off. … read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
My Onan Marquis 5500 RV Generator starts(with difficulty and
My Onan Marquis 5500 RV Generator starts(with difficulty and acts like the choke is stuck on for about 2 min.)then will run for hours then just shuts off..sometimes will start right back up...some tim… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
onan 6.5 Starts right away, after running for a few minutes,
onan 6.5 Starts right away, after running for a few minutes, it revs up and then acts like it is going to die. It keeps doing this for about one minute and then back fires and then stalls.… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
My Onan marquis 7000 was running well and then just shut down.
My Onan marquis 7000 was running well and then just shut down. I added oil and it appears to want to start up, but will not stay started. Any advice would be appreciated. TIA Ricky Thibodeauxx… read more
Hank F.
Hank F.
Service Technician
High School or GED
5,365 satisfied customers
I have an Onan Marquis, 7000, gas, generatori, in a 98 motorhome,
I have an Onan Marquis, 7000, gas, generatori, in a 98 motorhome, that has always performed flawlessly. Now, when I start it, either in the coach, or at the generator, itstarts instantly, but dies as … read more
Tech4you
Tech4you
Electrician/Mechanic
Associate Degree
1 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x