RV

Have RV questions? Ask an RV mechanic online.

Ask an Expert,
Get an Answer ASAP!

I have an onan marques 7000 that is not sparking at the

Customer Question
I have an onan...

I have an onan marques 7000 that is not sparking at the spark plug.

Mechanic's Assistant: What's the make/model/year of your RV?

It is a used gen put into my 1990 bounder 36 ft

Mechanic's Assistant: What is the model of your '90 RV?

Guy putting it in has replaced rotar, volt reg, plug board.

Mechanic's Assistant: Are you fixing your Volt yourself? What have you tried so far?

Bounder

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

It should have said plug and board.

Submitted: 9 months ago.Category: RV
Show More
Show Less
Ask Your Own RV Question
Answered in 16 minutes by:
8/6/2017
RV Mechanic: Wayne, RV Mechanic replied 9 months ago
Wayne
Wayne, RV Mechanic
Category: RV
Satisfied Customers: 11,013
Experience: Work on several type of Rv engine, Trans, brakes
Verified

Hi I'm Wayne

I will try to help you with this

is this gas or diesel,

Ask Your Own RV Question
RV Mechanic: Hank F., RV tech - emphasis on gensets replied 9 months ago
Hank F.
Hank F., RV tech - emphasis on gensets
Category: RV
Satisfied Customers: 15,719
Experience: RV tech since the beginning of the millenium.
Verified

Hello, my name is ***** ***** I am going to assist you with this.

I am a certified Onan technician, and am fully qualified. I realize that this is a gas model, just due to the fact that it has spark plugs.

First, test the positive terminal of the coil for 12V while cranking the engine. If you do not have 12V, you have a bad control board, or a broken wire between the control board and coil.

If you have 12V, here is what you need to do.

Disconnect the red and black ignition module wires from the terminals of the coil.
Run a 12V jumper to the red wire of the ignition module. Set your meter to VDC and connect the black meter lead to a good ground.
Connect the red meter lead to the black wire coming from the ignition module.
Using a 3/8" Allen wrench in the rotor through bolt located in the center of the right hand side of the set, slowly turn the engine counter clockwise as viewed from the right end. The meter should read 12V for 1/2 revolution and drop to about 1V for the other half revolution. Turn the motor through at least 3 full revolutions.

What happens?

If you don't get a full 12V for 1/2 revolution, but the voltage does for the other 1/2 revolution, the ignition module is bad.

If the voltage doesn't read a full 12V, but does change, the ignition rotor is probably broken.

First, remove the (2) 5/16” screws that secure the ignition module to the top of the generator housing, being very careful not to drop the screws inside. If they fall in, the generator MUST be pulled to remove them. They will do a lot of damage if the set is started with them inside.
There is a trick to getting the module out. The flywheel has fins on it to move cooling air across the generator. One of these fins is shorter than the others. The engine must be rotated so this shorter fin is at the top of the flywheel. Depending on how your set is mounted, it can be very difficult to see down in there, and I often have to use a small flashlight and inspection mirror.
Once this short fin is at the top of the flywheel, the module can be removed. It is a very tight fit, but it will come out. Pay strict attention to how the wires are routed in relation to the module. If the wires are not reinstalled EXACTLY as they are, either the module will not fit when putting it back in, or the wires will be hanging in the way of the flywheel and will get cut.
Once the module is out, simply disconnect the 2 wires from the coil.
After the module is out, we need to inspect the ignition rotor for damage. The rotor is a long piece of plastic that snaps onto the crankshaft, and has a magnet at each end. The magnets are what open and close the contacts in the module.
Looking down into the hole, turn the engine so one of the ‘arms’ of the module is straight up. Stick your finger down into the hole, and press sideways (rotational) with about the same amount of pressure you would need to slide an empty coffee cup across a table. Turn the engine 180 degrees and test the other arm in the same manner.
The arms should not move. If they do, the rotor is cracked and must be replaced.
If the rotor is OK, just change the ignition module.

Ask Your Own RV Question
RV Mechanic: Hank F., RV tech - emphasis on gensets replied 9 months ago

Was this what you wanted to know?

Ask Your Own RV Question
RV Mechanic: Hank F., RV tech - emphasis on gensets replied 9 months ago

Hello, was this what you wanted to know?

Ask Your Own RV Question
Was this answer helpful?
Ask Hank F. Your Own Question
Hank F.
Hank F.
Hank F., RV tech - emphasis on gensets
Category: RV
Satisfied Customers: 15,719
15,719 Satisfied Customers
Experience: RV tech since the beginning of the millenium.

Hank F. 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:

Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV.

DutchUSA

Highly recommend this RV expert. Prompt, good and detailed answers were given. Very willing to help with genuine concern. I will ask for him next time.

JackUSA

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

< Previous | Next >

Meet the Experts:

gene

gene

RV Mechanic

1,100 satisfied customers

28 yrs exp in the industry

Nick

Nick

RVIA Certification

664 satisfied customers

5 years RV repair and reconstruction, Fleetwood RV Training course completion.

Steve F.

Steve F.

RVIA Certification

443 satisfied customers

Journeyman and Master RV technician, Mechanical & Aerospace Engineer. RVIA Technical Consultant

Robert

Robert

RV Mechanic

12,591 satisfied customers

18 yrs. RV experience including Cummins North West, Country Coach, Monaco Coach - vendor certified.

Randall

Randall

RVIA Certification

12,274 satisfied customers

RVDA/RVIA Master Certified Technician with many years experience.

Wayne

Wayne

RV Mechanic

11,013 satisfied customers

Work on several type of Rv engine, Trans, brakes

Chris (aka-Moose)

Chris (aka-Moose)

RV Mechanic

456 satisfied customers

16 years of experience

< Previous | Next >

Related RV Questions
2003 Winnebago Brave 32, house fan switch on dash, when
2003 Winnebago Brave 32, house fan switch on dash, when switched to high, it blows fuse … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
I have a winnebago adventurer 2003 and a basement AC, the
I have a winnebago adventurer 2003 and a basement AC, the fans dont blow any air and I dont no what to check … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
Shore power and genset issue where both produce and deliver
shore power and genset issue where both produce and deliver 120 vac to panel but not to the breaker bus bar at the main breaker … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
WHW Hydraulic Leveling system (625): The motor does not come
WHW Hydraulic Leveling system (625): The motor does not come on, shows the green 'travel" light but when we push the "level" button nothing happens. I can hear the selenoids clicking, but no activity.… read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
Brand new 2018 Palazzo 36.3. Generator won't start, just
Brand new 2018 Palazzo 36.3. Generator won't start, just multiple clicks. Batteries are charged. Also, none of the basement lights will come on. … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
2010 Tuscany. line 1 on panel over door says Fault. ground
2010 Tuscany. line 1 on panel over door says Fault. ground problem. slides wont work. PATIO AWNING WONT GO OUT AND VACCUUM SYSTEM WONT TURN ON. WHERE DO I LOOK FOR THE GROUND PROBLEM? … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
Have brand new eagle ht camper left home all electric was
Have brand new eagle ht camper left home all electric was working got to new locate set up power cord good but no electric inside all breakers r good need help … read more
Robert
Robert
RV Mechanic
Vocational, Technical or Trade Scho
12,591 satisfied customers
2004/5 road trek 190 popular anniversary edition.
hi there. 2004/5 road trek 190 popular anniversary edition. onan/cummins generator. I don't get any charge at house battery with gen. running. engine alt. puts out 14.5 or so.Is there a circuit breake… read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
We have a 2018 Jayco Whitehawk 24MBH. I turned the fridge on
We have a 2018 Jayco Whitehawk 24MBH. I turned the fridge on Sunday and tonight I noticed the freezer is working but not the refrigerator. We are running it on electric right now. … read more
Robert
Robert
RV Mechanic
Vocational, Technical or Trade Scho
12,591 satisfied customers
Can I adjust slide out myself or do I need to bring into a
Can I adjust slide out myself or do I need to bring into a dealer? Goes in and out but was something in the way that caused it to be out of whack a bit … read more
Robert
Robert
RV Mechanic
Vocational, Technical or Trade Scho
12,591 satisfied customers
Only one side of my 120 volt system works which would be the
Only one side of my 120 volt system works which would be the kitchen side the passenger side has no juice … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
My stove is not getting propane after taking out my old
my stove is not getting propane after taking out my old water heater … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
We are in a Thor motor home /RV from Fraser way (an A class)
We are in a Thor motor home /RV from Fraser way (an A class) and a EO3 code is beeping on the voltage panel, what does this mean and how can I fix it? … read more
Robert
Robert
RV Mechanic
Vocational, Technical or Trade Scho
12,591 satisfied customers
Norcold model 6162 would only work on electric till I
Norcold model 6162 would only work on electric till I cleaned out the chimney. Now last trip would only work on gas. Any suggestions? … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
I have a 2018 Surveyor and need an owners manual or
I have a 2018 Surveyor and need an owners manual or something to tell me what to do to get rid of the anti freeze and get it ready to camp … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
Our Norcold refig in our camper turned off last night and
our Norcold refig in our camper turned off last night and makes a beeping sound. It will turns on but turns off within a few seconds and again makes a beeping sound. Serial 20539343, model 2118 3000BT… read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
Just set it up first time for the season. Filled water tank.
Just set it up first time for the season. Filled water tank … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 satisfied customers
It has a broken spring. Where can I find one? Rialta, 1999.
Not fixing self. Winnebagoind, Forest city Iowa has spting but not the bushings … read more
Randall
Randall
RVIA Certification
Vocational, Technical or Trade Scho
12,274 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