How JustAnswer Works:

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

Ask Curtis B. Your Own Question

Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 8125
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
30244710
Type Your Small Engine Question Here...
Curtis B. is online now
A new question is answered every 9 seconds

wheel horse tractor 520h onan 20 hp engine cranks but will

Customer Question

wheel horse tractor 520h onan 20 hp engine cranks but will not start checked plugs coil stantor switcher ignition control all safey switces gets pleny of gas
Submitted: 5 years ago.
Category: Small Engine
Expert:  Hank F. replied 5 years ago.
<p>Hello,</p><p>What is the full model number of the engine?</p><p> </p><p>Is it getting fire at the spark plugs?</p>
Customer: replied 5 years ago.
no spark at plugs
Expert:  Hank F. replied 5 years ago.
Does your engine have the 4 pin connector or the 6 pin connector?

When you checked the coil and stator, how did you test them and what results did you get?

Are you getting 12V to the positive terminal of the coil while cranking?
Customer: replied 5 years ago.
6 pin checked to mak sure tight checked with volt meter dont remember values but comparded them with the values with toros specs for the onan engine
Expert:  Hank F. replied 5 years ago.
<p>OK</p><p> </p><p>1. Did the engine just quit, or did you have it taken apart for some reason?</p><p> </p><p>2. Teh ignition coils each have a black wire coming out of them that go to a small unit called a stop diode. Disconnect both black wires from the diode and try to start the engine. Do you have spark now?</p>
Customer: replied 5 years ago.
engine exhaust value robore and reseated just got it back from the shop and put it in today engine was running when it was taken in to the shop engine turns over but will not start
Expert:  Hank F. replied 5 years ago.
<p>OK</p><p>A head job should have nothing to do with it not getting spark all of a sudden.</p><p>The ignition coils each have a black wire coming out of them that go to a small unit called a stop diode. Disconnect both black wires from the diode and try to start the engine. Do you have spark now?</p>
Customer: replied 5 years ago.
where are the 2 wires located that go to the small stop diode and where is the small diode at
Expert:  Hank F. replied 5 years ago.
<p>The 2 wires are the black wires that come off the ignition coils. They will look like they come out of the engine itself, from under he flywheel. </p><p>I do not know where put the diode at. It will have 3 wires attached to it, and all 3 wires will be black.</p><p>There will be a relay, probably in front of the dash, that will have a white and a black and 2 other ground wires (either black or green). This black wire will also lead to the stop diode.</p>
Customer: replied 5 years ago.
what do i need to remove to acess the the ignition coil all so to acess the stantor and ignition control is the relay in the front dash or behind the engine
Expert:  Hank F. replied 5 years ago.
<p>The relay was installed by Toro, so I can not say for sure where it is, but they are usually in front of the dash area, behind the engine. It may be on the engine.</p><p>To access the coils and magneto, you will need to remove the flywheel, as they are mounted underneath it.</p>
Expert:  Hank F. replied 5 years ago.

Another way to find the stop diode is to find the low oil pressure switch. It will be the sensor mounted next to the oil filter. There will be 3 wires on this switch - red, white and blue.

Follow the white wire back to the relay, then follow the black wire back to the stop diode.

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. Jimmy Bagley, IA
< Last | Next >
  • 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. Jimmy Bagley, 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
< Last | Next >
  • http://ww2.justanswer.com/uploads/KO/koboma/2012-6-6_20917_DSCF1022.64x64.JPG Curtis B.'s Avatar

    Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
  • http://ww2.justanswer.com/uploads/SM/SmEngPro/2012-8-5_3564_Rick1206290005Edit.fullres.logo.scrn.64x64.jpg Rick's Avatar

    Rick

    Factory Authorized Trainer

    Satisfied Customers:

    4126
    Outdoor Power Equipment technical trainer since 1990, covering eight states.
  • http://ww2.justanswer.com/uploads/GI/giftindex/2011-11-19_2715_JamesLWells500.64x64.jpg James W's Avatar

    James W

    Small Engine Troubleshooting Expert

    Satisfied Customers:

    2978
    7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years
  • http://ww2.justanswer.com/uploads/jonrk/2010-1-5_22551_jon.jpg Jon K.'s Avatar

    Jon K.

    Small Engine Diagnostic Expert

    Satisfied Customers:

    2950
    Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines
  • http://ww2.justanswer.com/uploads/MR/mr2cycle/2011-3-12_03458_sears.64x64.jpg Vince O.'s Avatar

    Vince O.

    Small Engine Technician

    Satisfied Customers:

    2374
    Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers
  • http://ww2.justanswer.com/uploads/rheisnger/2010-12-31_010856_41385_100001225699183_7012_q.jpg RUSS's Avatar

    RUSS

    SERVICE TECHNICIAN

    Satisfied Customers:

    1723
    28 YEAR SERVICE TECHNICIAN
  • http://ww2.justanswer.com/uploads/BriggsEngines/2010-02-26_230200_n1834842973_4823.jpg CJBennett's Avatar

    CJBennett

    Small Engine Technician

    Satisfied Customers:

    623
    Briggs and Stratton Master Service Tech, Kohler, Tecumseh, Kawasaki certified. 18 years exp.
 
 
 
Chat Now With A Technician
Curtis B.
Curtis B.
Technician
8125 Satisfied Customers
have worked on and around most engine models for 35 yrs./Polaris ATV expert