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 ps1067 Your Own Question

ps1067
ps1067, Small Engine Technician
Category: Small Engine
Satisfied Customers: 94
Experience:  Lawn and small engine mechanic12 years
52099655
Type Your Small Engine Question Here...
ps1067 is online now
A new question is answered every 9 seconds

i HAVE A JOHN DEERE 172 KAWASAKI CODE 420V, IT HAS NO SPARK.

Resolved Question:

i HAVE A JOHN DEERE 172 KAWASAKI CODE 420V, IT HAS NO SPARK. PLEASE HELP
Submitted: 3 years ago.
Category: Small Engine
Expert:  ps1067 replied 3 years ago.

First check to see if you have a safety switch problem. Do this by disconnecting the coil ground wires. There is a black wire coming from each coil. remove them and see it you have spark. The engine should run but it will not shut off without these wires connected. If you still do not get and spark from the coil(s) they ether are not adjusted closely to the flywheel or are bad. I have had both coils go bad on a 420 engine a few times. cant explain why. To test safety switches just use jumper wires between the connectors until you find the one that is bad. Seat, Brake, PTO (blades), etc.

ps1067, Small Engine Technician
Category: Small Engine
Satisfied Customers: 94
Experience: Lawn and small engine mechanic12 years
ps1067 and 6 other Small Engine Specialists are ready to help you
Customer: replied 3 years ago.

 

HI J.R. I CHECK THE GROUND WIRES ON THE COIL ,BUT WHEN I DIDTHE COIL BY THE STARTER THE ENGINE WOULD NOT TURN OVER .WITH THE COIL NEAR THE FLYWEEL,I STILL HAD NO SPARK.DO YOU HAVE A DIOGRAM FOR THE SAFTY SWITCHES? THANK YOU PAUL IS THERE ANY POINTS UNDER THE FLYWEEL?

Expert:  ps1067 replied 3 years ago.
It should still crank with the wire disconnected to the coils. If it don't crank over you might have a safety switch or starter problem. The only way you will have points is if the engine is very old. Like more than 30 years old. If the ground wires are removed on the coils you should get a spark. the ground wires ground the coils to kill the engine when the key or a safety switch grounds it. The engine should even run with them disconnected but with the only way to shut off the engine is to pull the spark plug wires. Unfortunately, John Deere does not publish a wiring digram for the open market. It is not available anywhere but from Deere. They might bet able to print something out for you.

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.