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small engine ?

jwb267

i have an engine that will not start, UNLESS i connect a spark tester to it. then it will start with the first pull. it has a new spark plug

any idea as to why

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Comments

16 comments

Date Votes
  • Grunt2

    Timing...

    0
  • BobJudy

    If this is a simple in-line spark tester it may be making a better connection to the plug wire than the sparkplug is. Check the clip in the wire boot to make sure it connects properly to the plug. Bob

    12
  • Wild Turkey

    Weak magneto? Tester increases resistance ???

    Been too long since my electricity classes 🙄

    Check/clean connections inside case where magneto is.

    0
  • montanajoe
    • Community moderator

    + another for bob's reply

    0
  • varian

    since the coil and sparkplug wire are usually an assembly that is what i would replace.

    0
  • varian

    you would b suprised how inexpensive small engine parts are on the internet. i dont even bother with trying to fix or rebuild most parts, just order a new one. most small engine carburators are less than $20.00 and come with new fuel lines, one or two fuel filters, several fuel bulbs, air filter and a spark plug.

    3
  • varian

    i have ordered and installed at least 50 carburators in the past couple of years and probably 95% have worked perfectly and the ones that didnt were replaced in less than a week. i just replaced a carb on a yamaha 125 dirt bike. the Mikuni original was nearly $300.00 the chinese knockoff i bought was $30.00 and leaked gas. notified the seller and in less than a week they sent me another one that worked perfectly. I'm not a big fan of chinese purchases but i have discovered that even if i buy a U.S. branded part it is still made in China.

    12
  • select-fire
    varian: 30634027565595/comments/30634042240283

    since the coil and sparkplug wire are usually an assembly that is what i would replace.

    Yes

    0
  • Nanuq907

    Check your grounds. The spark plug tester is creating one for you.

    0
  • jimdeere

    You have a ground problem. See it all the time.

    3
  • jwb267

    thanks for all the info.

    appreciate it

    0
  • Okie743

    Go over here and post your question. It's a small engine forum.

    Professional Power Equipment Technicians & Education Network (PPETEN) • Index page

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  • Ruger4me

    jwb267 did you find the issue? inquiring minds would like to know.

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  • jwb267
    Ruger4me: 30634027565595/comments/30634090185627

    jwb267 did you find the issue? inquiring minds would like to know.

    no . i put it away until next year. i will just buy another plug tester and leave it attached😁

    15
  • jwb267


    0
  • Okie

    Try your tongue

    0

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