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  1. #11
    Platinum Member
    Join Date
    Feb 2012
    Posts
    725
    Location
    Albany OR
    Tractor
    Case 580B, Long 460, Allis-Chalmers 160

    Default Re: Honda GX390 wont stay running

    Of the three things in the "fire triangle", spark is the only one that should be that much like turning off the switch - if you have one of those cheap "neon screwdriver" testers, you might try holding the tip of it next to the spark plug wire - if it blinks when there's spark, it could maybe tell you EXACTLY when/if spark goes away.

    Assuming this works (haven't tried it, just know they're pretty susceptible to extraneous signals sometimes) it would show you whether the spark quits BEFORE the engine stops turning (as in, when the engine STARTS to die) or AFTER (as in, spark was still there til the engine physically stopped turning)

    Actually, if the cheapy screwdriver doesn't work you might need a "tic tracer", which is designed for "proximity" testing -

    Main thing is, if there is still spark when the engine is in the process of dying but still turning, that would tell you whether to look for a bad/grounded connection or switch, or something else entirely.

    If you're not sure what kind of testers I'm referring to, I can find a link... Steve

  2. #12
    Platinum Member
    Join Date
    Feb 2012
    Posts
    725
    Location
    Albany OR
    Tractor
    Case 580B, Long 460, Allis-Chalmers 160

    Default Re: Honda GX390 wont stay running

    Sooo, Aaron - any luck on this yet? Enquiring minds wanna know :=)... Steve

  3. #13
    Super Star Member murphy1244's Avatar
    Join Date
    Nov 2011
    Posts
    16,805
    Location
    Ohio
    Tractor
    Kioti DK 40-Massey ferguson 135-Ventrac 4500 Diesel

    Default Re: Honda GX390 wont stay running

    Yea! What's up with it?
    Murph ------------

  4. #14
    Super Star Member
    Join Date
    Mar 2008
    Posts
    10,277
    Location
    Northern Fingerlakes region of NY, USA
    Tractor
    Kubota L3830GST, B7500HST, BX2660

    Default Re: Honda GX390 wont stay running

    New plug seems to have fixed it...

    Aaron Z
    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
    Robert Heinlein, Time Enough for Love

  5. #15
    Super Star Member murphy1244's Avatar
    Join Date
    Nov 2011
    Posts
    16,805
    Location
    Ohio
    Tractor
    Kioti DK 40-Massey ferguson 135-Ventrac 4500 Diesel

    Default Re: Honda GX390 wont stay running

    Quote Originally Posted by aczlan View Post
    New plug seems to have fixed it...

    Aaron Z
    Yeaaaah!
    Murph ------------

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