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Subject: starter button autopsy result

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2NTony    Posted 02-23-2018 at 22:27:05 [URL] [DELETE]        [Reply] [Email]  
  • starter button autopsy result
  • 2N, 12 volt conversion.
    Some of you know I've been chasing a starter problem. Turns out it was the starter switch. No continuity. This particular switch was bought from YT last summer. No rant here, just facts. In fact, I bought the same switch again today from YT.

    I have the internal switch contacts beside me as I type this.

    The lower contact, next to the engine looks sooty, like a well-used contact should, a little melted plastic on one contact.

    The upper contact, next to the button, has been molten. The brass contacts look normal in wear and color, but are sunken and out of line.

    Boys, this thing got hot, and honestly I can't think of anything that would cause it but operator error in cranking to long. If am a wrong, please correct me.

    Thanks for reading,

    Dave Smith    Posted 02-24-2018 at 14:35:14 [URL] [DELETE]        [Reply] [Email]  
  • Re: starter button autopsy result
  • I got one from TS. I used it once and the thing gave off a big flash.
    And would not shut off. I had to disconnect the battery to get it
    to stop engaging the starter. I took it back to TS and the guy there
    told me that was the 3rd one they had returned.
    Dave <*)))><

    Mark    Posted 02-24-2018 at 10:07:41 [URL] [DELETE]        [Reply] [Email]  
  • Re: starter button autopsy result
  • Tony, Congrats on finding the problem. Agree with JMOR on the importance of a quick, tight connection. Might take a little more if your surgical skill to measure what it takes to slam that new switch together tight. Pennies or nuts (think Iím partial to the nut as you can measure and fit...no way for it to come off) to ensure youíre not unintentionally welding inside the switch with an arcing connection...good luck!

    duey    Posted 02-24-2018 at 11:20:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: starter button autopsy result
  • As you no doubt know from talk about Ignition Resistors, all resistance creates Heat... and also causes reduced power to the starter. Poor contact (resistance) and high current flow will quickly heat things so it is no surprise to see some melting of components..

    As suggested below, a good, firm thumb pressure on the button is good practice.

    Have fun!!

    BlasterStumps    Posted 02-24-2018 at 09:48:43 [URL] [DELETE]        [Reply] [Email]  
  • Re: starter button autopsy result
  • Good work Tony. Glad to read that you were able to track down the problem. Cool.

    Peter MacInnis    Posted 02-25-2018 at 12:39:31 [URL] [DELETE]        [Reply] [Email]  
  • Re: starter button autopsy result
  • I had starter contacts weld shut one time with a large diesel engine. The root cause for that one was a old battery that would charge but had no punch left in it. Disconnecting a 400Kw Diesel when the starter is engaged was no fun. The battery swelled when I finally got it disconnected. I was wearing proper PPE and breathing apparatus at the time, what a rush. Battery testing with a tester on a regular basis would reduce the risk

    JMOR    Posted 02-24-2018 at 09:39:31 [URL] [DELETE]        [Reply] [No Email]  
  • Re: starter button autopsy result
  • Unlike a fast slamming solenoid or a spring loaded over center switch, these rely on you hand for both speed of closure & contact force. 'an easy hand with a light touch' is not gong to be good for it

    Bruce (VA)    Posted 02-24-2018 at 07:49:46 [URL] [DELETE]        [Reply] [Email]  
  • Re: starter button autopsy result
  • You had a defective switch. And likely just bought another one.

    Bruce(OR)    Posted 02-23-2018 at 23:35:57 [URL] [DELETE]        [Reply] [No Email]  
  • Re: starter button autopsy result
  • I did the wife's Fergy and ran a smaller wire, 12Ga? from the starter button up to an automotive Ford Starter solenoid to activate the starter. My thinking is the starer button should last longer than the solenoid. The solenoid being easier to replace.

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