Carb or Spark?

Question for Fix My Hog

I just had the S&S super E carb on my 84 Sportster XLH 1000. I was just riding it and and she was running like a dream then all of a sudden and in the worst it could happen. My bike started sputtering and died on me. Now she won’t start. New plugs.customer has this to add: Well it seems once the bike cools down she starts right up. My guess is she dies once she gets hot and won’t start. Like it’s not getting any spark to the plugs.

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Fix My Hog Answers

Often, a failing coil or ignition will work fine until the unit gets hot. You need to determine if you are losing spark. Verify that the issue is not fuel related. We also suggest that you test your charging system.


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CHARGING SYSTEM
COIL
CARB

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4 Responses to “Carb or Spark?”
  1. Tim Kennedy
    Tim Kennedy

    Check for short,move wires around to see if fire returns,this will get you home…if so trace wires to find short.. when carb was installed a wire may have been pinched. You being a person of advanced intelligence ,I am sure you are not out of gas given the extreme range of mileage sportsters have ….

    Reply
  2. Ro Templeton
    Ro Templeton

    Oil pressure question…Have a 91 fatboy 1340 S&S EVo ,she starts fine oil pressure @45 psi cold start then 5 miles down the road pressure @20 get to a stop Idle pressure @0 psi take off no pressure at all ,oil comes to the tank but dosent leave the tank it builds up ,let it sit for awhile start it up again have 40 psi pressure oil leaves the tank and 5 Mike’s down the road same thing losses pressure and back to 0 again I even put a different spring in the pump to give me more pressure but same thing happens …I’ve had this bike for 13 years has a S&S oil pump I’ve rebuilt it a couple of times but never replaced the body just gears ,has a new reusable filter, new lines ,and tapper screen is good ,do I need to replace the pump itself ?

    Reply
    • Customer Service
      Customer Service

      Hello,
      Here’s what the experts had to say about your question:

      You can’t rely too much on an oil pressure gauge for a Harley Davidson Big Twin engine. Usually hot oil pressure for your Evo would only be around 3psi. It is important to have a functional oil indicator light. If this light illuminates while riding; then you need to be concerned.
      Verify that you have oil lines routed correctly.

      https://www.fixmyhog.com/post/in-the-shop-evolution-oil-pump/

      Please let us know if you have any further questions
      Sincerely,
      Danesha
      Fix My Hog Video Membership

      Reply