Recent content by Jim's cart

  1. J

    Engine tuning help

    I have not worked out how to add pics yet. I had it running this morning for five minutes, if that and idling mainly, no load at all, and the engine was very hot again.
  2. J

    Engine tuning help

    The plug looks good. I made up new fuel today and it went well for about twenty minutes, then it seemed to run out of fuel and would not start. Does a fuel vapor lock seem possible? The engine gets very hot for only twenty minutes of run time.
  3. J

    Engine tuning help

    It is only a new engine, so i assume it is jetted correctly. I really haven't been able to get it to run yet, it would do a few laps of the house and then it seemed to be bogging down until it stopped. This was during some 40 degree days, so I thought it was something to do with the high ambient...
  4. J

    Engine tuning help

    I haven't cleaned the carby as the engine has only done about 4 hours running. I have had the fuel bowl off the carby and there wasn't anything in it.
  5. J

    Engine tuning help

    The plug was looking very brown and dry, so I have increased the oil in fuel mixture, I think a little too much as it is blowing a fair bit of smoke at the moment. The carby only has one mixture screw and I have tried just about everywhere to get it to rev.
  6. J

    Engine tuning help

    Hi, I am new to the group. I have a homemade go-cart I have made for my boys to ride around our yard. I have put a 49cc engine onto it but am having trouble getting it to fully rev out, no matter how I adjust mixture screw on carby. It is the 49cc "race engine", I have put a performance exhaust...
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