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  #1  
Old 07-11-2013, 03:28 PM
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Default k241 back fire

Hey guys. I just got my k241 into my pulling tractor. And I adjusted the carb and it idles fine. Once I get to half throttle it back fire and kills everything. The only thing done to it is .040 off the head. What could be my problem??
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Old 07-11-2013, 03:36 PM
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Sticking intake valve, intake valve not sealing, timing incorrect, timing may need advanced because of higher compression, running too lean......... your going to have to do some diagnosis. Way too broad of a question. Backfire through the intake is usually too lean. Backfire through the exhaust is too rich. MORE INFO PLEASE!
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Old 07-11-2013, 03:47 PM
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could be an ignition issue to. do you have the stock coil on it? there's a + & - on the coil. - side should go to the points and the condenser should be on the - also.
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Old 07-11-2013, 03:55 PM
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the its got the stock coil. and it back fires out of the stack
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Old 07-11-2013, 04:01 PM
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i dont know if this will help. but the high speed needle 2 turns out and the idle mixture needle is 2 1/2 turns out
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Old 07-11-2013, 04:02 PM
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Check your carb settings. Go through the manual and set the carb up as it describes.
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Old 07-11-2013, 04:07 PM
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thats what it told me to set it to. i dont know it idle fine. just when i give it some throttle it dies and kills my electric. my flick switch wont even glow
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Old 07-11-2013, 04:11 PM
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Check your grounds and other electrical connections.
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Old 07-11-2013, 04:15 PM
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Quote:
Originally Posted by Plowboy1086 View Post
i dont know if this will help. but the high speed needle 2 turns out and the idle mixture needle is 2 1/2 turns out
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Originally Posted by Plowboy1086 View Post
thats what it told me to set it to. i dont know it idle fine. just when i give it some throttle it dies and kills my electric. my flick switch wont even glow
These are just "preliminary" settings ..... you have to tune it to suit your engine. It's not a "set it and leave it" setting... If it's backfiring out the stack TURN THE FUEL DOWN and see if it helps.
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Old 07-11-2013, 04:35 PM
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ok will do thanks
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