davbell22602
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I still say its a carb issue.
Craftsman LT4000 spitting/sputtering and backfiring after riding for 5mins
- Thread starter cjones636
- Start date
Would the valves cause this too? If i had a filler gauge i would check and see if they needed adjusted.. I Already eliminated everything else as the cause except the valves and carb... Everyone online keeps telling me it the carbs, everyone in the real world (lol) keeps telling me other things that i've already checked. I Guess there is one way to find out, is to take the dang carb off tomorrow and clean it.
Today i took the carb off and i was surprised to see how very clean it was on the inside, it looked brand new! But i did notice something strange with the float. Isn't the float supposed to lay level when i have the carb up side down? Because if it is, mine is not!!! it's way off!
After giving it a cleaning, it's still doing the same thing!
After giving it a cleaning, it's still doing the same thing!
Fish
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I say you have something floating in the tank or collapsing fuel lines that intermittently shut of fuel flow. Run it again until it starts acting up with the hood off, then quickly pull the fuel line off at the carb and crank, carefull of the pulsing fuel!.
davbell22602
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I'd drain gas tank, clean it out real good. Then replace fuel lines and fuel filter. If it didnt have a fuel filter then add one in the fuel line.
Did that today...
Replaced fuel lines, Cleaned tank, added a new filter (air and fuel), rebuilt carb.... Still done the same thing..... But, as soon as it went dead i jumped off the mower and checked the spark again, and the spark was orange, not blue!
davbell22602
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Sounds like coil has short in it or going bad. Check air gap on coil and make sure its .010.
I Don't have a Filler gauge, but i used a business card to set the gap a week back.. You know of a fool-proof way to test the coil?
I Tested my coil with my multimeter set at 20k ohme iron core to the tab on the coil (the wire coming from the engine connected to the coil) on the coil and the reading stayed at 1.. Than i tested the coil from the iron core to the spark plug wire and it was 9.3. Started the engine and let it ran for 5 min before going dead, than i immediately tested it again and i got the same reading from the iron core to the tab, but this time from the iron core to the spark plug wire i got over 11.xx (i think it was 11.43).
I Got to thinking this moring when i was sawing up wood and getting it busted up, if the coil is going bad, how am i able to run it for so long by just moving the throttle down just a **** hair off the the rabbit? My cousin and another guy told me that it sounds like its using up the gas faster than it should, and that the float should be laying parallel at by holding the carb at a slight angle, and barely sink into the carb when i hold the carb perfectly horizontal. Mine does neither!
Here is some images i took the other day of the carb.
Here is some images i took the other day of the carb.