Go kart starts fine then simply won't run

[Lavastar889]

How did you clean the carb?
Spray stuff in the hole from a foot away?
or did you take it apart and inspect all the jets. Cleared out the Small Idle Circuit holes in the throat. Blew air through all passages?
Sounds like the idle Circuit is still clogged.

At first we just sprayed it with cleaner, that obviously didn't do much, so we unclogged the needle valve, took a small brass piece out with a very small passage(I don't know what it was for), stuck a pin through it to clean it. Then we took out this other small brass thing out that had like 15 tiny holes in the top of it, cleaned it out too. Put it back together and it started, ran, and idled just fine. We came back 4 hours later to find it doesn't even start.

 

[Master Hack]

We tried with gas spray bottle, it started, ran fine, but doesn't idle or start with battery cranking

Just outta curiosity, what is your battery voltage? Check it at rest and when cranking.

 

[Lavastar889]

Just outta curiosity, what is your battery voltage? Check it at rest and when cranking.

12 volts(sorry for the late response)

 

[Master Hack]

12 volts

I was looking for actual voltage, not what it says on the label.
A 12 volt battery in good condition and fully charged will be some what north of 12.6 volts. If you have "12 volts" at rest your battery is discharged.
so what does that have to do with your problem? Maybe nothing. However modern electronic ignitions are just voltage amplifiers. The more ya put in the more ya get out.
a discharged battery with 12 volts at rest may only have 10 volts when the starter is workin. Thats only 20% or so. 20%, may not matter if the engine is in perfect tune....

 

[Denny]

Everything you say and do says plugged up carb and dirty tank, lines and filter. Yet you refuse to listen us. Good Luck I’m out.

 

[Edwin Spangler]

Similar issue happened to me recently with a 4 wheeler Ive been working on. Few floaties in the tank that had been left partially open, filter looked clean, everything looked clean. Could start and idle when cold but after it warmed up, it would only start with WOT.

Long story short, it was the pilot jet that I refuse to admit was the problem. Pfff it still wasnt the problem, I aint wrong!
*Folds arms and runs away*

 

[Darren]

The long brass tube is the emulsion tube.
Old carbs gaskets can get a little brittle, needle valve can stick etc...
remove the fuel line and make sure you get a flow after the filter.
Once confirmed of fuel flow then it's time to look at the carb again.
Find out what carb it is then look at a service video on youtube.
If it starts with spray fuel, it's fuel related. If the choke is faulty, then cover 3/4 of the carb inlet to get the fuel in.
D

 

[Lavastar889]

Similar issue happened to me recently with a 4 wheeler Ive been working on. Few floaties in the tank that had been left partially open, filter looked clean, everything looked clean. Could start and idle when cold but after it warmed up, it would only start with WOT.

Long story short, it was the pilot jet that I refuse to admit was the problem. Pfff it still wasnt the problem, I aint wrong!
*Folds arms and runs away*

Do you remember how you located the pilot jet? Because we were messing around with something that looked similar but we weren't sure.

 

[Lavastar889]

Found the pilot and main jet, could anyone explain how you fine tune the pilot jet?(it screws in and out and it seems like from online that it's something that needs to be adjusted)

 

[Hellion]

You must also ensure that the fuel tank vents properly, whether it is gravity-fed or has a fuel pump. Usually there is a small hole in the fuel cap or in the top of the tank somewhere. If these are plugged and it sounds like they could be, the carburetor won't draw fuel and the engine will die.

If you're still storing it outside like the previous owner, that doesn't bode well for continued reliability. Cute adult sized buggy though...

Does not look easy to work on though.

 

[Lavastar889]

You must also ensure that the fuel tank vents properly, whether it is gravity-fed or has a fuel pump. Usually there is a small hole in the fuel cap or in the top of the tank somewhere. If these are plugged and it sounds like they could be, the carburetor won't draw fuel and the engine will die.

If you're still storing it outside like the previous owner, that doesn't bode well for continued reliability. Cute adult sized buggy though...

Does not look easy to work on though.

Previous owner bought it for their kid, one day it didn't start, so he decided to abandon it in their yard exposed. 4 years later I saw it while driving by and he was happy to give it to me for free.