Go cart takes off when started

[Jmcdade0003]

I bought a go cart from someone and it needed a new clutch. I figured the clutch was why the cart started to take off when started but that is not the case. Any ideas as to what it could be? It's ok when it's started and the lever is in the start position, but as soon as I push the lever into the run position, it goes.

 

[redflash]

Idle is set too high...most likely !

Da Flash

 

[Jmcdade0003]

I cant find it. Are all engines supposed to have one?

 

[Denny]

Your going to have to look around. It will be near the throttle linkage. It will be a spring with a screw going through it. Make sure you have slack in your throttle cable also.

 

[jmaack]

Black plastic screw on top of carb presses against throttle shaft.

 

[panchothedog]

you're more than likely going to have to remove the air cleaner to be able to find it

 

[CEB]

Your going to have to look around. It will be near the throttle linkage. It will be a spring with a screw going through it. Make sure you have slack in your throttle cable also.

Lmao +1 on the slack-tightened my kids throttle cable ,he drove it 1 lap hit the kill switch and told me to fix it.I was like"Holy crap that looks fast from here" while i was walking back after the adjustment......yeah it wasnt just my imagination.lol

 

[madprofessor]

It's ok when it's started and the lever is in the start position, but as soon as I push the lever into the run position, it goes.

Start/Run is your choke lever. What you're saying is that you're starting it up with the choke on (start position), and when you turn the choke off (run position) the motor then revs up higher. High enough to engage the clutch. If it ran lower rpms when the choke was still on, then you can afford to back off of the idle screw for the carb when in the run position, lowering the rpms to what they were with the choke on.
Watch what moves back and forth on the carb as you press/release the gas pedal (not cranked up of course). When you release the pedal, a moving part should hit a screw somewhere that stops it from moving any further. That's your idle screw.
BTW: Same is true when you floor it, a moving part should hit a screw somewhere that stops it from going any further. That's your throttle limiting screw.