Go Back   DIY Go Kart Forum > Building Plans And Advice > Go Kart Discussion

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 08-19-2019, 05:42 PM
Michjay Michjay is offline
Junior Member
 
Join Date: Aug 2019
Posts: 5
Thanks: 0
Thanked 1 Time in 1 Post
Default Takes off when starting

So I have inherited a go cart with a Tecumseh engine for my kids. Really don't know anything about it. It does have a centrifugal clutch. When I start it with the choke on starts first pull, I turn the choke off/open and watch out its gone. Thank God for a chair and my Honda 450 to stop it. What could be causing this thought maybe idle to high but don't see a screw in the carb. What other things could be causing it to do this?
Reply With Quote
  #2  
Old 08-19-2019, 06:16 PM
Hellion's Avatar
Hellion Hellion is offline
Disc brakes'r for cowards
 
Join Date: May 2016
Location: Location: Location:
Posts: 4,607
Thanks: 1,606
Thanked 1,329 Times in 1,084 Posts
Default

Idle could be way too high, engaging the clutch right as you start it...

Or the clutch could be seized/frozen and basically one piece. Can you freely rotate the outer 'bell' end separately from the inner portion (the part that is attached to the engine's crankshaft)?

---------- Post added at 08:16 PM ---------- Previous post was at 08:06 PM ----------

I recommend this guide for centrifugal clutch users. Taught me a few pointers...

10 Things to Know about a Centrifugal Clutch
https://www.bmikarts.com/10-Things-a...rifugal-Clutch
__________________
"I'm just here for the gasoline"
Reply With Quote
  #3  
Old 08-19-2019, 06:33 PM
Joe-405's Avatar
Joe-405 Joe-405 is offline
2018 Buildoff Winner ! 😎😎
 
Join Date: Mar 2014
Location: Oklahoma
Posts: 2,313
Thanks: 625
Thanked 904 Times in 688 Posts
Default

As long as you can push it around on the ground freely then the clutch is not stuck. Only other thing is idle.
Reply With Quote
  #4  
Old 08-19-2019, 06:42 PM
mckutzy mckutzy is offline
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,347
Thanks: 812
Thanked 1,753 Times in 1,447 Posts
Default

Ahh.... maybe the throttle cable is stuck a bit, so as to pull it open and then it takes off... Happened to me...

As per my usual statement....... pics of your ride..
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Reply With Quote
  #5  
Old 08-19-2019, 06:51 PM
Hellion's Avatar
Hellion Hellion is offline
Disc brakes'r for cowards
 
Join Date: May 2016
Location: Location: Location:
Posts: 4,607
Thanks: 1,606
Thanked 1,329 Times in 1,084 Posts
Default

I agree with those other two guys ☝️

Totally plausible.
__________________
"I'm just here for the gasoline"
Reply With Quote
  #6  
Old 08-20-2019, 06:26 AM
Karttekk Karttekk is offline
Senior Member
 
Join Date: Jul 2014
Location: Elizabeth, PA
Posts: 583
Thanks: 18
Thanked 139 Times in 119 Posts
Default

Always start up a kart with either the parking brake applied (if equipped) or against a tree, a wall or put blocks in front of the wheels. Just basic safety practices.
Reply With Quote
The Following User Says Thank You to Karttekk For This Useful Post:
Hellion (08-22-2019)
  #7  
Old 08-20-2019, 08:20 AM
Jakebleazard75@gmail.com's Avatar
Jakebleazard75@gmail.com Jakebleazard75@gmail.com is offline
That guy
 
Join Date: Dec 2018
Posts: 80
Thanks: 37
Thanked 3 Times in 3 Posts
Default

I had this happen to me. I would pull the starter, it would fire up and take off making a a weird noise. But when I oiled the clutch, it worked fine! So if the clutch isnít frozen, try that. Just squirt a bit of oil in the gap between the C-clip that holds on the clutch bell. This is something you should be doing to maintain the clutch. Be sure to oil it regularly.
__________________
Just keep hitting it, it will fit eventually
Reply With Quote
  #8  
Old 08-20-2019, 04:27 PM
Michjay Michjay is offline
Junior Member
 
Join Date: Aug 2019
Posts: 5
Thanks: 0
Thanked 1 Time in 1 Post
Default

Thanks guys for the responses will be able to look at it Tomorrow will keep posted
Reply With Quote
  #9  
Old 08-21-2019, 05:34 PM
Michjay Michjay is offline
Junior Member
 
Join Date: Aug 2019
Posts: 5
Thanks: 0
Thanked 1 Time in 1 Post
Default

Here are a few pics of the kart it don't seem like its idle high, clutch looks as its engaging as soon as I open the choke hence the take off . I'm lost
Attached Thumbnails
image2(1).jpeg   image3.jpeg  

image4.jpeg   image1(2).jpeg  

Reply With Quote
  #10  
Old 08-22-2019, 01:25 AM
landuse's Avatar
landuse landuse is offline
Moderator
 
Join Date: Nov 2010
Location: Pietermaritzburg, South Africa
Posts: 17,234
Thanks: 2,060
Thanked 3,410 Times in 2,778 Posts
Default

Quote:
Originally Posted by Michjay View Post
Here are a few pics of the kart it don't seem like its idle high, clutch looks as its engaging as soon as I open the choke hence the take off . I'm lost
Did you look at any of the advice that was posted above? Did you check to see if it was any of the things mentioned?
Reply With Quote
  #11  
Old 08-22-2019, 08:07 AM
Hellion's Avatar
Hellion Hellion is offline
Disc brakes'r for cowards
 
Join Date: May 2016
Location: Location: Location:
Posts: 4,607
Thanks: 1,606
Thanked 1,329 Times in 1,084 Posts
Default

Seriously; heed and obey our South African moderator—he speaks wise words.

All the other suggestions aside, your engine photos confuse me.
I see two cables near the carburetor. One appears properly attached to the governor control arm (which is the true throttle control of a governed engine) but I can’t see where the other cable terminates or what it’s attached to. ???


I think your problem might be that the throttle is always open/slightly open and not closing to idle. Could be binding in the throttle cable, a seized (rusted, corroded) or rough throttle cable or a missing return spring or one that is not strong enough to close the throttle all the way down to idle (when the pedal is released).
You must assure that when the pedal is relaxed, there’s no tension in the cable especially at the governor/throttle end.

*Oil the clutch bushing (like that guy said)! You might just have a roasted clutch that’s basically engaged all the time.

How fast does this kart take off after you start it? Is it going like a bat out of Hades?
__________________
"I'm just here for the gasoline"
Reply With Quote
  #12  
Old 08-22-2019, 08:45 AM
Karttekk Karttekk is offline
Senior Member
 
Join Date: Jul 2014
Location: Elizabeth, PA
Posts: 583
Thanks: 18
Thanked 139 Times in 119 Posts
Default

Watch this video and set yours up as shown.

Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 10:25 AM.