Go Back   DIY Go Kart Forum > Building Plans And Advice > Engines & Clutches

Notices

Closed Thread
 
Thread Tools Display Modes
  #1  
Old 08-17-2019, 10:54 AM
Wotb_Beast Wotb_Beast is offline
Junior Member
 
Join Date: Aug 2019
Location: Pennsylvania, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default why wont my predator 212 idle down when the screw is turned?

hi,

so my kart runs a predator 212 hemi and when I start it it takes off and I have to hold it back. I read online that the idle is to high and the clutch is engaging and kicking it forward

well I started the engine and I turned the screw to the left to idle it down but it didn't change anything


thanks for stopping and I hope you can help me
pic of my carb below or something sim but the black screw is the same

untitled.png
  #2  
Old 08-17-2019, 11:04 AM
Tpdingo Tpdingo is offline
Senior Member
 
Join Date: Nov 2017
Location: Bellmore, NY
Posts: 903
Thanks: 13
Thanked 258 Times in 217 Posts
Default

Push the butterfly valve with your finger while you turn out it is possible it got stuck in the fully in position. This worked for me.
__________________
Give a wrench long enough and WD-40, and I can remove the world's rusty bolts.
  #3  
Old 08-17-2019, 11:57 AM
Mrmonk7663 Mrmonk7663 is offline
Senior Member
 
Join Date: May 2019
Location: Houston, Texas
Posts: 456
Thanks: 113
Thanked 83 Times in 67 Posts
Default

Sounds like you need a stronger return spring possibly.
  #4  
Old 08-17-2019, 01:22 PM
Wotb_Beast Wotb_Beast is offline
Junior Member
 
Join Date: Aug 2019
Location: Pennsylvania, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

the engine is brand new and is run every 3 months and is inspected before so I dont see it being stuck
  #5  
Old 08-17-2019, 01:54 PM
Dingocat's Avatar
Dingocat Dingocat is offline
Broke
 
Join Date: Apr 2018
Location: Cleveland Ohio
Posts: 455
Thanks: 34
Thanked 98 Times in 82 Posts
Default

Quote:
Originally Posted by Wotb_Beast View Post
the engine is brand new and is run every 3 months and is inspected before so I dont see it being stuck
Just try it, just becausenit was inspected before doesn't mean everything's perfect.
__________________
If it's not scary you're not going fast enough
  #6  
Old 08-17-2019, 05:17 PM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,905
Thanks: 903
Thanked 1,889 Times in 1,563 Posts
Default

Did you loosen the throttle plate nut??
And if anything you should have a return spring attached to the throttle arm anyways...so it has positive return...

ALso check the throttle cable, see if it has something making a slow return or rust ect...
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
  #7  
Old 08-20-2019, 08:34 PM
Wotb_Beast Wotb_Beast is offline
Junior Member
 
Join Date: Aug 2019
Location: Pennsylvania, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

ill try
  #8  
Old 08-22-2019, 12:25 PM
Wotb_Beast Wotb_Beast is offline
Junior Member
 
Join Date: Aug 2019
Location: Pennsylvania, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

i looked in my carb today and none of the flaps are stuck and its mooving fine
  #9  
Old 08-22-2019, 07:56 PM
motor gauntlet motor gauntlet is offline
Junior Member
 
Join Date: Aug 2019
Posts: 17
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Wotb_Beast View Post
i looked in my carb today and none of the flaps are stuck and its mooving fine
If you can try adjusting the air fuel mix if its to rich or to lean it could cause a high idle speed. If not check for vacuum leaks in and around the carb.

---------- Post added at 08:56 PM ---------- Previous post was at 08:05 PM ----------

Quote:
Originally Posted by Wotb_Beast View Post
hi,

so my kart runs a predator 212 hemi and when I start it it takes off and I have to hold it back. I read online that the idle is to high and the clutch is engaging and kicking it forward

well I started the engine and I turned the screw to the left to idle it down but it didn't change anything


thanks for stopping and I hope you can help me
pic of my carb below or something sim but the black screw is the same

Attachment 111016
check gaskets around the carb if even one carb related gasket or seal is faulty it's going to run lean an idle high.
  #10  
Old 08-22-2019, 02:40 PM
bob58o's Avatar
bob58o bob58o is offline
Assistant to the Manager
 
Join Date: Jan 2016
Location: Chicago-town USA
Posts: 7,528
Thanks: 3,232
Thanked 2,256 Times in 1,746 Posts
Default

How can the engine be both brand new and also ran every 3 months?
Is there a governor still hooked up?
Have you messed with the linkages at all?
Did you loosen the nut atop the the throttle lever on the throttle plate like Kutzy suggested?

Show pictures of your own carb as it is hooked up. Many pictures. Lots of angles. Including the linkage.
__________________
There are two types of people. Those who can extrapolate from incomplete data
  #11  
Old 08-23-2019, 04:17 PM
Wotb_Beast Wotb_Beast is offline
Junior Member
 
Join Date: Aug 2019
Location: Pennsylvania, USA
Posts: 14
Thanks: 4
Thanked 1 Time in 1 Post
Default

I figured it out my engines idle is already as low as it will go and my clutch was bought for a older less powerful engine and thats why it wont change idle
  #12  
Old 08-23-2019, 04:41 PM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,905
Thanks: 903
Thanked 1,889 Times in 1,563 Posts
Default

We need to see some pics of the throttle setup...
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Closed Thread

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 03:46 PM.