Gas Engines Questions or comments about gas engines can be posted here

DLE Thr. arm spring

Reply

Old 04-15-2019, 06:01 AM
  #1  
Stick 40
Thread Starter
 
Join Date: Jun 2003
Location: quincy, MI
Posts: 1,205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default DLE Thr. arm spring

I bought a Ultra stick lite , with a DLE 20 on it. The DLE never ran very well.I just put a new Carb. On it and it is running great.But I notice , there is a spring on the THR, arm on both carbs. I would like to disable the spring to cut down on battery draw. Just wondering if that will cause a problem?
Stick 40 is offline  
Reply With Quote
Old 04-15-2019, 06:54 AM
  #2  
mogman
 
mogman's Avatar
 
Join Date: Jan 2006
Location: Pitt Meadows, BC, CANADA
Posts: 843
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

On a lot of my planes I use a piece of kevlar cord (or similar) to open the throttle and let the spring on the carb close it.

Works very well. There is MINIMAL resistance leaving the spring on the arm.

If you do decide to remove the spring, just unhook it from the arm, but leave the spring in place. It helps to keep the throttle plate centered and stop vibration that causes wear on the throttle shaft.
mogman is offline  
Reply With Quote
Old 04-15-2019, 06:55 AM
  #3  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 6,587
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Disabling the spring won't create an issue as long as it is still there to apply a slight side load to the throttle plate. If the throttle plate is free to vibrate sideways it will create mixture fluxutions. I left the spring attached on my last tow gas engines. It really does not load the servo all that much and having it loaded did seem to give a little more positive throttle control.
speedracerntrixie is offline  
Reply With Quote
Old 04-15-2019, 11:38 AM
  #4  
Truckracer
My Feedback: (19)
 
Join Date: Apr 2004
Location: Des Moines, IA
Posts: 4,888
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Some years ago I published tests on how much current a servo draws holding against a throttle spring. The test involved a number of different servos and Walbro carb models. The conclusion was that a servo draws very little current while holding against a Walbro throttle spring. There is simply no reason to cut, disable or remove a throttle spring as there is nothing to be gained by doing so.
Truckracer is offline  
Reply With Quote
Old 04-15-2019, 02:08 PM
  #5  
Stick 40
Thread Starter
 
Join Date: Jun 2003
Location: quincy, MI
Posts: 1,205
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

good, thanks for the reply's. I will leave it .

I was trying to fix the first post with the sp and some how reposted. LOL
Stick 40 is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service