ZDZ & RCS Support Direct support from Mike Dooley of RC Showcase for all your ZDZ and RCS Engine questions.

Problem getting my ZDZ40 to stay running

Reply
Old 11-08-2006, 09:58 AM
  #1
Rainman-ACRF
Thread Starter
 
Rainman-ACRF's Avatar
 
Join Date: Oct 2003
Location: Watford, UNITED KINGDOM
Posts: 159
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Problem getting my ZDZ40 to stay running

Hi,

I've got a brand new ZDZ40 which I'm setting up for the first time. I can get it to start pretty easily, but it only runs for a second and then dies. Here's my starting proceedure :-

1. Ignition off
2. Choke the carb and open the throttle half-way
3. Flip it over half a dozen times
4. Unchoke the carb and return throttle to just above idle
5. Ignition on
6. Flip it and it starts

I can start it really easily, every single time, but it only runs for a second or two and then just dies. I've tried:-

Leaving the throttle at different positions (upto half way, no more).
Starting the model with the choke still on and off.
I've leaned the L needle 1/8 turn

None of the above make any difference to starting - it will always start - really really easily. It just won't stay running. I've just the fuel line and there are no bubbles in the fuel line after it stopped. As it runs up it sounds great and doesn't splutter or anything, just a little smoke, just as you'd expect. I currently have a Bolly 21x8 on it and the battery is good.

I'm sure it's something simple but I'm stumped. Any help would be greatly appreciated.

Thanks,

Phil

Rainman-ACRF is offline  
Reply With Quote
Old 11-08-2006, 10:19 AM
  #2
MarksLHS
 
Join Date: May 2005
Location: Pittsburgh, PA
Posts: 21
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Problem getting my ZDZ40 to stay running

Sounds like your set up to lean. Try opening the low end first.
MarksLHS is offline  
Reply With Quote
Old 11-08-2006, 11:05 AM
  #3
Mike Dooley/RCS
 
Join Date: Jul 2002
Location: MD
Posts: 515
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Problem getting my ZDZ40 to stay running

Start your L needle at 2 turns out. Keep me posted.
Thanks!
Mike Dooley/RCS is offline  
Reply With Quote
Old 11-08-2006, 11:53 AM
  #4
Rainman-ACRF
Thread Starter
 
Rainman-ACRF's Avatar
 
Join Date: Oct 2003
Location: Watford, UNITED KINGDOM
Posts: 159
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Problem getting my ZDZ40 to stay running


Quote:
ORIGINAL: Mike Dooley/RCS

Start your L needle at 2 turns out. Keep me posted.
Thanks!
OK, well the L needle setting is at it came from the factory because taking my adjustment into account and counting the clockwise turns to tighten it, it was exactly 1.5 turns out.

I've now set it 2 turns out and it runs fine now.

This is only my second gas engine and I knew they were very sensitive to mixture adjustments but I never thought that 1/2 turn would be the difference between success and failure. I knew it was something simple but I guess I just put too much faith in the factory settings - but when things aren't working then you go with what you have and if the instructions say 1.5 turns then that is where you start.

Thank you so much !

Phil
Rainman-ACRF is offline  
Reply With Quote
Old 11-09-2006, 07:03 AM
  #5
Rainman-ACRF
Thread Starter
 
Rainman-ACRF's Avatar
 
Join Date: Oct 2003
Location: Watford, UNITED KINGDOM
Posts: 159
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Problem getting my ZDZ40 to stay running

OK, one last question :-

My engine start easily from cold and runs great. However, restarting a warm engine is a nightmare.

Whether I stop the engine by closing the throttle or killing the ignition, I can't get it start up again. If I leave it for 15 minutes, it will start again nice and easy. Seems like it might be flooding when I stop the engine. Excuse my ignorance, but is this a symptom of maybe running a little too rich?

Any ideas or tips to avoid flooding and make restarting easier?

Thanks again,

Phil
Rainman-ACRF is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
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 -8. The time now is 02:54 PM.