Questions and Answers If you have general RC questions or answers discuss it here.

Zenoah 20 ei ignition problem ?

Reply

Old 09-04-2010, 10:07 AM
  #1  
sylo26
Member
Thread Starter
 
Join Date: Apr 2007
Location: Valdor, QC, CHAD
Posts: 63
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Zenoah 20 ei ignition problem ?

Hi guys ! My motor , when he's coming hot after 2 min just drop his speed slowly and kill an never start again ; just start after he's cold . I tried to ajust needles and nothing change . I would like to know if it could be the ignition system . I use a 2100 nimh battery . What do you think about that ? Thanks ! Paul
sylo26 is offline  
Reply With Quote
Old 09-04-2010, 06:56 PM
  #2  
scale only 4 me
My Feedback: (158)
 
scale only 4 me's Avatar
 
Join Date: Jan 2002
Location: Avon Lake, OH
Posts: 9,901
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

Paul,,
there are so many variables,
Make sure there are no air leaks
Is the air flow over the engine good?
What gas/oil ratio are you running?

2100 battery is fine and way more than you need

You should post this question here too http://www.rcuniverse.com/forum/foru...smode_1/tt.htm
scale only 4 me is offline  
Reply With Quote
Old 09-06-2010, 07:12 AM
  #3  
jetmech05
 
Join Date: Jul 2005
Location: Jacksonville, FL
Posts: 4,855
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

Does it smell hot?
If you have good airflow, then it's either the mixture (gas to air ratio) or the fuel/oil mixture. Most of the guys I fly with break in on an ashless oil at 32:1 for a couple of gallons, then switch to a good synthetic like Redline or Royal Purple at 40:1. I know some oils say you can run as high as 100:1....but given the choice I'll save my motors and run at 40:1.
For airflow you must have an exit for air on your cowling....they say the exit is supposed to be 3 times the entrance area...I break that rule alot.....I run maybe 2 depending on the model.....
Airflow is like water it will take the path of least resistance so you need an open area in front of the cylinder and an exit aft of the cylinder.....If the exit is too small then airflow will dam up forming positive pressure letting no more air in and then will heat up as well.
Good airflow may require you to damn up an entrance into the cowl to force air over the cylinder...
Good Luck
jetmech05 is offline  
Reply With Quote
Old 09-06-2010, 07:22 AM
  #4  
jetmech05
 
Join Date: Jul 2005
Location: Jacksonville, FL
Posts: 4,855
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

sorry duplicate post
jetmech05 is offline  
Reply With Quote
Old 09-06-2010, 11:11 AM
  #5  
sylo26
Member
Thread Starter
 
Join Date: Apr 2007
Location: Valdor, QC, CHAD
Posts: 63
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

Thanks for responses guys . I trie with no cowling and its the same . But maybe it could be my mixture . I started to use synthetic oil after 2 gallons of mineral oil and I put 3.5 onces in one gallon of gaz, is it good ? Thanks ! Paul
sylo26 is offline  
Reply With Quote
Old 09-07-2010, 06:52 PM
  #6  
jetmech05
 
Join Date: Jul 2005
Location: Jacksonville, FL
Posts: 4,855
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

That's a fuel/oil mix of 36.5 to 1 which is good....with no cowling...it has to be the fuel air mixture....you're too lean..if that's not that then there is something wrong with a bearing.
jetmech05 is offline  
Reply With Quote
Old 09-08-2010, 04:09 PM
  #7  
sylo26
Member
Thread Starter
 
Join Date: Apr 2007
Location: Valdor, QC, CHAD
Posts: 63
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Zenoah 20 ei ignition problem ?

Yes , I change my gas line to be sure don't have air in it , tried differents needles ajustment , and no result . I think I'll have to cheak the bearings . Thanks ! Paul
sylo26 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