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

Carbon Buildup on my ZDZ 80

Reply
Old 01-18-2006, 03:24 PM
  #1
sschwell
Thread Starter
 
Join Date: Oct 2002
Location: Austin, TX
Posts: 37
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Carbon Buildup on my ZDZ 80

Mike:

A little while back I emailed you about the carbon buildup on my ZDZ 80. I think you said that some carbon was normal but that it shouldn't be building up around the exhaust port. Anyways here is a picture of my engine with the muffler removed. Note the buildup around the exhaust port. The piston has a light buildup. The top of the piston has considerable build up. The cylinder wall is clean. The engine has always been run on Mobil MX1 2T (30:1 for break in and 40:1 since). I'm surprised at the amount of buildup given that I only have about 10 gallons through this engine. The engine runs great, starts easy, idles well and has lots of power. I'd like to keep it that way. Please let me know what you think. Is this a normal buildup? If not does it indicate a hot running engine? Your help is most appreciated.


sschwell
Attached Thumbnails
Click image for larger version

Name:	Yw68110.jpg
Views:	13
Size:	64.6 KB
ID:	390147  
sschwell is offline  
Reply With Quote
Old 01-18-2006, 03:38 PM
  #2
Mike Dooley/RCS
 
Join Date: Jul 2002
Location: MD
Posts: 515
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Carbon Buildup on my ZDZ 80

What you are showing me could be a hot running engine, and it appears your muffler is loose with alot of leakage?? Be sure the carb has a cool air supply(no ram air!) and the exit air opening uses a spoiler. Typical CHT should range from 190-220F.
Keep me posted.
Mike Dooley/RCS is offline  
Reply With Quote
Old 01-18-2006, 05:22 PM
  #3
sschwell
Thread Starter
 
Join Date: Oct 2002
Location: Austin, TX
Posts: 37
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Carbon Buildup on my ZDZ 80

Thanks Mike- much appreciated.

sschwell 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 01:01 AM.