March 2013, 675 hours, Low compression, blow by @ rings & two leaking intake valves.  Major issue is with baked carbine on pistons, stuck rings and oil starvation @ top of heads.  New pistons and new hallow rod & valve system assem.  Need control of mixture so we are going with Rotec TBI, dropping Bing.  Will report.

Views: 575

Comment

You need to be a member of Zenith Aircraft Builders and Flyers to add comments!

Join Zenith Aircraft Builders and Flyers

Comment by Randy Jensen on April 8, 2013 at 4:54pm

there is an article in kit plane mag , with in past 6 months . to do with cowling pressure . there should be 8 inches difference in pressure between intake and exit . they diagrammed the test method using clear plastic tube led from cavities to cockpit -2 separate tubes , in the cockpit make a vertical U in each tube . tape them to a ruler and pour water in each till levels are equal . go flying and adjust inlet and outlet untill you get 8" . it will probably get you think ing about in flight adjustable openings

Comment by Randy Jensen on April 8, 2013 at 2:18pm

l sure appreciate engine reports and pictures . hope the new system gives you the mixture control you are hoping for

Comment by Mark Maltais on April 7, 2013 at 8:58am

WOW, that's a lot of issues at 675 hours. Any thoughts on a main cause?

New from Zenith:

Zenith Planes For Sale 
 

Classified listing for buying or selling your Zenith building or flying related stuff...


Custom Instrument Panels
for your Zenith
:

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.


Zenith Homecoming Tee:


Zenair Floats


Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz


Builder & Pilot Supplies:

Aircraft Insurance:

 
 

West Coast USA:

 
Pro Builder Assistance:

 

Transition training:

Lavion Aero

K&S Aviation Services

Aircraft Spruce & Specialty for all your building and pilot supplies!

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

© 2024   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service