[NSRCA-discussion] Engine problem

[John Ferrell]

I hate to bug Clarence with the problem. Since the engine runs well the only real problem is it slobbers on the airplane. 

I have a Lathe and Mill in the shop. Set up will be tricky, the plug is pretty deeply recessed. The risk to the threads by using a pilot rod in the hole is high.

I believe I will anneal a plug washer and try a little of the liquid gasket goo. If that don't solve the problem I will just accept the mess. 

John Ferrell    W8CCW
"My Competition is not my enemy"
http://DixieNC.US

  ----- Original Message ----- 
  From: Earl Haury 
  To: NSRCA Mailing List 
  Sent: Saturday, August 26, 2006 11:44 AM
  Subject: Re: [NSRCA-discussion] Engine problem


  John

  Assuming that the problem is lack of perpendicularity between the threaded hole and the gasket surface - find a "friend" that will set the thing up in a mill aligned on the threaded hole, then touch the gasket surface with a mill to square. (You might give Clarence a call also - unusual that he would not catch this.)

  Earl
    ----- Original Message ----- 
    From: John Ferrell 
    To: NSRCA Mailing List 
    Sent: Saturday, August 26, 2006 10:24 AM
    Subject: Re: [NSRCA-discussion] Engine problem


    The head & cylinder are all one part on the YS91AC. I was unable to remove the liner when the head was sent out for the helicoil. It is stuck pretty good. I can see a cascade of problems if I try to replace that part alone. Considering the price of a new engine I am reluctant to spend a lot on this one!
    Hopefully, someone will suggest a simple fix.

    John Ferrell    W8CCW
    "My Competition is not my enemy"
    http://DixieNC.US

      ----- Original Message ----- 
      From: William C. Harden 
      To: 'NSRCA Mailing List' 
      Sent: Saturday, August 26, 2006 10:48 AM
      Subject: Re: [NSRCA-discussion] Engine problem


      I suggest that you buy a replacement head because that is the only item you need.  In the future, if you have a stripped glow plug thread in the head then simply replace the head and avoid this kind of problem.  The heli coil method works, but it is better in my opinion to have a new head.  A new head really doesn't cost that much.  

       

      Bill

       


--------------------------------------------------------------------------

      From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell
      Sent: Saturday, August 26, 2006 9:44 AM
      To: NSRCA Mailing List
      Subject: [NSRCA-discussion] Engine problem

       

      General engine problem

      I have a YS91AC that runs fine but leaks fuel around the glow plug.

      It appears that the plug is not square to the head casting so the 

      copper gasket does not completely seal the joint. 

       

      Before I take the problem to my machinist son-in-law are there 

      any suggestions as to how I might resolve the problem?

       

      History:

      Bought engine at deep discount with damaged threads and had 

      Clarence Lee install helicoil insert. The first owner was full scale 

      engine mechanic so I expect the problem was from the factory.

       

      New YS110 is listed at $329, new head-cylinder/sleeve about $150.

      My personal threshold is not to spend more than 1/3 the price of a 

      new replacement in repair parts. 

      Ideas?

       

      John Ferrell    W8CCW
      "My Competition is not my enemy"
      http://DixieNC.US



--------------------------------------------------------------------------


      _______________________________________________
      NSRCA-discussion mailing list
      NSRCA-discussion at lists.nsrca.org
      http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


----------------------------------------------------------------------------


    _______________________________________________
    NSRCA-discussion mailing list
    NSRCA-discussion at lists.nsrca.org
    http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


------------------------------------------------------------------------------


  _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060826/2e53b9cd/attachment.html