[NSRCA-discussion] Engine problem

[Earl Haury]

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

     


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    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



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