YS-91 AC problem

[Mark Hunt]

Paul,

I just did this cleaning on my YS...that's why I was low on power at Temple.....full of carbon buildup on the exhaust port and valve...even in the start of the header.

I used a cotton burr for the dremel....usually used for polishing...however, I soaked the parts with carburetor cleaner and then got the big stuff with a #11 exacto blade....the rest, including the stained areas cleaned nicely with the cotton burr soaked in the carburetor cleaner...

Hope to see you at Jetero,
Mark
  ----- Original Message ----- 
  From: Paul Horan 
  To: discussion at nsrca.org 
  Sent: Thursday, June 02, 2005 8:50 PM
  Subject: Re: YS-91 AC problem


  Ken, 
      That's what I wanted to know too.   If there was an easier way.
  Thanks,
  Paul
    ----- Original Message ----- 
    From: Ken Thompson 
    To: discussion at nsrca.org 
    Sent: Thursday, June 02, 2005 8:45 PM
    Subject: Re: YS-91 AC problem


    Paul,

    I'm going to pull the head and drop the valves out to clean them.  Is there an easier way?

    Ken
      ----- Original Message ----- 
      From: Paul Horan 
      To: discussion at nsrca.org 
      Sent: Thursday, June 02, 2005 9:29 PM
      Subject: Re: YS-91 AC problem


      Ken,
          What did he tell you to do the cure the carbon problem.
      Thanks,
      Paul
        ----- Original Message ----- 
        From: Ken Thompson 
        To: discussion at nsrca.org 
        Sent: Thursday, June 02, 2005 7:22 PM
        Subject: YS-91 AC problem


        Thank you to all who gave me places to look for my problem.
        Somebody gave me the thought that maybe it was carbon deposits on a valve, I'm sorry I don't remember who.  I dismissed this theory because the valves seemed to be operating properly.
        Early this morning Mike Darr stopped by to check out my damaged Excelleron and took a look at my motor for me.  He manually worked the valves and all of a sudden the compression came back.  It looks like there was carbon on the valves after all.  He told me what to do and I should have it fixed as soon as I get back from Norfolk, a little trip this weekend to go out for the day on the USS Theodore Roosevelt.
        Thank you all again and thanks to Mike for showing me what to do.

        Ken Thompson
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