YS 140DZ fault?

[Dave Smith]

MessagePeter:  A friend had similar problems yesterday.  See my query to Dave Shadel at RC Universe,under the YS Engines section.  
Maybe his answer will address your problem?

Dave
  ----- Original Message ----- 
  From: Peter Pennisi 
  To: discussion at nsrca.org 
  Sent: Tuesday, April 22, 2003 10:58 AM
  Subject: YS 140DZ fault?


  Hi All,

  I tried running my YS140 DZ for the first time on the bench (I am glad that I did now) without much success.

  Main needle was set to 2 turns initially and regulator untouched from factory setting. Rest is usual with 16 x 12 APC.

  Engine started OK and idled briefly however when I started to open up the throttle slowly it would start to run hard lean from half throttle and then stop abruptly (detonated). Then I opened the needle another 1/2 a turn and same result. I then wound the main needle in to 1 1/2 turns and same result. During this period I started to hear a rattle noise from around the mechanical pump assembly so I stopped my testing.


  I spoke to the Australian agent and he mentioned that some engines were getting around with some suspect pumps. He has offered to supply a spare pump or otherwise send the motor to him and have it repaired. (Yes, not replaced)

  My question to everybody is how many people have had a pump related problem? and secondly is there any truth that the pump may require some lapping in as he believes the tolerances are probably a little tight.

    
  Regards,

  Peter

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