YS 140DZ fault?

[Tomanek, Wojtek]

Do you have the full production version or the earlier one?
 
Did you take the engine apart to check?


W- 
 
-----Original Message-----
From: Peter Pennisi [mailto:pentagon.systems at bigpond.com]
Sent: Tuesday, April 22, 2003 9:58 AM
To: discussion at nsrca.org
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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