YS 140 DZ going lean in -ve g manoeuvres

[Troy Newman]

Pump is too lean!

That is probably why you had a cam gear fail too...Went lean and 
backfired..do it enough and it will eat the cam gear.

Richen the pump say 1/4 turn and re set the high end....In is rich on the 
pump. This means more pressure so you need to close the high end down or 
lean it.


If the lean burp still happens dial in the pump some more and re-set the 
high end again.

I just had my 160DZ do this in my new model. Took 1/4 turn...but my 
hesitation was very slight.

TN


>From: "PENNISI Peter" <Peter.Pennisi at publicworks.qld.gov.au>
>Reply-To: discussion at nsrca.org
>To: <discussion at nsrca.org>
>Subject: YS 140 DZ going lean in -ve g manoeuvres
>Date: Thu, 13 May 2004 10:28:43 +1000
>
>Hi all,
>
>
>My DZ has only returned from holidays in Japan were it was repaired by YS
>from another cam failure.
>
>
>The engine is running absolutely superb except when you pull high negative 
>g
>manoeuvres like the reverse humpty bump it gets a little lean for a few
>seconds put it does come good.
>
>I have re-plumbed the model put the problem is still there.
>
>Running
>
>APC 16 x 12
>OS F plug
>Tetra 20 oz tank with OS sintered(Spelling) bubble less pickup.(Yes the
>expensive one)
>Hatori exhaust (698 pipe)
>Coolpower 30% heli blend
>Model is ZN-LINE Alliance.
>
>Any suggestions
>
>
>Peter
>
>
>
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