[NSRCA-discussion] YS DZ pump settings

[adriancwong at earthlink.net]

Ed,

I had the same clogging issue with my 160 using that Magnum DZ fuel 6 months ago. However, Buzz from Magnum isolated the problem and changed one of the fuel component, problem solved since then. 

Did your friend ever send the engine to YS for de-carbonization? In addition, did he use a different header? Once the engine developed carbon, problem will not go away by just switching fuel. Also, if the header is full of carbon, the opening will get smaller and smaller. Eventually, chocking the engine. I had the same issue, with engine running fine on the ground at the beginning. Within five minutes, it will run slower and slower, eventually dead stick.

Look inside the engine's exhaust opening, if there is carbon, you can see it on the exhaust valve. The only solution is to send it back to YS, and change to a new header.

Adrian




-----Original Message-----
>From: Ed Deaver <divesplat at yahoo.com>
>Sent: Feb 11, 2006 10:56 PM
>To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>Subject: [NSRCA-discussion] YS DZ pump settings
>
>My buddy has a 140DZ and is having problems.  CoolPower 30% Heli fuel, 16.5x12.5W prop, flying at sea level.  
>   
>  We had been using Magnum DZ but his header kept getting plugged, so switched fuel.
>   
>  Now he is having problems with it backfiring.  He lost his spinner the other day, and another time it was held on only by a thread or so on the spinner bolt.
>   
>  He has tried richening up the pump(turning in) and has also tried running it blubbery rich(2.25 turns out)  
>   
>  On the ground, it starts easily, runs well he states, then soon as taking off, it begins to run ragged, and recently yeilding 10 of 10 dead stick
>   
>  Any suggestions??
>   
>  Thanx in advance
>   
>  ed
>
>