YS 91FZ problems still

[Dean Pappas]

Hi Dean,
If the O-ring is orange, it is likey silicone. You will likely find it locally, as well as through YS. The green flouroelastomer O-rings used in automotive refrigeration applications would work here too.
Regards,

Dean Pappas
Sr. Design Engineer
Kodeos Communications
111 Corporate Blvd.
South Plainfield, N.J. 07080
(908) 222-7817 phone
(908) 222-2392 fax
d.pappas at kodeos.com


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Bob Kane
Sent: Thursday, December 16, 2004 10:36 PM
To: discussion at nsrca.org
Subject: Re: YS 91FZ problems still


That could certainly cause the problem. It is probably
Viton rubber or something similar.


--- Dean & Melissa Williams <dmwilliams at bigpond.com>
wrote:

> Hi
> Tom Koenig and Peter Pennissi are about three
> thousand kilometres away but I will get in contact
> with them for some support.
> I did dismantled the regulator after I noticed some
> leakage from around the adjusting screw and found
> the O ring is split .
> I am going to order a replacement as well as a
> diaphragm just in case.
> As to the over heating the motor is in the plane
> with no cowl , so it is like it is on a test stand
> fully open and it was running great before , there
> are no signs of heat on the case and the motor seems
> fairly cool compared to the two strokes I run by
> feel ( I have not got an temp gun but I can get one
> , what temp should it approx be? ) 
> One extra question is the O ring neoprene as it is
> an orange colour but still seems to been eaten by
> the fuel very brittle and split ?
> 
> Thanking everybody for their help
>                                               Dean
> (outback OZ)
>   ----- Original Message ----- 
>   From: Rcmaster199 at aol.com 
>   To: discussion at nsrca.org 
>   Sent: Friday, December 17, 2004 1:22 AM
>   Subject: Re: YS 91FZ problems still
> 
> 
>   Dean, you have several Pattern people in
> Australia, and a couple of them, Tom Koenig and
> Peter Pennissi are regulars on the Discussion board.
> Their addresses are as follows:
>   Tom.Koenig at actewagl.com.au and
> Peter.Pennisi at publicworks.qld.gov.au.
> 
>   Try and see if either one is close enough to get
> you some direct help
> 
>   good luck, and happy holidays
> 
>   Matt Kebabjian
>     From: Dean & Melissa Williams 
>     To: discussion at nsrca.org 
>     Sent: Thursday, December 16, 2004 1:40 AM
>     Subject: YS 91FZ problems still
> 
> 
>     Hi 
>     This motor was running great at last after my
> idle problems thanks to you guys (fix them by
> sanding the rocker cover) was getting 9000 rpm top
> end and 2100 rpm bottom end with A 14x 10 with
> a20/20 this is a new engine. 
>     The plane has still not been in the air. 
>     the engine has had about 5l of fuel through it. 
>     The problem now is it starts runs up and tunes
> out to 9000rpm and runs for about 1 to 2 min. and
> then starts to surge and goes off tune with air
> bubbles in the fuel line from the regulator. 
>     Please help as I am from the outback of
> Australia and have no assistance out here. 
> 
>     Thanking you 
>     Dean (outback OZ) 
> 


=====
Bob Kane
getterflash at yahoo.com


		
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