Engine runs lean, old Webra 61. Who can help?

[ORLANDO FRETS]

You may want to check the low speed needle, it may be too far in affecting
the high speed side. Try backing out the low speed needle and readjust the
high speed. I have seen several supertigre engines do this. Being that you
have a ST carb, this may be the problem.

ORLANDO FRETS
ojfrets at earthlink.net



> [Original Message]
> From: John Ferrell <johnferrell at earthlink.net>
> To: <discussion at nsrca.org>
> Date: 11/29/2003 12:33:41 PM
> Subject: Re: Engine runs lean, old Webra 61. Who can help?
>
> I have an of old OS 61 that I cannot adjust to get rich enough. It has a
> Super Tiger carburator on it. As you back the needle out you get to a
point
> that it is getting leaner. I suspect that the port timing has been changed
> by raising the exhaust port. If you fly it on a pipe, you get 1 flight per
> glow plug. It does a little better with a muffler. I am about to revisit
it
> as an academic exercise. I plan to first put a venturi restrictor in it
for
> more fuel draw. If that does not do it I plan on trying different pumps &
> carburators.
>
> Anyone ever build their own pump?
>
> John Ferrell
> 6241 Phillippi Rd
> Julian NC 27283
> Phone: (336)685-9606
> johnferrell at earthlink.net
> Dixie Competition Products
> NSRCA 479 AMA 4190  W8CCW
> "My Competition is Not My Enemy"
>
>
> ----- Original Message ----- 
> From: "Urs Baertschiger" <ursbaertschiger at hotmail.com>
> To: <discussion at nsrca.org>
> Sent: Saturday, November 29, 2003 5:22 AM
> Subject: Re: Engine runs lean, old Webra 61. Who can help?
>
>
>
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