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John,
Does your engine idle after you start it? If you can get it to idle you are ok, so check the float level. Otherwise you may have too big secondary venturis. (the bullseye small venturi) They are changeable, and most webers have at least two sizes. The smaller venturi is used to generate enough vacuum at low throttle openings to pull the fuel from the float bowls. If youo have the largest size you may need the smaller one. I'm not sure of the sizes on the 48, but on the 40 DCOE they had a 15mm and a 18mm IIRC.
Bill Jepson
-----Original Message-----
From: David Moyer <davidm@remconinc.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 2 Jun 2009 5:15 am
Subject: [FlyRotary] Re: Weber 48
If you are getting fuel into the float bowls it should run. Sounds like a metering passage maybe clogged? Not too familar with that carb though.
David Moyer
Lynn, do you happen to have the dimensions for the float level in the Weber 48. I have the Haynes manual on Webers, but I can't find the float level for the 48. The engine won't start with the carb unless I inject some WD-40 into the carb, the idle adjustment is set according to spec's. The larger return line lowered the fuel press to 0, so I set it at 3 pounds, which fills the carb with gas without leaking. JohnD
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