X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m20.mx.aol.com ([64.12.137.1] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2188195 for flyrotary@lancaironline.net; Thu, 19 Jul 2007 20:11:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.1; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m20.mx.aol.com (mail_out_v38_r9.2.) id q.c20.1a17acd9 (65098) for ; Thu, 19 Jul 2007 20:10:50 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Thu, 19 Jul 2007 20:10:49 EDT Subject: Re: [FlyRotary] Re: Carbs To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1184890249" X-Mailer: 9.0 SE for Windows sub 5042 X-Spam-Flag: NO -------------------------------1184890249 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 7/19/2007 3:53:35 PM Pacific Standard Time, lendich@optusnet.com.au writes: Subject: [FlyRotary] Re: Carbs > Richard, > You should seriously consider a clear float bowl. On engines capable of > pulling high vacuum WOT often will drain the float bowl if you don't run a > fuel pump. The resultant lean condition isn't good for your engine! > Bill Jepson Bill, I saw that on the Mikuni web site for the 48mm carby, they suggested a fuel pump. I didn't know you could get clear float bowls? George ( down under) Hi George, Yes you can get some kind of clear plastic floatbowls. I didn' t see any on the Sudco site though. Lynn has already posted a good alternate method. This is called a fuel level tube. Kawasaki used to say you MUST use a fuel level tube on carb work. The old method of setting by measuring the float isn't always accurate. You can do the fuel level tube by attaching a fitting to the cap on the bottom of the carb.(This is the cheapest part to replace if you mess up too!) just a flexible hose to a clear plastic or glass tube surcured straight up does the trick. I wouldn't use this for anything but testing though. The top of the tube has to be open to work. Ok for bench testing however. Buy a spare cap and run the standard one. Fuel pump, yes gravity feed through too small a feed hose or restrictive fuel filter can kill your engine by draining the float bowl at speed. The Harleys had such a bad time with it that the S&S Super carb had a optional valve attached to the throttle that opened a feed directly into the carb throat with a small adjustable jet. It bypassed the float bowl altogether. It fell from favor because many harleys didn't have a return spring on the throttle and some dumb passerby could dump all the gas out of your fuel tank by turning the throttle past 3/4 open wher the valve opened and then leaving. The resulting flooded engine and possible hydraulic lock were a true pain in the ass. An electric or even a vacuum pulse fuel pump is the way to go. Bill Jepson ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour -------------------------------1184890249 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 7/19/2007 3:53:35 PM Pacific Standard Time,=20 lendich@optusnet.com.au writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Subject:=20 [FlyRotary] Re: Carbs


> Richard,
> You should seriousl= y=20 consider a clear float bowl. On engines capable of
> pulling high=20 vacuum WOT often will drain the float bowl if you don't run a
> fue= l=20 pump. The resultant lean condition isn't good for your engine!
> Bil= l=20 Jepson

Bill,
I saw that on the Mikuni web site for the 48mm carb= y,=20 they suggested a fuel
pump. I didn't know you could get clear float=20 bowls?
George ( down under)

Hi George,
Yes you can get some kind of clear plastic floatbowls. I didn' t see an= y on=20 the Sudco site though. Lynn has already posted a good alternate method. This= is=20 called a fuel level tube. Kawasaki used to say you MUST use a fuel level tub= e on=20 carb work. The old method of setting by measuring the float isn't alway= s=20 accurate. You can do the fuel level tube by attaching a fitting to the cap o= n=20 the bottom of the carb.(This is the cheapest part to replace if you mess up=20 too!) just a flexible hose to a clear plastic or glass tube surcured straigh= t up=20 does the trick. I wouldn't use this for anything but testing though. The top= of=20 the tube has to be open to work. Ok for bench testing however. Buy a spare c= ap=20 and run the standard one.
 Fuel pump, yes gravity feed through too small a feed hose or=20 restrictive fuel filter can kill your engine by draining the float bowl at=20 speed. The Harleys had such a bad time with it that the S&S Super carb h= ad a=20 optional valve attached to the throttle that opened a feed directly into the= =20 carb throat with a small adjustable jet. It bypassed the float bowl altogeth= er.=20 It fell from favor because many harleys didn't have a return spring on the=20 throttle and some dumb passerby could dump all the gas out of your fuel tank= by=20 turning the throttle past 3/4 open wher the valve opened and then=20 leaving. The resulting flooded engine and possible hydraulic lock were=20= a=20 true pain in the ass. An electric or even a vacuum pulse fuel pump is t= he=20 way to go.
 
 Bill Jepson



Get= a sneak peek of the all-new AOL.com.
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