Topica Loopframe_Guzzi Archive
 

Subject: RE: Fuel Petcock Problem

Author: Keith Ruff

Date: Jun 5, 2002, 7:49 PM

Post ID: 1710382980

No inline filters here.

Just did a test this eve, turned both petcocks off, disconnected 1 fuel
line at a time and fuel flowed from each w/o a problem. If I put a
finger over the other end of the X cross tube while 1 line was
connected, the other disconnected, no flow. With both petcocks upper
fuel lines connected and fuel in the lower lines below the X cross pipe,
no fuel would flow out of the petcocks. Had me miffed, fuel flowed fine
with only 1 petcock hooked up, but as soon as the other was hooked up,
immediate stoppage. So I called Mark at MG Classics. My guess is what
he said is correct - fuel will eventually flow when the lower lines get
low and air is then filtered into the line allowing the gravity feed of
fuel. A way to all is well is to disconnect the banjo or the fuel line
going to it and allow the fuel to flow into a can, when the fuel
empties, the petcock should then fill the lines with fuel, I'll do this
check tomorrow, but I think it will work. I could have sworn my BMW's
always flowed to the top of the line right at the petcock when turned
on, don't know why these would be different.

Thanx for the responses, learning something new about
Patience/loopframes everyday.

Keith Ruff
71 Police Ambassador - NJ

Rich Pardo wrote:
 I thought this was just a gravity feed? If you have inline filters,
take
the hose from the petcock to the inline filter or off of the banjos,
point
if at a coffee can or some other high tech device, and turn the petcock
on.
Fuel should flow freely, if not, rust in tank or something blocking the
inlet to the petcock.

Otherwise it must be at the carbs. Banjos clean? etc. Can you blow
through
them?





 From: Keith Ruff <klru-@fcc.net>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: Fuel Petcock Problem
Date: Wed, 5 Jun 2002 12:10:25 +0000

Good Morning All,

I replaced both of my fuel petcocks the other night, and last eve filled
up the tank. Turned on the petcocks and nada, no fuel flowing (I have
clear fuel lines so I can see the flow). Tapped each one, nada. Opened
the gas tank, still no flow. I then loosened the clamp holding the fuel
line to the petcock and heard air release, then the fuel was leaking out
of the line by the clamp, so I had to tighten her up again. Did the
same to the other side, but at that point, the fuel had filled up in
that line from the other side, so I couldn't tell if she was flowing.
Patience is burried in the garage behind some basement finishing
materials, and rain is in the forecast for the next few days. I tried
to burn up some fuel at idle to see if fuel is flowing OK, but she just
doesn't eat up the fuel at idle, will have to take her for a ride and
carry a screw driver. Has anybody else experienced this problem or can
you let me know what the problem is? Apparantly I must have had a
vacuum problem initially, but I'm not sure if it is cured. Why would
this vacuum effect exists? Perhaps this was why my right petcock was
not flowing before I changed it out.
Greatly appreciate any help/advice.

Have a Great Day!
Keith Ruff
71 Police Ambassador - NJ


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