Subject: [Tigers] Carb Fire Continued

From: Stu via Tigers <[email-masked]>
Date: Mon, 31 Aug 2015 12:44:22 -0400

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Michael King thinks there's a history of the stock carbs lighting things up
on hot restarts.  Does anyone else have any history?

Does anyone know what the mechanism might be?  I know the accelerator pump
is OK, nothing dripping there.  The only other logical explanation is fuel
being forced out the bowl vent.  I'll look for traces when I take the
photos tonight.  Could the float valve  works have occasional issues?  A
sinking float?  Could fuel be boiling from the heat soak when its shut
off?  Or when fuel hits the hot bowl when the pump starts?  Any other
theories?

Stu

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small"><di=
v class=3D"gmail_default">Michael King thinks there&#39;s a history of the =
stock carbs lighting things up on hot restarts.=C2=A0 Does anyone else have=
 any history?</div><div class=3D"gmail_default"><br></div><div class=3D"gma=
il_default">Does anyone know what the mechanism might be?=C2=A0 I know the =
accelerator pump is OK, nothing dripping there.=C2=A0 The only other logica=
l explanation is fuel being forced out the bowl vent.=C2=A0 I&#39;ll look f=
or traces when I take the photos tonight.=C2=A0 Could the float valve =C2=
=A0works have occasional issues?=C2=A0 A sinking float?=C2=A0 Could fuel be=
 boiling from the heat soak when its shut off?=C2=A0 Or when fuel hits the =
hot bowl when the pump starts?=C2=A0 Any other theories?</div><div class=3D=
"gmail_default"><br></div><div class=3D"gmail_default">Stu</div></div></div=

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From: Ron Fraser via Tigers <[email-masked]>
Date: Mon, 31 Aug 2015 12:59:32 -0400

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Stu
    I don't know of any history of the Autolite carb being a fire =
hazard.
=20
We are working with an open fuel system on the Tiger instead of the =
closed
systems on newer vehicles so we need to do a little more maintenance.
=20
I would look for these:
=20
Too much fuel pressure from fuel pump
stuck float valve
Sinking float
Fuel line fitting leaking
Bad carb gasket
Cracked carb fuel bowl
=20
I would think that if you turned the fuel pump ON you will see a fuel =
leak
somewhere. =20
Just be careful when you try that - fuel spray can hurt.
=20
Ron Fraser
=20
=20

-----Original Message-----
From: Tigers [mailto:[email-masked]] On Behalf Of Stu via
Tigers
Sent: Monday, August 31, 2015 12:44 PM
To: Tiger Net
Subject: [Tigers] Carb Fire Continued

Michael King thinks there's a history of the stock carbs lighting things =
up
on hot restarts.  Does anyone else have any history?

Does anyone know what the mechanism might be?  I know the accelerator =
pump
is OK, nothing dripping there.  The only other logical explanation is =
fuel
being forced out the bowl vent.  I'll look for traces when I take the =
photos
tonight.  Could the float valve  works have occasional issues?  A =
sinking
float?  Could fuel be boiling from the heat soak when its shut off?  Or =
when
fuel hits the hot bowl when the pump starts?  Any other theories?

Stu

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<HTML><HEAD>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii">
<TITLE>Message</TITLE>

<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23588"></HEAD>
<BODY>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015>Stu</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015>&nbsp;&nbsp;&nbsp; I don't know of any =
history of the=20
Autolite carb&nbsp;being a fire hazard.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>We are=20
working with an open fuel system on the Tiger&nbsp;instead of the closed =
systems=20
on newer vehicles so we need to do a little more=20
maintenance.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>I=20
would look for these:</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>Too=20
much fuel pressure from fuel pump</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>stuck=20
float valve</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015>Sinking float</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>Fuel=20
line fitting leaking</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>Bad=20
carb gasket</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015>Cracked carb fuel bowl</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>I=20
would think that if you turned the fuel pump ON you will see a fuel leak =

somewhere.&nbsp; </SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>Just=20
be careful when you try that - fuel spray can hurt.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN =
class=3D625054816-31082015>Ron=20
Fraser</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff size=3D2 face=3DArial><SPAN=20
class=3D625054816-31082015></SPAN></FONT>&nbsp;</DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px" dir=3Dltr>
  <DIV></DIV>
  <DIV dir=3Dltr lang=3Den-us class=3DOutlookMessageHeader =
align=3Dleft><FONT size=3D2=20
  face=3DTahoma>-----Original Message-----<BR><B>From:</B> Tigers=20
  [mailto:[email-masked]] <B>On Behalf Of </B>Stu via=20
  Tigers<BR><B>Sent:</B> Monday, August 31, 2015 12:44 PM<BR><B>To:</B> =
Tiger=20
  Net<BR><B>Subject:</B> [Tigers] Carb Fire =
Continued<BR><BR></FONT></DIV>
  <DIV dir=3Dltr>
  <DIV style=3D"FONT-SIZE: small" class=3Dgmail_default>
  <DIV class=3Dgmail_default>Michael King thinks there's a history of =
the stock=20
  carbs lighting things up on hot restarts.&nbsp; Does anyone else have =
any=20
  history?</DIV>
  <DIV class=3Dgmail_default><BR></DIV>
  <DIV class=3Dgmail_default>Does anyone know what the mechanism might =
be?&nbsp; I=20
  know the accelerator pump is OK, nothing dripping there.&nbsp; The =
only other=20
  logical explanation is fuel being forced out the bowl vent.&nbsp; I'll =
look=20
  for traces when I take the photos tonight.&nbsp; Could the float valve =

  &nbsp;works have occasional issues?&nbsp; A sinking float?&nbsp; Could =
fuel be=20
  boiling from the heat soak when its shut off?&nbsp; Or when fuel hits =
the hot=20
  bowl when the pump starts?&nbsp; Any other theories?</DIV>
  <DIV class=3Dgmail_default><BR></DIV>
  <DIV =
class=3Dgmail_default>Stu</DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>

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[email-masked]

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From: awtiger--- via Tigers <[email-masked]>
Date: Mon, 31 Aug 2015 15:09:57 -0400

Stu:

There is a possibility that there may have been small piece of trash that got lodged in the needle valve that kept it from shutting off the flow of fuel from the pump.  This happened to my father-in-law on his '55 Ford pickup that he built.  He installed a 302 in it with an Autolite 2100 and an electric fuel pump.  As we were working on it one afternoon, fuel came pouring out of the weep hole in the top of the carb and running down all over the intake.  Luckily, we caught it before there were flames.  When we started diassembling things, we found some trash lodged in the needle and seat.  We thoroughly cleaned that assembly and then reinstalled it.  There have been no problems since.  It would be interesting to cut open your fuel filter to see if it contained any foreign material.

Keep us posted,
Andy Walker
Edmond, OK

[email-masked]