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Re: [TR] ZS Carb Questions

To: Harrymague@aol.com
Subject: Re: [TR] ZS Carb Questions
From: Michael Burdick <burdickm@mindspring.com>
Date: Tue, 12 Jul 2016 10:47:54 -0400
Cc: triumphs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <42b5d9.55a6a3eb.44ae50f3@aol.com>
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Harry - Another possibility is that the needle has become disengaged from
the adjusting screw and is no longer moving when you turn the screw.  When
this happens, the needle is left in the full-lean position and no amount of
turning the adjusting screw will change it. The adjustment is a bit
counter-intuitive in that to enrich the mixture, you turn the adjusting
screw clockwise, and to lean out the mixture, you turn the screw counter
clockwise.  If you were turning the screw counter clockwise in an attempt
to enrich the mixture, the needle may have fallen off the screw.

The way to tell if the needle and screw are still engaged is to turn the
screw clockwise.  Eventually, it should bottom out and stop turning
(envision a screw 1" long being screwed into a threaded hole 1/2"
deep).  To re-engage a needle that has fallen off, put some slight pressure
on the needle pushing it back towards the piston while turning the
adjusting screw clockwise.

Hope this helps,
Mike Burdick
Durham, NC


On Wed, Jul 6, 2016 at 8:17 AM, <Harrymague@aol.com> wrote:

> After doing some engine work, I notice that one of the cards had a small
> leak.  I replaced the bottom float seal.  I doing so, I notice that the
> float value appeared to be sticking so I replaced it.  I check the float
> level and it appeared to be the 16-17 mm tolerance listed.  I reinstalled
> the carb and noticed that the engine was running a little rough.  I used my
> ColorTune.  It showed the carb was running lean.  I attempted to adjust the
> mixture but could not get the carb to run any richer.  My question is: if
> the float was not adjusted correctly, making the level of fuel in the bowl
> low, could this cause my inability to adjust the mixture rich??
> Thanks in advance for any suggestion.
> Harry Mague
> Beavercreek, OH
> 1973 1/2 TR6
>
>
> ** triumphs@autox.team.net **
>
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<div dir=3D"ltr"><div>Harry - Another possibility is that the needle has be=
come disengaged from the adjusting screw and is no longer moving when you t=
urn the screw.=C2=A0 When this happens, the needle is left in the full-lean=
 position and no amount of turning the adjusting screw will change it.=C2=
=A0The adjustment is a bit counter-intuitive in that to enrich the mixture,=
 you turn the adjusting screw clockwise, and to lean out the mixture, you t=
urn the screw counter clockwise.=C2=A0 If you were turning the screw counte=
r clockwise in an attempt to=C2=A0enrich the mixture, the needle may have f=
allen off the screw.=C2=A0</div><div><br></div><div>The way to tell if the =
needle and screw are still engaged is to turn the screw clockwise.=C2=A0 Ev=
entually, it should bottom out and stop turning (envision a screw 1&quot;=
=C2=A0long=C2=A0being screwed into a=C2=A0threaded=C2=A0hole 1/2&quot; deep=
).=C2=A0=C2=A0To re-engage a=C2=A0needle that has fallen off, put some slig=
ht pressure on the needle pushing it back towards the piston while turning =
the adjusting screw clockwise.</div><div><br></div><div>Hope this helps,</d=
iv><div>Mike Burdick</div><div>Durham, NC</div><div>=C2=A0 </div></div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Jul 6, 2016 a=
t 8:17 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:Harrymague@aol.com"; tar=
get=3D"_blank">Harrymague@aol.com</a>&gt;</span> wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex"><u></u>



<div style=3D"color:rgb(0,0,0);font-family:Arial;font-size:10pt"><font colo=
r=3D"#000000" face=3D"Arial" size=3D"2">
<div>After doing some engine work, I notice that one of the cards had a sma=
ll=20
leak.=C2=A0 I replaced the bottom float seal.=C2=A0 I doing so, I notice th=
at=20
the float value appeared to be sticking so I replaced it.=C2=A0 I check the=
=20
float level and it appeared to be the 16-17 mm tolerance listed.=C2=A0 I=20
reinstalled the carb and noticed that=C2=A0the engine was running a=20
little=C2=A0rough.=C2=A0 I used=C2=A0my ColorTune.=C2=A0 It showed the carb=
 was=20
running lean.=C2=A0 I attempted to adjust the mixture but could not get the=
 carb=20
to run any richer.=C2=A0 My question is: if the float was not adjusted=20
correctly, making the=C2=A0level of fuel in the bowl low, could this cause =
my=20
inability to adjust the mixture rich??</div>
<div>Thanks in advance for any suggestion.</div>
<div>Harry Mague</div>
<div>Beavercreek, OH</div>
<div>1973 1/2 TR6=C2=A0 </div></font></div><br><br>
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<br></blockquote></div><br></div>

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