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Another non-obvious problem could be the top of the float bowl has no vent.=
=C2=A0 In this case a bubble of air can be trapped in there and not allow t=
he fuel level to rise and shut off fuel.=C2=A0 The late model TR6 carbs had=
a small valve that switches this vent from the port on the face of the car=
burettor and a special port that connects to the charcoal canister.=C2=A0 I=
f the air filter gasket doesn't have a hole lined up with that port the air=
can't vent out.=C2=A0 Also, the special port, which is active only during =
closed throttle is part of the Anti-Run-On system.=C2=A0 If that has been s=
tripped out all bets are off as to what happened to the special port.=C2=A0=
=20
Make sure the holes in the A-F gasket match the holes in the carb face and =
make sure that extra port is not capped off.
Dave=20
=20
On Tuesday, October 3, 2023 at 05:38:09 PM CDT, Anthony Rhodes <spamiam=
@comcast.net> wrote: =20
=20
If it is dumping gas that badly, then it is not a problem with the meterin=
g needle.=C2=A0 That is really a fine tuning device.
That much gas may be from the float chambers having too much fuel.=C2=A0 Wa=
y too much.=C2=A0=20
Check the pressure in the fuel line.=C2=A0 If it is too high it will overco=
me the float valve.=C2=A0=20
Maybe the float valves are not sealing?=C2=A0 Maybe the floats are not adju=
sted properly?=C2=A0 Or not actually floating and are just sinkers?
-Tony
Sent from my 1837 Babbage Analytical Engine
> On Oct 3, 2023, at 2:44 PM, triumphs-request@autox.team.net wrote:
>=20
> Message: 1
> Date: Thu, 28 Sep 2023 17:57:54 -0700
> From: Frank Burkhart
>=C2=A0 I?m hoping that someone out in Triumph world can provide some clari=
fication on carburetors.=C2=A0 Currently, Zenith Stromberg carbs on my 1975=
TR6.=C2=A0 The car has been running poorly since Trimphest (too many RPMs?=
).=C2=A0 And then it died completely but turned out to need a new rotor.=C2=
=A0 Asked the mechanic, Mike, to take a look at the everything to figure ou=
t what can be made better.=C2=A0 What he found was the carbs were dumping g=
as into the cylinders especially when starting, to the point the gas was wa=
shing down the cylinder walls preventing the rings from sealing.=C2=A0 Resu=
lt was a lot of white smoke.
>=20
> The carbs were rebuilt about 18 months ago by Apple Hydraulics in New Yor=
k.=C2=A0 Supposedly all new parts including a new piston in one of the carb=
s.=C2=A0 Mechanic Mike is questioning the quality but . . .=C2=A0 Several p=
aths to try:
>=20
> 1.=C2=A0 New needles and basic over haul.=C2=A0 Least expensive but maybe=
stopgap measure.
>=20
> 2.=C2=A0 Rebuild these carbs using a different shop.=C2=A0 Mike recommend=
s a shop in Colorado. I?m would worry about a 2nd rebuild in short period o=
f time.
>=20
> 3.=C2=A0 Replace the carbs.
> 3a.=C2=A0 Mike has a pair of SU carbs in good shape.=C2=A0 Mike would rep=
lace ?consumables? and install
>=20
> 3b.=C2=A0 Find a pair Stromberg carbs
>=20
> 3c.=C2=A0 Mike likes carbs by Mikuni
>=20
> 3c.=C2=A0 Replace with Webers
>=20
> Any ideas / suggestions on what path seems the best?
>=20
> Hope all the world is going well for all.=C2=A0 Hope to see everyone at V=
elocity.
>=20
>=20
> Thank you,
> Frank Burkhart
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs=C2=A0 http://www.team.net/a=
rchive
sey@cs.com
=20
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<html><head></head><body><div class=3D"ydp1e81e41fyahoo-style-wrap" style=
=3D"font-family:Arial, Helvetica, sans-serif;font-size:16px;"><div><div dir=
=3D"ltr" data-setdir=3D"false">Another non-obvious problem could be the top=
of the float bowl has no vent. In this case a bubble of air can be t=
rapped in there and not allow the fuel level to rise and shut off fuel.&nbs=
p; The late model TR6 carbs had a small valve that switches this vent from =
the port on the face of the carburettor and a special port that connects to=
the charcoal canister. If the air filter gasket doesn't have a hole =
lined up with that port the air can't vent out. Also, the special por=
t, which is active only during closed throttle is part of the Anti-Run-On s=
ystem. If that has been stripped out all bets are off as to what happ=
ened to the special port. <br></div><div dir=3D"ltr" data-setdir=3D"f=
alse"><br></div><div dir=3D"ltr" data-setdir=3D"false">Make sure the holes =
in the A-F gasket match the holes in the carb face and make sure that extra=
port is not capped off.<br></div><div><br></div><div class=3D"ydp1e81e41fs=
ignature"><div style=3D"color: black; font-style: normal; font-weight: norm=
al; font-stretch: normal; font-size: 12pt; line-height: normal; font-family=
: Arial, Helvetica, sans-serif; font-size-adjust: none;"><div style=3D"colo=
r: black; font-style: normal; font-weight: normal; font-stretch: normal; fo=
nt-size: 12pt; line-height: normal; font-family: Arial, Helvetica, sans-ser=
if; font-size-adjust: none;"><div><font size=3D"4">Dave <br></font></div><d=
iv><span style=3D"font-size:10.0pt;font-family:sans-serif;color:black;"><br=
></span></div><br></div></div></div></div>
<div><br></div><div><br></div>
=20
</div><div id=3D"ydpc0c3ad6fyahoo_quoted_6900672725" class=3D"ydpc0=
c3ad6fyahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Tuesday, October 3, 2023 at 05:38:09 PM CDT, Anthony=
Rhodes <spamiam@comcast.net> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div dir=3D"ltr">If it is dumping gas that badly, then=
it is not a problem with the metering needle. That is really a fine=
tuning device.<br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">That m=
uch gas may be from the float chambers having too much fuel. Way too=
much. <br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Check th=
e pressure in the fuel line. If it is too high it will overcome the f=
loat valve. <br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Ma=
ybe the float valves are not sealing? Maybe the floats are not adjust=
ed properly? Or not actually floating and are just sinkers?<br></div>=
<div dir=3D"ltr"><br></div><div dir=3D"ltr">-Tony<br></div><div dir=3D"ltr"=
><br></div><div dir=3D"ltr">Sent from my 1837 Babbage Analytical Engine<br>=
</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">> On Oct 3, 2023, at 2=
:44 PM, <a href=3D"mailto:triumphs-request@autox.team.net"; rel=3D"nofollow"=
target=3D"_blank">triumphs-request@autox.team.net</a> wrote:<br></div><div=
dir=3D"ltr">> <br></div><div dir=3D"ltr">> Message: 1<br></div><div =
dir=3D"ltr">> Date: Thu, 28 Sep 2023 17:57:54 -0700<br></div><div dir=3D=
"ltr">> From: Frank Burkhart<br></div><div dir=3D"ltr"><br></div><div di=
r=3D"ltr"><br></div><div dir=3D"ltr">> I?m hoping that someone out=
in Triumph world can provide some clarification on carburetors. Curr=
ently, Zenith Stromberg carbs on my 1975 TR6. The car has been runnin=
g poorly since Trimphest (too many RPMs?). And then it died completel=
y but turned out to need a new rotor. Asked the mechanic, Mike, to ta=
ke a look at the everything to figure out what can be made better. Wh=
at he found was the carbs were dumping gas into the cylinders especially wh=
en starting, to the point the gas was washing down the cylinder walls preve=
nting the rings from sealing. Result was a lot of white smoke.<br></d=
iv><div dir=3D"ltr">> <br></div><div dir=3D"ltr">> The carbs were reb=
uilt about 18 months ago by Apple Hydraulics in New York. Supposedly =
all new parts including a new piston in one of the carbs. Mechanic Mi=
ke is questioning the quality but . . . Several paths to try:<br></di=
v><div dir=3D"ltr">> <br></div><div dir=3D"ltr">> 1. New needle=
s and basic over haul. Least expensive but maybe stopgap measure.<br>=
</div><div dir=3D"ltr">> <br></div><div dir=3D"ltr">> 2. Rebuil=
d these carbs using a different shop. Mike recommends a shop in Color=
ado. I?m would worry about a 2nd rebuild in short period of time.<br></div>=
<div dir=3D"ltr">> <br></div><div dir=3D"ltr">> 3. Replace the =
carbs.<br></div><div dir=3D"ltr">> 3a. Mike has a pair of SU carbs=
in good shape. Mike would replace ?consumables? and install<br></div=
><div dir=3D"ltr">> <br></div><div dir=3D"ltr">> 3b. Find a pai=
r Stromberg carbs<br></div><div dir=3D"ltr">> <br></div><div dir=3D"ltr"=
>> 3c. Mike likes carbs by Mikuni<br></div><div dir=3D"ltr">> <=
br></div><div dir=3D"ltr">> 3c. Replace with Webers<br></div><div =
dir=3D"ltr">> <br></div><div dir=3D"ltr">> Any ideas / suggestions on=
what path seems the best?<br></div><div dir=3D"ltr">> <br></div><div di=
r=3D"ltr">> Hope all the world is going well for all. Hope to see =
everyone at Velocity.<br></div><div dir=3D"ltr">> <br></div><div dir=3D"=
ltr">> <br></div><div dir=3D"ltr">> Thank you,<br></div><div dir=3D"l=
tr">> Frank Burkhart<br></div><div dir=3D"ltr"><br></div><div dir=3D"ltr=
">** <a href=3D"mailto:triumphs@autox.team.net"; rel=3D"nofollow" target=3D"=
_blank">triumphs@autox.team.net</a> **<br></div><div dir=3D"ltr"><br></div>=
<div dir=3D"ltr">Donate: <a href=3D"http://www.team.net/donate.html"; rel=3D=
"nofollow" target=3D"_blank">http://www.team.net/donate.html</a><br></div><=
div dir=3D"ltr">Archive: <a href=3D"http://www.team.net/pipermail/triumphs"=
rel=3D"nofollow" target=3D"_blank">http://www.team.net/pipermail/triumphs<=
/a> <a href=3D"http://www.team.net/archive"; rel=3D"nofollow" target=
=3D"_blank">http://www.team.net/archive</a><br></div><div dir=3D"ltr"><br><=
/div><div dir=3D"ltr">Unsubscribe/Manage: <a href=3D"http://autox.team.net/=
mailman/options/triumphs/dave1massey@cs.com" rel=3D"nofollow" target=3D"_bl=
ank">http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com</a><=
br></div></div>
</div>
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** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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