Subject: Re: [Healeys] accelerator

From: warthodson--- via Healeys <[email-masked]>
Date: Sun, 19 May 2019 22:05:32 +0000 (UTC)

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To state the obvious, your carbs &/or throttle linkage are not adjusted cor=
rectly.=C2=A0First, your BN4 Has HD8 carbs, so you have at least a few non-=
standard modifications. The linkage as originally designed requires some "f=
ree play" in it. I would begin by disconnecting both carbs from the linkage=
 & verify that the throttle shafts & "butterfly damper" will go completely =
& freely closed. Make sure the throttle shafts are not being held slightly =
open by one of the adjustment screws (some people call them "Idle screws") =
on the Carb. Verify that the valves & timing are correctly adjusted. Adjust=
 the carbs individually while they are not connected to the linkage as desc=
ribed in the shop manual. HD8 carbs are notorious for being difficult to pr=
operly adjust. Some people adjust the idle as described in the manual & oth=
ers swear that the idle circuit does not work correctly on (2) HD8's. You a=
re on your own in determining what works for you.=C2=A0Make sure the overdr=
ive lever on the throttle linkage near the firewall has the specified clear=
ance as described in the shop manual.Good luck,Gary Hodson

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On Sun, May 19, 2019 at 11:36 AM Dr C A Rubino <[email-masked]> wrote:

Recently the the relay shaft nylon bracket broke (old age) replaced it with=
 a new one. Relatively easy.=C2=A0Today went to start the car and revs go a=
ll the way to 4000 immediately and no playing with the accelerator pedal ma=
kes a difference. Looking in the engine compartment all linkage parts seem =
to be OK and functional.=C2=A0Any ideas?=C2=A0BN_4 with HD8 carbs__________=
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<div style=3D"color:black;font: 10pt arial;">
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<div>To state the obvious, your carbs &amp;/or throttle linkage are not adj=
usted correctly.&nbsp;</div>

<div>First, your BN4 Has HD8 carbs, so you have at least a few non-standard=
 modifications. The linkage as originally designed requires some "free play=
" in it. I would begin by disconnecting both carbs from the linkage &amp; v=
erify that the throttle shafts &amp; "butterfly damper" will go completely =
&amp; freely closed. Make sure the throttle shafts are not being held sligh=
tly open by one of the adjustment screws (some people call them "Idle screw=
s") on the Carb. Verify that the valves &amp; timing are correctly adjusted=
. Adjust the carbs individually while they are not connected to the linkage=
 as described in the shop manual. HD8 carbs are notorious for being difficu=
lt to properly adjust. Some people adjust the idle as described in the manu=
al &amp; others swear that the idle circuit does not work correctly on (2) =
HD8's. You are on your own in determining what works for you.&nbsp;</div>

<div>Make sure the overdrive lever on the throttle linkage near the firewal=
l has the specified clearance as described in the shop manual.</div>

<div>Good luck,</div>

<div>Gary Hodson</div>
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<div class=3D"yiv9111728979gmail_attr" dir=3D"ltr">On Sun, May 19, 2019 at =
11:36 AM Dr C A Rubino &lt;<a href=3D"mailto:[email-masked]" target=3D=
"_blank" rel=3D"noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:rubin=
[email-masked]">[email-masked]</a>&gt; wrote:<br clear=3D"none"></div>
<blockquote class=3D"yiv9111728979gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">

<div dir=3D"ltr">

<div dir=3D"ltr">

<div style=3D"font-size:12pt;font-family:Calibri;color:rgb(0,0,0);">

<div>Recently the the relay shaft nylon bracket broke (old age) replaced it=
 with=20
a new one. Relatively easy.</div>

<div>&nbsp;</div>

<div>Today went to start the car and revs go all the way to 4000 immediatel=
y and=20
no playing with the accelerator pedal makes a difference. Looking in the en=
gine=20
compartment all linkage parts seem to be OK and functional.</div>

<div>&nbsp;</div>

<div>Any ideas?</div>

<div>&nbsp;</div>

<div>BN_4 with HD8 carbs</div>
</div>
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