• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

Choke Adjustment

wayne kelly

Freshman Member
Offline
Hi Folks,
Question regarding a 1967 Triumph TR4A. When the choke is pulled out, it immediately wants to return to the off position when released. What can be done to ensure that the choke remains in the forward or on position when released?
Thanks for your help!
 

dklawson

Yoda
Offline
I don't know the specific OEM cable for the TR4. On some British cars the choke cable core is "solid" instead of stranded and those stay in place just due to friction. Other cars of the period used a braided cable that you could twist to lock as Tom said. Depending on how important originality is to you, you could use either a choke cable with a solid core wire or a twist-lock choke cable as would have been used on cars like the MGB the same age as your TR4.
 

sail

Darth Vader
Silver
Country flag
Offline
Close Tom, counter clockwise on my 4A locks it. Usually leave it locked for a mile or two, turn right to release and let it go off on its own.
WELCOME! On a whim hopped the ferry to Yarmouth a few years ago, slept in the empty bar (off season and low budget) had a nice drive around the southern portion of Nova Scotia, and back to the states thru New Brunswick. Would like to go back to PEI.
 

Geo Hahn

Yoda
Country flag
Offline
I think the original cable were designed with a spring loaded little crescent shaped piece (quite tiny) that engaged notches on the solid part of the cable (the part just behind the knob). As you pull it out the knob the springed piece clicks into the notches to hold whatever position you pull to. To release the cable you twist the knob and the piece moves off of the notch and the cable goes back in. That's how mine works.

The common problem occurs because if the cable is ever withdrawn and spring is moved that little crescent bit can fall out -- often unnoticed -- then there is nothing to hold the position of the cable.

The traditional 'tool' to hold the choke out should that feature be lost is simple enough -- a clothes pin.
 

TR3driver

Great Pumpkin - R.I.P
Offline
The little crescent shaped piece also wears out over time. If you are perverse enough, you can make a new one from brass stock.

The replacement cable I got from Moss several decades ago is a "twist to lock" design (and will lock if turned either way). It used a similar little spring-loaded metal piece, which I was able to replace (and restore the locking function).
 

Don Elliott

Obi Wan
Offline
Some TR owners with this problem carry a clothes-peg in the side pocket so when they want the choke to stay "ON", they put the clothes-peg on the choke cable after they pull out the knob.
 
Similar threads
Thread starter Title Forum Replies Date
N BJ8 choke adjustment Austin Healey 4
mabbott TR6 TR6 Choke cable adjustment? Triumph 4
skinsgamer ZS Automatic water Choke adjustment Spridgets 11
WALTER BJ8 CHOKE ADJUSTMENT Austin Healey 14
TomMull TR2/3/3A Which choke cable Triumph 12
sparkydave Zenith auto choke coming loose Spridgets 2
T TR6 TR6 Choke Cable Lubrication Triumph 5
S BJ8 Choke Cable- How to tighten the nut behind the dash? Austin Healey 6
K TR2/3/3A Couple of choke questions Triumph 1
K Choke cable replacement Austin Healey 1
D AH 300O MK1 Choke Knob Position Austin Healey 5
R Jensen-Healey Choke? Other British Cars 1
F TR2/3/3A Choke Cable Problem Triumph 29
F Choke sticking Austin Healey 22
N Enrichener [choke] wire Austin Healey 1
HighAltitudeTR3 TR2/3/3A Choke setting tips? Triumph 7
F TR2/3/3A Choke Triumph 1
edkap2002 TR6 72 tr6 choke cable Triumph 4
Patrick67BJ8 BJ8 Choke Cables Austin Healey 5
TRMark TR4/4A Choke Cable Routing Triumph 3
S TR2/3/3A choke operation from the factory !!!! Triumph 29
S TR2/3/3A Too much fast idle, not enough choke? Triumph 0
BN6_2197 Correct run of the Choke Cable of BN6 Austin Healey 7
S TR4/4A aftermarket choke cable Triumph 3
sparkydave Zenith auto choke coming loose Spridgets 3
K TR4/4A Strombergs...wont idle unless choke pulled out? Triumph 7
UmmYeahOk GT6 I Give Up! Help A Millennial Out [Carb/Choke Related] Triumph 28
M TR2/3/3A Choke Cable Detent Device Triumph 11
Rob Glasgow Choke cable turnion Austin Healey 8
TomMull TR2/3/3A Choke on new to me TR3 Triumph 16
L Choke Mechanism 100/6 Austin Healey 26
trrdster2000 TR6 Double Choke Cable Repair Triumph 0
1 TR6 Tr6 needs choke to run good Triumph 11
rjc157 bn7 electronic choke Austin Healey 0
A 1960 BT7 choke location Austin Healey 8
E T-Series MG TD choke cable MG 2
O Electric choke problem. Jaguar 0
T TR2/3/3A TR3 choke cable connection help needed Triumph 21
S TR4/4A choke linkage Triumph 2
T 100 Choke Modification Austin Healey 5
L Help with electric choke, 1960 AH BT7 Austin Healey 2
R Choke Not Working In Cool Weather Austin Healey 15
cmacmillan TR6 now what have I done? choke on rebuilt carbs.... Triumph 6
B BT7 carburetor - choke - fuel questions Austin Healey 5
J How to put a stop on the end of a choke cable? Restoration & Tools 2
B TR2/3/3A Choke cable detent Triumph 4
B TR2/3/3A choke cable attachment Triumph 14
N DCOE double vs. single choke theory Spridgets 11
bighealeysource simple choke question on BN2 Austin Healey 2
B BJ8 choke cable Austin Healey 0

Similar threads

Top