• 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)

TR2/3/3A Throttle rod link to carburetor; basic questions


Freshman Member
I've been out of commission for a few years and just putting my TR-3A back on the road. I've overhauled the carbs, which I removed years ago. Everything looks good EXCEPT I can't figure out how to connect the throttle rod (the long one with the ball sockets) to the carbs! I'm sure it's something simple, but I've been playing with it like a monkey for hours and can't figure it out. Please help! A photograph would be ideal, as all photos I can find are of removed carbs, or if they are on the car the picture is taken from the intake side and the throttle rod is below and on the engine side, and so out of view.

I suppose I could be missing a piece, but even assuming that I can't figure it out.....

While we are at it, there is a small diameter vacuum tube running from the vacuum advance on the distributor to the carb area. I can't figure out where to attach that, either.

Very frustrating to have such seemingly little things stump me, but there it is....


Great Pumpkin - R.I.P
There should be a right angle bell-crank attached to the intake manifold below the front carb. Hard to see (and hard to photograph), but you can see the part where the long link attaches here

Then there is a short link that runs from the other arm of the bell-crank up to the lever on the front carb. (Note: the bolt head in my photo has been modified.)


The vacuum advance line goes to a port in the bottom of the front carb, which is basically invisible unless the carb is off the car. There is usually a small brass adapter that screws into the carb, then the line screws onto it. Kind of dirty, but here's a shot that shows it


Country flag
Hello Ken

Good that you are back in commission and back working on the TR3A project.

Do you have the bell crank that mounts on the front end of the manifold?

The small tube threads into the small hole on the front carb. Between the flange on the right in the photo and the bowl retaining bolt.

That is not the carb going on my car it is a spare I had handy.

Carb linkage.jpg
Carb holes.jpg


Freshman Member
Hey Guys (Randall, Tom and David) - Thank you so much for your quick and very helpful replies. The photos are terrific! I now have hope! I will tackle it again tomorrow, newly armed for the fray!
Similar threads
Thread starter Title Forum Replies Date
R TR2/3/3A Throttle rod spring location Triumph 3
F TR2/3/3A Throttle linkage cross rod Triumph 4
C Overdrive throttle switch rod connection picture Austin Healey 3
R TR6 Throttle/Carb issues 73 TR-6 Triumph 23
Healey Nut Tri-Carb Throttle Controls Austin Healey 4
D TR2/3/3A TR3 throttle linkage bell crank. Triumph 13
Walter74 Throttle Cable Conversion Austin Healey 6
J Throttle Controls Identification Austin Healey 4
B RHD BJ8 Throttle Control Rods Austin Healey 9
K TR2/3/3A Sending out SU's for throttle shaft rebushing........ Triumph 4
C Jammed Throttle Linkage Austin Healey 3
T BT7 throttle relay levers short and long Austin Healey 1
R TR2/3/3A Carb throttle return spring tension Triumph 2
Michael Oritt 100 throttle linkage--help needed Austin Healey 3
D TR4/4A SU HS6 throttle spindle size Triumph 19
C TR6 Carburetor Throttle Linkage Triumph 10
warwick-steve Throttle shaft bearing/bush on bulkhead Austin Healey 9
J TR2/3/3A TR3A Throttle shaft bushing retainer plates, Correct color? Triumph 2
Lukens TR2/3/3A Installing a throttle. Triumph 2
K TR2/3/3A Kangarooing on light throttle Triumph 14
ckeithjordan TR2/3/3A H6 Throttle Linkage Triumph 13
catfood Throttle return mechanism on the BN1 Austin Healey 4
RickPA Overdrive throttle switch caused meltdown Austin Healey 2
M Throttle pedal problem Austin Healey 8
bighealeysource Strange problem with throttle staying open Austin Healey 6
A Throttle Pedal Height Austin Healey 10
Bob_Spidell Throttle Bushes Austin Healey 6
T Looking for advice for throttle linkage for Weber DCOE Spridgets 2
Rob Glasgow Overdrive Throttle Switch Austin Healey 9
Rut TR4/4A SU throttle linkage and brackets Triumph 5
T Philosophizing on keeping cars for more decades - prompted by a broken throttle cable Spridgets 3
Lukens TR2/3/3A Anyone ever see a push/pull throttle mounted on the dash? Triumph 4
P Bj8 rhd cable throttle conversion - help Austin Healey 6
TomMull Shortening a throttle cable Q&D with stuff in the shop. Restoration & Tools 5
TomMull Spitfire Throttle linksge needed Triumph 10
TomMull Post-War Other Herald carpets and throttle issues Triumph 4
MY66AH Throttle Linkage Spridgets 9
doc50 TR2/3/3A Throttle sticks Triumph 8
J TR2/3/3A Need a part for the throttle shaft. Triumph 4
B Pics of throttle shaft reaming Austin Healey 6
B Longbridge 100-6 Throttle Linkage Pictures - Any Out There? Austin Healey 27
C TR6 Broken Throttle Shaft Triumph 4
Got_All_4 TR2/3/3A Throttle shaft assemble does this look correct Triumph 5
T Stuttering throttle response, mixture problem? Austin Healey 13
Martinld123 Small Puff of Black Smoke When I Blip Throttle Austin Healey 6
E TR4/4A TR4 Throttle shaft position Triumph 1
T throttle sticking? Austin Healey 4
davidb AH 3000 tri-carb throttle shafts Austin Healey 13
tmcarthur Throttle Pedal Lever Spridgets 7
glemon General TR Those Darn Throttle Shaft Bushings [TR4-6] Triumph 8

Similar threads