Would anyone have a photo or photo’s of the Hand Throttle Mechanism from the dash to the carburettors? I seem to be missing it as well as the arm on the shaft of the carburettor. I have a photo of the arm on the carburettor on a friend’s car.
The hand throttle on the SS differs from the MkIV so I only have photos I’ve taken in the past. The MkIV lever in your photo is free to rotate on the throttle shaft but has a little pad that catches on the foot pedal lever and can thereby open the throttle but not close it. A Bowden cable from the hand throttle has its outer anchored somewhere on the rear carb but I can’t see in my photo exactly where.
In my car the outer hand throttle cable is held back by a pressed steel tab with a fine hole at one end (which allows the inner cable to pass) and a coarse one at the other which is clamped with the bolt holding the plenum chamber for the air cleaners .
Darryl
I wrongly suggested that the loose lever on the throttle spindle acted on the fixed lever (connected to the pedal). It actually acts on the little fixed collar that is in between the two levers in my photo.
Not a problem Peter, thank you for the clarification. It’s all a steep learning curve for me with every part I discover is missing. You must have been fortunate to have had all the parts for your lovely car. So far I have found the missing bits and pieces which is encouraging. I have appreciated the Jaguar community and the assistance I have been offered when trying to locate parts.
It acts on a lever clamped on the cross bar part of the pedal linkage.
The cable passes through a little brass sleeve with a hex head set screw to hold it.
I suppose Lucas was in the business of making dashboard knobs and this was right up their alley.
Sort of an early version of cruise control, although they didn’t call it that.
I have not driven mine yet on a long quiet road where I could try it.
Peter’s throttle control knob is post-war as it has straight-cut knurls, whereas on Rob’s pre-war one the knurls are cross-cut. I believe this difference is true for all the dashboard controls.
Denis
I really don’t understand the point of the Hand Throttle? When the Starting Carburettor has done its work the car will idle quite nicely as on the MKV and most subsequent models. No doubt someone will have a good reason as to why it was used.