mk2 3.8 carb set up
#1
mk2 3.8 carb set up
I am trying to restore a 1961 3.8 auto that had a fire in the engine bay and lost some parts. Can any body photograph the set up of the carb links to one another and to the throttle links, return spring(s). It needs a shot after removing the air filter so that am parts can be seen.
There was more than one set up as carbs were modified and improved together with general updating.
My carbs have small springs around each end of the butterfly shafts. If I try to add a return spring to the left hand side this appears to almost make it almost impossible to connect to the throttle arms as the starting carb is in the way!!!
So if any body can show me some pics I would be very indebted.
Other than that if they can name a publication or reference that shows the set up!!
regards barry
There was more than one set up as carbs were modified and improved together with general updating.
My carbs have small springs around each end of the butterfly shafts. If I try to add a return spring to the left hand side this appears to almost make it almost impossible to connect to the throttle arms as the starting carb is in the way!!!
So if any body can show me some pics I would be very indebted.
Other than that if they can name a publication or reference that shows the set up!!
regards barry
#2
To add to my original request, but this may be easier to get a response.Where hd6's are fitted with coil springs fixed at each end of the butterfly spindle, is there a seperate throttle return spring attached to the shaft inbetween the carbs, or any other place.
In other words do these 2 coil springs return the butterfly to the closed position?
regards barry
In other words do these 2 coil springs return the butterfly to the closed position?
regards barry
Last edited by barrymk2; 02-06-2013 at 06:21 AM.
#4
#6
#7
Jan, 1 last question. The carbs you pictured, I assume they are HD6's, do they have a spring coiled around the main shaft that goes through both carbs,butterflies are attached, with a connector in the middle?. The springs are to the rear of the rear carb to the front of the front carb!. These act as throttle return springs.
Or are the long springs the only throttle return, long to the middle, bottom fixed to bracket on oil filter, and a shorter one at the front secured to a 'Y' shaped bracket!
My search so far seems to show that there were different set ups, unique to each type of carb, and latter modifications.
Many thanks for your patience. Maybe I can help you at some time ,I hope!!
Best regards Barry
Or are the long springs the only throttle return, long to the middle, bottom fixed to bracket on oil filter, and a shorter one at the front secured to a 'Y' shaped bracket!
My search so far seems to show that there were different set ups, unique to each type of carb, and latter modifications.
Many thanks for your patience. Maybe I can help you at some time ,I hope!!
Best regards Barry
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#8
#9
Barry,
I'm also working on a 61 3.8 sedan. If you need pix as you go, let me know.
Joe
https://www.jaguarforums.com/forum/m...project-80737/
I'm also working on a 61 3.8 sedan. If you need pix as you go, let me know.
Joe
https://www.jaguarforums.com/forum/m...project-80737/
#10
Here are a couple of shots from a '65 Mark 2. The only return spring I'm aware of is the long one that attaches to the camlike lever on the shaft at the forward carb. This is at right in the first pic viewed from above and at left in the second looking from below. Sounds like your setup might be different.
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