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Mystery carb part on 70S
https://www.ausmini.com/forums/viewtopic.php?f=2&t=69963		 Page 1 of 1
Author:  bmacpiper [ Tue Apr 05, 2011 3:29 pm ]
Post subject:  Mystery carb part on 70S
G'day everyone,

Buffed out the first carb yesterday and reassembled. I had one part left over, a small, flat aluminum washer. Looking at the other carb today, I think this washer goes on the needle jet, i.e. the jet that slides up and down and is attached to the fuel line from the bowl.

(By the way, is that sliding jet the choke?)

Three photos below--to show where/how I think it gets installed. Can someone verify that this is correct?

Posting some pictures on my other thread also of the buffing of the carbs--they came out really shiny and nice. (members mini gallery-- http://www.ausmini.com/forums/viewtopic ... 974#802974 )

Thanks and talk soon,
Ben

Image

Image

Image
Author:  sitnlo62 [ Tue Apr 05, 2011 4:55 pm ]
Post subject: 
Correct Ben,
Dave
Author:  simon k [ Tue Apr 05, 2011 8:24 pm ]
Post subject:  Re: Mystery carb part on 70S
bmacpiper wrote:
(By the way, is that sliding jet the choke?)


no, the jet is always called the jet - the choke is a mechanism that works the jet and the throttle linkage
Author:  bmacpiper [ Tue Apr 05, 2011 11:43 pm ]
Post subject:  Re: Mystery carb part on 70S
simon k wrote:
bmacpiper wrote:
(By the way, is that sliding jet the choke?)


no, the jet is always called the jet - the choke is a mechanism that works the jet and the throttle linkage


OK, let me be more specific. When I pull on the choke knob on the dash, does the cable cause the jets to slide down a bit, thus enrichening the mixture (and it also appears that the throttle is bumped up a bit at the same time)?

tx,
Ben
Author:  simon k [ Wed Apr 06, 2011 9:44 am ]
Post subject:  Re: Mystery carb part on 70S
bmacpiper wrote:
simon k wrote:
bmacpiper wrote:
(By the way, is that sliding jet the choke?)


no, the jet is always called the jet - the choke is a mechanism that works the jet and the throttle linkage


OK, let me be more specific. When I pull on the choke knob on the dash, does the cable cause the jets to slide down a bit, thus enrichening the mixture (and it also appears that the throttle is bumped up a bit at the same time)?

tx,
Ben


yes :D

sorry if I sounded like I was being pedantic - but you got it right ;) I just didn't want you to start referring to the jet at the choke
Author:  bmacpiper [ Wed Apr 06, 2011 9:57 am ]
Post subject: 
No worries mate, you're right. :).

Have I mentioned how much I LOVE working on these carbs, especially compared to old VW Solex's? WAY cool in their simplicity.

ben
Author:  TheMiniMan [ Wed Apr 06, 2011 10:30 am ]
Post subject: 
That flat washer doesn`t really need to be there, it was (more than likely) left over from the "fuel-Miser" brand of jet that was probably previously fitted to the carb

the new jet you are showing in the pick is the correct SU item (p/n TK6000) & doesn`t generally use that flat washer

however, it won`t hurt it being there, just not needed
Author:  bmacpiper [ Wed Apr 06, 2011 1:02 pm ]
Post subject: 
TheMiniMan wrote:
That flat washer doesn`t really need to be there, it was (more than likely) left over from the "fuel-Miser" brand of jet that was probably previously fitted to the carb

the new jet you are showing in the pick is the correct SU item (p/n TK6000) & doesn`t generally use that flat washer

however, it won`t hurt it being there, just not needed


The old jets are black plastic on both ends, with a black rubber hose in the middle.

The only downside I can see of having the washer on the SU is that it would limit how far in I can adjust the big nut that the jet rides against. But I have a feeling I don't need to adjust in that far anyway.

Thanks all.
bmc
Author:  bmacpiper [ Wed Apr 06, 2011 2:02 pm ]
Post subject: 
Hey, while we're talking about jets...

When you tighten the fuel line into the bottom of the bowl, do you keep going until you hit a hard stop, or just until you get some good resistance from the black rubber gasket that's being squished?

Ben
Author:  bnicho [ Wed Apr 06, 2011 2:30 pm ]
Post subject: 
The MiniMan is correct (as usual). :)

The Fuel Miser non-genuine jets were (are?) slightly tapered where the plastic jet body sat against the adjuster nut. Sometimes the plastic jets would actually stick in the adjuster nut. Fuel-Miser's quick-fix solution was to include that washer in the kit. :roll:
Author:  sgc [ Wed Apr 06, 2011 2:38 pm ]
Post subject: 
bmacpiper wrote:
Hey, while we're talking about jets...

When you tighten the fuel line into the bottom of the bowl, do you keep going until you hit a hard stop, or just until you get some good resistance from the black rubber gasket that's being squished?

Ben


It only needs to be tight enough to seal and not come undone. If it's too tight, imagine what you're doing to the rubber washer ;) I've seen some pretty mangled ones come out over the years...
Author:  Mick [ Wed Apr 06, 2011 3:53 pm ]
Post subject: 
Further to the above, over tighten this nut and it will deform the seal and block the line...
Author:  bmacpiper [ Thu Apr 07, 2011 12:22 am ]
Post subject: 
Guess we'll see how bad I've bunged it up. Hopefully they'll still work.
b
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