Looking for anybody who might have an idle cut-off valve for the Zenith carburetor. Car is a 1971 2800CS.
.
Thanks
Pedro
.Thanks
Pedro
Wanted- Electric Idle Cut-off Valve for the Zenith 35/40 INAT Carburetor
- Thread starter ohio2800cs
- Start date
stphers
Well-Known Member
I can look but not hopeful, they are also used on the 74-76 2 bbl 2002's as well
Thanks, Rick
Thanks, Rick
New is better, but... The one I found is Pierburg, has a "50" (presume .5mm) a "5336" and "12V" stamped on hex faces.
It passes the doesn't suck through unless hooked up to power test BUT the jet contact surface is different than yours, doesn't have the small counterbore. (bad picture attached gives the idea)
Don't know how big or small the seat cone is on your carb. Others in the know need to chime in if it will work properly.
It passes the doesn't suck through unless hooked up to power test BUT the jet contact surface is different than yours, doesn't have the small counterbore. (bad picture attached gives the idea)
Don't know how big or small the seat cone is on your carb. Others in the know need to chime in if it will work properly.
this is correct
the other stepped one is difficult to say
stphers
Well-Known Member
I would boy the one from the ebay fellow That is a decent deal
Thanks, Rick
Thanks, Rick
Thank you for checking! Besides the difference in the tip shape, the hole size is much smaller than mine. I think it wouldn't pass as much fuel. A friend had one that looked much like yours, it came off an old VW with a solex carb. We tried it, but the engine didn't seem to want to idle correctly with it.
Look inside the counterbore; there should be a much smaller size hole in the insert cap - if it is missing that may be your problem.
Do you know what size jet was in the VW unit?
That 218 BMW # shows for a number of cars and is superseded by another 516 # described only as "50"; presumably a .5mm jet. The new number is then also shown for 2002 and comes with (OUCH!) $350 suggested price. That 516 number has the shoulder.
On my USA CS biggest recurring carb problem I had were the long skinny smaller-than-euro idle jets on top side getting clogged up.
Do you know what size jet was in the VW unit?
That 218 BMW # shows for a number of cars and is superseded by another 516 # described only as "50"; presumably a .5mm jet. The new number is then also shown for 2002 and comes with (OUCH!) $350 suggested price. That 516 number has the shoulder.
On my USA CS biggest recurring carb problem I had were the long skinny smaller-than-euro idle jets on top side getting clogged up.
Thanks for the information!
I took this photo to compare my valve versus the VW one. It's hard to tell how small the orifice
at the bottom of my Zenith's idle-stop valve actually is. It may well be the same as that tiny orifice
on the VW's valve. Unfortunately, I don't know what size the VW's orifice is.
I did decide to buy the one in the EBay listing. I also have two Royze kits and will be taking apart the
carbs to give them a good cleaning. Thanks everyone for your comments and taking the time to look
to see if you had what I needed. Much appreciated!