14-08-2017, 07:50 PM
(This post was last modified: 14-08-2017, 08:16 PM by Steve Jones.)
I don't think it's quite that simple. I've just been through a box of around a dozen Zenith float chambers and whilst some do have the tube covered with a cap, most do not. The clue is if the well has an internal screw thread to take the cap. If yours does have the internal thread then yes, you've got some bits missing. If it doesn't have the thread then, like the majority I've just looked at, it appears it's just a drilling in the float chamber casting.
However, if your float chamber does have the internal thread for the cap that's not the end of it as I've identified two sizes of tube in my little stock! One has a smaller diameter drilling through it but no markings I can see to indicate size. The second has a larger diameter drilling and is stamped '2' on the bottom.
It's a long time since I had any involvement with these Zenith carbs (so heaven knows why I've still got a box of spares) but if your carb does have the internal drilling in the well, email me your address and I'll put the smaller diameter tube and the cap in the post to you so you can try it and see what happens. I have to say though that your problem seems more like the fuel level in the float chamber is a touch to high than anything else though.
Steve
Edited: Simon beat me to it with his reply but we're saying the same thing. I have to admit I've a mixture of side draft and down draft Zenith carbs and more float chambers than carbs so I'm not sure which float chamber relates to which carb in most cases.
A not particularly good photo of the tubes and caps.
However, if your float chamber does have the internal thread for the cap that's not the end of it as I've identified two sizes of tube in my little stock! One has a smaller diameter drilling through it but no markings I can see to indicate size. The second has a larger diameter drilling and is stamped '2' on the bottom.
It's a long time since I had any involvement with these Zenith carbs (so heaven knows why I've still got a box of spares) but if your carb does have the internal drilling in the well, email me your address and I'll put the smaller diameter tube and the cap in the post to you so you can try it and see what happens. I have to say though that your problem seems more like the fuel level in the float chamber is a touch to high than anything else though.
Steve
Edited: Simon beat me to it with his reply but we're saying the same thing. I have to admit I've a mixture of side draft and down draft Zenith carbs and more float chambers than carbs so I'm not sure which float chamber relates to which carb in most cases.
A not particularly good photo of the tubes and caps.