AUSTIN A35 1957 MODEL

What Klippy says could well be right and leads me to another suggestion. The flexible connection in the fuel line usually of rubber can perish and become covered in a myriad of tiny cracks.This will allow air to be drawn in along with the fuel. Check by bending the rubber sharply .Or there could be a pinhole under one of the clamping clips.Ideally replace the whole thing with new proper flexible piping and clamps/circlips. Another thing that can cause similar symptoms is a faulty rotor arm when it gets warm.Also lift up the boot floor covering and expose the fuel gauge top. Six screws or a rotating clamp rings secures it in place ,.Tap the ring round till it lines up with the cutouts or re.move the screws and Depends on which tank is fitted. Lift out the gauge carefully and put to one side. Now take a good torch and turn it on away from the tank ( for safety reasons ) and look carefully inside for anything floating around inside .Sometimes people had coatings put inside to prevent Rust. This can peel off and cause probs.If this is the case Renew the tank

Thank you for your advice, this weekend weather permitting I will get some diagnostic ating! !!! done.
My big problem will be repairing the pump, as I said before the bolt that holds the top on has stripped out, I'm hoping to find a threaded bolt slightly bigger or metric, that I can use a tap to re thread it,





This is stopping me from tightening the top right up.
If I can't resolve this prob I will have to get a new pump, I will check all the other things you suggested. thanks for looking, boz

Boz from the look of that it looks likely that has been replaced in the past with Epoxy. To remove it show it a blowlamp gently (or a hot air gun ) and pull and twist that one out and replace it with a suitable sized studding. Failing that look here.
www.google.co.uk/webhp?sourceid=chrome-i...%20a35%20fuel%20pump
you should find what you need on there. An alternative is to convert to an electric pump. Not original I know but it depends on how original you want to keep him Cheers John

As I recall that thread is 1/4UNC where it goes into the pump body. If you can find M7 anywhere (unlikely) then your next size up is M8x1.25 or 5/16UNC which will be too big since the casting is very thin there. I suggest get it Helicoiled by a specialist engineering company or bite the bullet and buy a new one. I have 1/4UNC Helicoils in my workshop, but it's a bit far!
You could also try 24hr Araldite, clean the parts really nicely with Lacquer thinners (Acetone or Nail polish remover), use a punch to shrink the hole before gluing together. It's worth a try.
A caveat here, don't hit these castings too hard, they're very fragile!

Thanks again, I tried the epoxy route but unfortunately it would not pull down tight enough.
Today I bought a slightly thicker bolt that I can cut down to length, and try to screw it in or tap it out!.
If it works that will be fine for now, if not I will have to buy a new or used pump.
Got the carb gasket set today, so will be soaking the carb in thinners until Saturday.


Looks like everything there exempt the jets, they sell them separately, so as to squeeze as much cash as they can from you.
Thanks for looking and the link, boz

Klippy Will m6 bolt be ok? I'm looking for someone in this area who can helicoil it, or I've seen ebay have some but don't know the right one to get, advice please

Panic over boys I found one on ebay new for £33 Inc postage, so it will be here Saturday.

To be far to Zenith the set you have will fit any 26 VME carb.
The jet sizes will depend on which engine the carb is fitted to. It was fitted to quite a few - A30, A35, A40. Leyland SSB tractor, etc,etc

Sorry Boz, just got here. The M6 Helicoil would have worked quite nicely.

Thanks for that, I am fitting this new pump temporarily, when malcolm comes of the road, I intend to get the original pump helicoil ed and fitted again.
This new pump is not the same as the original but will do as a spare for the future, boz

Carb is now stripped down, it soaking in thinners until Saturday morning


Thanks for looking, boz

O.E.M. pumps varied any way

Just check that the lever going into the engine is identical, and put a smear of grease on the shoe.

Well boys and girls, cleaned up the carb after 12 hours soaking in thinners, then fitted the new service kit.
Then gave the whole thing another good clean, it's now gone from this,




To this




The new fuel filter has not arrived as yet so hopefully soon, I will have to set it up when fitted mixture etc etc.
Thanks for looking and keep the comments coming along with the advice, it's all very much appreciated, boz

Hi Boz , glad you are pleased with the result. Said it would Thinners is a magic fluid .Now oil all the linkages and pivots etc.