The following warnings occurred:
Warning [2] Undefined property: MyLanguage::$archive_pages - Line: 2 - File: printthread.php(287) : eval()'d code PHP 8.1.31 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/printthread.php(287) : eval()'d code 2 errorHandler->error_callback
/printthread.php 287 eval
/printthread.php 117 printthread_multipage



Austinsevenfriends
fuel pump types interchangeable? - Printable Version

+- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum)
+-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1)
+--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14)
+--- Thread: fuel pump types interchangeable? (/showthread.php?tid=4849)

Pages: 1 2

fuel pump types interchangeable? - Andy Bennett - 23-08-2020

Evening
would be grateful for some advice. I have 33 box with late 33/early 34 2 bearing engine. it has what I believe is an M type fuel pump as on picture below.

My question is a simple one, is this interchangable with a T type pump?

   

Thanks
Andy

RE: fuel pump types interchangeable? - Ian Williams - 23-08-2020

Yes provided the arm is the correct type they will both work.

RE: fuel pump types interchangeable? - "Slack Alice" Simon - 23-08-2020

Yes.

But you need to check the T type pump has the correct arm for the A7.

The T type was used on many different cars.

Someone will come on here (probably) with the numbers you need to see, cast onto the arm.

The inlet and outlet positions are different. You cannot get the right by moving the top relative to the bottom.

The outlet can more or less be lined up with the existing pipe, the inlet is then about 180 degrees out.

I have made a short conversion pipe, extending the original, taking it under the pump to meet the inlet.

I didn't want to permanently mod the pipes. Not yet.

Most T types have a priming lever, and spares are available. Which is why it is worth doing.

Note the arm from the M type will not fit a T type, though I am working on a bodgy conversion just for my own amusement.

RE: fuel pump types interchangeable? - Andy Bennett - 24-08-2020

thanks both, much appreciated

Andy

RE: fuel pump types interchangeable? - David.H - 24-08-2020

I posted information on these numbers about a week or so back

RE: fuel pump types interchangeable? - Jeff Taylor - 24-08-2020

I believe the correct arm is numbered 856955 but arm no. 1524079 is also said to fit.

RE: fuel pump types interchangeable? - Andy Bennett - 24-08-2020

Thank you
Andy

RE: fuel pump types interchangeable? - Parazine - 28-08-2020

(23-08-2020, 08:42 PM)Andy Bennett Wrote: Evening
would be grateful for some advice. I have 33 box with late 33/early 34 2 bearing engine. it has what I believe is an M type fuel pump as on picture below.

My question is a simple one, is this interchangable with a T type pump?



Thanks
Andy

The three types you may encounter are interchangeable IF the correct lever is fitted as noted above. They are:


.jpg   s-l500 (12).jpg (Size: 77.41 KB / Downloads: 295)

AC "M" type, 1932 - 34. 


.jpg   Vintage-AC-Fuel-Pump-Type-T.jpg (Size: 22.55 KB / Downloads: 297)

AC "T" type, 1935 - 39


.jpg   Car-fuel-pump-AC-type-U-On.jpg (Size: 20.63 KB / Downloads: 297)

AC "U" type, never fitted by the factory to Austin 7's.

Many cars have had "U" type pumps fitted but they are of a larger capacity and may cause problems with flooding. This looks to be what's fitted to your motor Andy.

RE: fuel pump types interchangeable? - Murmelbar - 06-07-2022

Hi 
Is the U type petrol pumo suitable for 193) Nippy with a Rub6 engine 
Would appreciate some advice 
Jeff

RE: fuel pump types interchangeable? - Hedd_Jones - 06-07-2022

fundamentally yes. 

But not all U types are the same.