Morris C8

[pauldavies]

Hi Jonathon and I see what you mean, I had all sorts of dramas with not enough fuel going in then too much till I sorted it all out, See how you go but the carbi is sensitive to the fuel pressure going in, have a great Christmas and New year.
Paul

[Mike K]

Originally Posted by pauldavies

Hi Jonathon and I see what you mean, I had all sorts of dramas with not enough fuel going in then too much till I sorted it all out, See how you go but the carbi is sensitive to the fuel pressure going in, have a great Christmas and New year.
Paul

Hi . The carbies were gravity fed on the earlier models like the CS8 , these have a vacuum petrol system . The carby on the C8 , the military updraft is I think the same gravity fed type and it requires a low pressure feed otherwise the float bowl is overfilled.

[Richard Farrant]

Originally Posted by Mike Kelly

Hi . The carbies were gravity fed on the earlier CS8 , these have a vacuum petrol system . The carby requires a low pressure feed otherwise the float bowl is overfilled

Hi Mike,
That is the Autovac system, it was also used on the Morris Commercial C4 with the 4 cylinder engine. About 40 years ago when I was helping a friend restore a C4, I substituted an electric SU low pressure pump and that worked fine, (the Autovac was not in a usable condition).


regards, Richard

[Richard Farrant]

Originally Posted by Mike Kelly

Hi . The carbies were gravity fed on the earlier CS8 , these have a vacuum petrol system . The carby requires a low pressure feed otherwise the float bowl is overfilled

I should add that the later 4 cylinder in the C8GS has an AC mechanical lift pump and can be seen in the recent posts from Jon.

regards, Richard

[Mike K]

Ah yes the Autovac. The needle / seat in those military updraft Morris carbies can only handle low fuel pressure . The Morris Minor and S1 Land Rover SU pump would be an ideal fitup in a CS8/C4 because of the low 1.5 psi output. BTW the carbies were a special military dustproof design without a acc. pump system.

[Jonathan Moore]

Happy Christmas!!!!!!

As Richard stated mine has a mechanical lift pump, so this should dictate the required fuel pressure. when I bought the vehicle it had been converted, sort of, to a down draft carb set up, pictured below. I think the carb is off of a Bedford, others will know better but the bore is much smaller than the Morris carb. I have reinstalled an up draft carb but the one thing that I can't work out is how the choke cable and return spring is attached at the carb end. The workshop manual shows a bracket, which of course I don't have, with both attached but where and how does the bracket attach, help!!!! .

Have a good one,

Jon

[Mike K]

Hi Jonathan

The 4x2 manual 101/ML3 has a drawing of the choke cable setup. Ill try to scan the drawing but the library is closed til Friday. The original carbies have a code number on them that relates to which model they fit.

The 4x4 with the 4 cyl. EH engine carby is S92/164

[Jonathan Moore]

Thanks Mike, that would be fantastic.

Jon