Thread: Carb's don't work

If the rubber diaphragm is OK (undo 4 screws on the top cover to access) check the oil in the dampers. Actually, check the damper oil first!

Diaphram is fine has oil in dampers.

Check that there is a restrictor in the return line, the float valve isnt stuck closed and the bowl is filling.

Disconnect the linkage connecting the carbs and rev it individually on each carb to isolate the non-contributor.

any chance of a pic....?


im not too sure what pipes etc you are talking about.....

Originally Posted by DEFENDERZOOK

any chance of a pic....?


im not too sure what pipes etc you are talking about.....

Same.

Can't do a pic sorry, pipe is on top of carb looking at engine from front, right carb the pipe is at the front on top, left carb at the rear.

There should be blance pipe between the 2 carbys (not essentil) there should be 2 pipes from the tappet covers via flame trap (not essentil) one to each carby

there should be one large fuel line with T to each carby (essentil) and a smaller T'ed blance fuel line (return) (not essentil)

if the diphram is ok oil in the tube is'nt essentil its only there for dampner on cruzing light throttel..

with the motor running pull the air fillter hoses off each side an watch the pistons in the carbys they should both be going up n down...if one aint while the motors running place long small screwdriver under the poston and lift it up manualy revs should change....I'v seen the piston stick, the seat wear a large hole and just dump fuel into the intake vally

P38 rover just recently put up good info on these carbys have a look t that may give you some better idieas

how you been any way wortho......long time no see...

Tony

wortho we must av been typing at the same time them pipes are the engine breather pipes

one off each tappet cover need to be blocked off at the carby or connected back to the tappet cover

Here is a pic that you may be able to work from:



Interestingly, when I put this in I couldn't get it to run properly for the life of me. It just burped, farted, missed, stalled and most defiantely wouldn't run at all properly, let alone rev out. In the end the problem was just the black rubber tube that goes from 1 carby to the other in the pic above. I just hadn't vented it to the atmosphere and so the carbies were fighting each other rather than breathing properly. I was happy when I finally worked out what the problem was.