Thread: Carby Leaking below bowl after stopping.

which carby?

Originally Posted by Blknight.aus

which carby?

sorry about that it is a Solex.

I have the same problem with my 61S2A solex, I plan to change to Zenith. My theory is that the float level and the level of the port on the central tower thingy (with the air jet screwed into its top) at the centre of the carb is related and important because if that tower which is press fitted into the carb body leaks, the float bowl will empty into the manifold over time each time you switch the engine off. The petrol you see is probably that which falls onto the throttle spindle and leaks out the spindle hole.

My central tower thingy broke where the air jet screws in so I made one which works well but doesn't seal well in the carb body hence leaks as described above. I either need to get a new part or change to Zenith.

Do you have to either manually work your fuel pump or wind the engine over lots (because the float bowl is empty)

Just my theory...cheers Les

it might be leaking from (and this is exceedlinly rusty disused memory here) one of the lead seals for a pilot tube, when the engines running and under vacume it wont leak when you stop no vac so it can leak.

rebuild time. replace it with a zenith... Its what ID do....

Originally Posted by 65s2a

I have the same problem with my 61S2A solex, I plan to change to Zenith. My theory is that the float level and the level of the port on the central tower thingy (with the air jet screwed into its top) at the centre of the carb is related and important because if that tower which is press fitted into the carb body leaks, the float bowl will empty into the manifold over time each time you switch the engine off. The petrol you see is probably that which falls onto the throttle spindle and leaks out the spindle hole.

My central tower thingy broke where the air jet screws in so I made one which works well but doesn't seal well in the carb body hence leaks as described above. I either need to get a new part or change to Zenith.

Do you have to either manually work your fuel pump or wind the engine over lots (because the float bowl is empty)

Just my theory...cheers Les

Thanks for the info, landy did take a fair amount of cranking however we have recently fitted the correct size battery from a defender and it starts much quicker now. Do you know a good source of zenith carbys.
Cheers Ben

G'day All, From my memory you can't fit a Zenith carburettor to a engine which had a Solex carburettor fitted, unless you have the carb/adaptor, are the mounting at right angles to each other?, I have a S2A 109 with a Zenith and it has this on it I'm certain, but it's way too dark n cold to be outside undoing ropes/tarps to look LOL anyway cheers Dennis

Originally Posted by Dinty

G'day All, From my memory you can't fit a Zenith carburettor to a engine which had a Solex carburettor fitted, unless you have the carb/adaptor, are the mounting at right angles to each other?, I have a S2A 109 with a Zenith and it has this on it I'm certain, but it's way too dark n cold to be outside undoing ropes/tarps to look LOL anyway cheers Dennis

That is correct - as well as the carburetter you need the adapter.

John