I bought a carb repair kit from vehicules-anciens.fr, I was taking the carb off anyway to do some general cleaning and to replace the leaky gasket between it and the manifold.
Car ran reasonably well prior. New kit fitted, which included new plunger for the accelerator pump and a shiny new needle valve. I checked and adjusted the accelerator pump stroke and the gap between the flap and actuating rod when the choke was closed. There had previously been no gap between the two.
On startup it was apparent that the carb was flooding badly, rough idle, black smoke and a strong smell of petrol. Removed carb top and rechecked the needle valve, thinking I might have dislodged some dirt.
Blowing through the fuel inlet and pressing the plunger on the needle valve stopped the air, so that appeared to be working fine. All back together and exactly the same thing happened again, so I refitted the old needle valve, perfect start and tickover. Except now the car refused to rev cleanly. A quick jab of the accelerator caused the car to cut out and building the revs it was clear that the engine was not happy. I'm now thinking fuel starvation, so I did what I should have done prior and checked the fuel level.
The manual states, that you measure from the gasket face, without gasket, to the extended tip of the float needle with a range of 11.85 -12.05mm. Closest I can get is 13.5mm, nipping the valve tightly to the point I fear stripping the threads and fitting the thinnest washer I have. Which means the float isn't coming up as far as it should. If I remove the washer, I can just about hit 12.05mm but obviously with no sealing washer, there will be fuel leaking past the needle valve body.
What I find odd is that the car was revving fine with this needle valve and original washer. I will compare the old and new gasket as I have a feeling the new one is thinner. Has anyone else come up with this problem?
Car ran reasonably well prior. New kit fitted, which included new plunger for the accelerator pump and a shiny new needle valve. I checked and adjusted the accelerator pump stroke and the gap between the flap and actuating rod when the choke was closed. There had previously been no gap between the two.
On startup it was apparent that the carb was flooding badly, rough idle, black smoke and a strong smell of petrol. Removed carb top and rechecked the needle valve, thinking I might have dislodged some dirt.
Blowing through the fuel inlet and pressing the plunger on the needle valve stopped the air, so that appeared to be working fine. All back together and exactly the same thing happened again, so I refitted the old needle valve, perfect start and tickover. Except now the car refused to rev cleanly. A quick jab of the accelerator caused the car to cut out and building the revs it was clear that the engine was not happy. I'm now thinking fuel starvation, so I did what I should have done prior and checked the fuel level.
The manual states, that you measure from the gasket face, without gasket, to the extended tip of the float needle with a range of 11.85 -12.05mm. Closest I can get is 13.5mm, nipping the valve tightly to the point I fear stripping the threads and fitting the thinnest washer I have. Which means the float isn't coming up as far as it should. If I remove the washer, I can just about hit 12.05mm but obviously with no sealing washer, there will be fuel leaking past the needle valve body.
What I find odd is that the car was revving fine with this needle valve and original washer. I will compare the old and new gasket as I have a feeling the new one is thinner. Has anyone else come up with this problem?