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View Full Version : What is the best way to set float height on a Solex 32PBI-2 Carburettor



jedwards
15th April 2023, 05:05 PM
Gentlemen, I've always struggled with setting the float height on various carburettors I've had of the decades.
Most require you to bend the float lever, and some require various washer thicknesses to pack out the Float needle, and some suggest measuring the distance between the top cover's mating surfaces and the top of the float.

What I am interested to learn from this experienced group is what is the most accurate (and least complex ) way of determining the point where the float needle closes.
Ive read that on the Soles 32PBI-2 Carburettor, the float shut -off point should be 16mm down from the top cover mating surface to the top of the float, who just closed. But what is the best way to detriment the shut off point?

I usually remove the carb from the vehicle, pour fuel into a clear plastic tube connected to the carb's fuel input port. When the level of fuel in the plastic tube stops going down, I assume that the needle is closed. I can then take off the top cover (trying not to spoil any fuel) and measure the float height.
This always seems to be a very messy way of doing it and I cannot see the pros doing so much work for such a simple task, that would need doing on every tune up.
Are there any better ways of doing this?

Any insights greatly appreciated.

regards and best wishes to all,
Jeff in Perth.

jedwards
3rd May 2023, 02:59 PM
After a good deal of research and examination of the cross sectional diagrams of the 32PBI-2 carburettor, I realised that the answers to me earlier question was actually quite simple, logical and easy to do.
The needle value used on the 32PBI-2 carburettor can be adjusted like earlier Solexes, by adding or removing washers. In fact the correct location can be set by taking off the top cover, and placing a steel rule across the underside of the Top cover. The dome of the needle valve body, through which the needle protrudes, needs to line up with the gasket face of the top cover. In other words, a steel rule, place across the gasket face of the top cover should just touch the top of the dome of the needle valve. Then brass needle lever should lie parallel with the gasket face, neither bending up or down, as per the image.

I hope this is of some help.
regards

Jeff in Perth, Western Australia