Carburetor Adjustment Aid

3D print file for Simson BVF carburetor adjustment aid.

The adjustment aid works as follows: When the carburetor hangs freely in the air and the float is unsprung, the bottom edge should be 33.5 mm. When the float closes the valve due to its buoyancy and no more fuel flows in, the float should have a bottom edge of 29 mm. This test can be carried out in a glass.

These distances apply to BVF carburetors with the following markings:

16N1-8

16N1-11

16N1-12