2001 Bombardier DS 650 Shop Manual 704 100 011, Page 96Get this manual
Section 04 FUEL SYSTEM Subsection 03 (CARBURETOR AND AIR INTAKE SILENCER)
Carburetor body and jets should be cleaned in carburetor cleaner following manufacturer's instructions
WARNING
Solvent with low flash point such as gasoline, naphtha, benzol, etc should not be used as they are flammable and explosive90
Carburetor Float Level Adjustment
Correct fuel level in float chamber is vital toward maximum engine efficiencyTo check for correct float level proceed as follows: Remove float bowl no8 and gasket no9 from carburetor Make sure that float arm no10 is symmetric, not distortedWith carburetor chamber up side down: Measure height between bowl seat and the top edge of float armUse float level gauge (PN 529 035 520) Keep float level gauge perfectly vertical and in line with main jet holeEnsure that both float level gauge tips are properly positioned on carburetor body and that "L" arm is leaning on float with compressing valve springRefer to following photos for proper float level gauge positioning