Chrysler 75 and 85 HP Outboards Service Manual OB 3646, Page 40Get this manual
Subsection
CARBURETORS
GENERAL
This subsection describes the adjustment, disassembly, repair, and reassembly of the carburetorsFuel enrichment is controlled by calibration of the choke shutter plateThe shutter plate may contain areas open to atmosphere or the top half may be spring hinged to open during heavy vacuumEither method can raise or lower the suction at the discharge ports increasing or reducing fuel delivered depending on open areas or hinge spring tension Figure 1