Mercury 305 CID - Air Valve Dashpot; Air Valve Spring Windup; Float Level

5C-6 - ROCHESTER 4 BARREL CARBURETOR 90-823225--1 1096
Air Valve Dashpot
1. Seat vacuum break diaphragm and close air
valve completely. Bend rod to adjust gap to speci-
fications.
72091
a - Push in Completely
b - Bend Here to Adjust
c - Specified Gap
d - Fully Closed
b
c
a
d
Air Valve Spring Windup
1. Rotate gram scale until air valve begins to open;
check scale reading for correct specifications.
72092
a - Carburetor Casting
b - Gram Scale
c - Contact Area of Arm on Air Valve
d - Rotate
b
c
d
a
2. To adjust spring windup, hold tension spring
screw and loosen Allen head screw.
3. Adjust tension and retighten allen screw secure-
ly.
72093
a - Increase
b - Decrease
c - Screw
b
c
a
Float Level
1. Start engine to fill float bowl, run at idle and insert
float gauge into hole next to flame arrestor stud.
72083
a - Gauge Hole
b - Gauge
b
a