Mercury 305 CID - Cleaning and Inspection

ROCHESTER 4 BARREL CARBURETOR - 5C-1990-823225--1 1096
9. Separate throttle body from float bowl and re-
move gasket.
72121
a - Attaching Screws
b - Throttle Body
c - Gasket
d - Float Bowl
b
c
d
a
FLOAT WEIGHT
1. Assemble float scale to instructions with scale.
2. Check float weight to specifications.
72122
a - Float Scale
b - Float
b
a
3. Replace float if it exceeds specifications.
THROTTLE BODY
1. Remove idle mixture screws and springs.
72123
a - Screw
b - Spring
b
a
IMPORTANT: Throttle body should not be disas-
sembled any further than shown. Throttle body is
serviced as an assembly.
Cleaning and Inspection
!
CAUTION
DO NOT keep carburetor in immersion type car-
buretor cleaner for more than two hours.
!
CAUTION
Rubber and plastic parts, pump plungers and di-
aphragm MUST NOT be immersed in carburetor
cleaner. The Delrin air valve cam will withstand
normal carburetor cleaner.
!
WARNING
Avoid personal injury by always wearing safety
goggles when using compressed air.
1. Thoroughly clean all metal parts in a commercial
carburetor cleaner until all deposits have been
removed. Follow cleaner manufacturer’s instruc-
tions for proper cleaning and rinsing procedure.
Dry parts with compressed air.