5C-20 - ROCHESTER 4 BARREL CARBURETOR 90-823225--1 1096
2. Using compressed air, blow out all passages in
carburetor to remove any foreign material.
3. Wipe off all parts that cannot be cleaned in
carburetor cleaner with a clean, dry cloth.
4. Carefully inspect all carburetor parts for wear and
damage; pay particular attention to the following:
• Idle mixture needles
• Float needle and seat
• Casting surfaces
• All levers
• Fast idle cam
• Power piston
• Accelerator pump seal
5. Check all valves for binding.
6. Check vacuum break unit for leaks as follows:
a. Depress plunger and seal hose connection.
72124
a - Plunger
b - Hose Connection (Hidden in This View)
b
a
b. Maintain seal on hose connection; plunger
must remain seated. If plunger extends, re-
place unit.
72125
a - Hose Connection
a
IMPORTANT: The idle fuel pickup tubes have a
smaller I.D. at the bottom than the top. Do not
drill.
7. Clean idle fuel pickup tubes with a fine wire of ap-
proximately .020 in. (0.5 mm) O.D. and blow out
all channels with compressed air.
72117
a - Idle Fuel Pickup Tubes
a
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