EETC Carburetor Service and Repair 3

Question 1

What is the most common cause of a carburetor flooding condition?

Accepted Answer

A damaged or stuck float or needle valve not closing properly

Answer

A clogged or undersized main jet

Answer

An idle mixture screw set too lean

Answer

Excessive wear on the throttle shaft bushings

Question 2

During carburetor overhaul, which cleaning method should NOT be used on rubber or plastic components?

Accepted Answer

Soaking in a strong chemical carburetor dip solution

Answer

Cleaning with warm soapy water

Answer

Rinsing with mineral spirits

Answer

Wiping with isopropyl alcohol

Question 3

Ethanol-blended fuel left in a carburetor for an extended period commonly causes what problem?

Accepted Answer

Corrosion of metal passages and deterioration of rubber and plastic components

Answer

Increased fuel efficiency due to higher octane content

Answer

Improved cold-weather starting performance

Answer

Reduced varnish and gum deposit formation

Question 4

A completely clogged idle circuit jet will most likely produce what symptom?

Accepted Answer

Engine idles but stumbles or dies when the throttle is opened slowly

Answer

Hard starting only, with normal operation once running

Answer

Engine runs smoothly at idle but bogs badly at mid-throttle

Answer

Engine stalls only at wide-open throttle under heavy load

Question 5

When inspecting a carburetor body, which condition requires replacement of the carburetor rather than repair?

Accepted Answer

Excessive throttle shaft bore wear causing an air leak

Answer

Varnish deposits coating the inside of the fuel bowl

Answer

Clogged jets that restrict fuel flow

Answer

A dirty or clogged air filter on the inlet

Question 6

What is the correct torque practice when reinstalling a carburetor float bowl?

Accepted Answer

Tighten to the manufacturer-specified torque using a calibrated torque wrench

Answer

Tighten as firmly as possible to ensure no fuel leaks

Answer

Hand-tighten plus a quarter turn for a snug seal

Answer

Apply thread-locking compound and torque firmly

Question 7

After completing a carburetor overhaul, what is the correct sequence before attempting to start the engine?

Accepted Answer

Install the carburetor, set mixture screw to baseline position, connect fuel, then start and fine-tune

Answer

Start immediately at full throttle to clear the fuel passages

Answer

Pre-fill the float bowl with a syringe before bolting the carburetor to the engine

Answer

Advance ignition timing two degrees before installing the serviced carburetor