Cleaning And Inspection; Carburetor Reassembly - Mercury 45 Jet 50-55 Service Manual

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Cleaning and Inspection

1. Carefully inspect carburetor body and fuel bowl for

cracks, stripped threads, plugged or restricted pas-

sages and passage plugs that show signs of leakage.

2. Thoroughly clean all carburetor parts with a mild clean-

ing solution (that will not damage rubber or plastic) to

remove dirt, and varnish that may have accumulated.

3. After washing parts, blow parts dry with compressed

air. Be sure to blow air thru all passages, orifices and

4. Check float hinge in the float pin area for wear and

check float for leaks. Replace parts as necessary.

5. Examine inlet needle for wear. If worn, replace with

new inlet needle.

If removed, install throttle shaft, throttle shutter plate, 2

screws (use Loctite Grade 'A'), and throttle shaft spring

as shown. Install retaining clip on other end of shaft.

a - Throttle Shaft

b - Screws (2) (Torque 6 lb. in. (0.7 N·m)

c - Throttle Shaft Spring

90-817643R1 DECEMBER 1996

Spring tension on stud.

Install mixing chamber cover and gasket as shown.

Install idle mixture screw.

Install bowl vent jet

a - Mixing Chamber Cover and Gasket

b - Idle Mixture Screw

c - Bowl Vent Jet

d - Screw (2) Torque 18 lb. in. (2.1 N·m)

FUEL SYSTEMS - 3A-15

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