See Figure 1
This carburetor is used on the 4-151 engine.
ADJUSTMENTS - Float
See Figure 2
- Remove the air horn.
- Hold the float retainer and push down lightly on the float.
- Using a T-scale, at a point 3 / 16 in. (4.76mm) from the end of the float, measure the distance from the top surface of the float bowl to the top of the float. The distance should be 0.208 in. (5.28mm) with manual trans., 0.256 in. (6.5mm) with automatic trans., and 0.208 in. (5.28mm) for all Calif. E2SE models.
- Bend the float arm as necessary to adjust.
See Figures 3 and 4
- Make sure the choke coil adjustment is correct and that the fast idle speed is correct.
- Obtain a Choke Angle Gauge, tool #J-26701-1 or its equivalent. Rotate the degree scale to the 0° mark opposite the pointer.
- With the choke valve completely closed, place the magnet on the tool squarely on the choke plate. Rotate the bubble unit until it is centered.
- Rotate the degree scale until the 25° mark is opposite the pointer. On carburetors with choke cover sticker number 70172, the angle is 18°.
- Place the fast idle screw on the second step of the cam.
- Close the choke plate by pushing on the intermediate choke lever.
- Push the vacuum brake lever toward the open choke position until the lever is against the rear tang on the choke lever.
- Adjust by bending the fast idle cam rod until the bubble is centered.
See Figure 5
Once the rivets and choke cover are removed, a choke cover retainer kit is necessary for assembly.
- Remove the rivets, retainers, choke cover and coil following the instructions found in the cover retainer kit.
- Position the fast idle adjustment screw on the highest step of the fast idle cam.
- Push on the intermediate choke lever and close the choke plate.
- Insert the proper plug gauge, 0.050-0.080 in. (1.27-2.03mm) for manual trans. and 0.85 in. (21.6mm) for automatic trans., in the hole adjacent to the coil lever. The edge of the lever should barely contact the plug gauge.
- Bend the intermediate choke rod to adjust.
See Figure 6
- Obtain a Carburetor Choke Angle Gauge, tool #J-26701-1 or its equivalent. Rotate the scale on the gauge until the 0 mark is opposite the pointer.
- Close the choke plate completely and set the magnet squarely on top of it.
- Rotate the bubble until it is centered.
- Rotate the degree scale until the 32° mark is opposite the pointer. On carburetors with choke cover sticker number 70172 the setting is 19°.
- Hold the primary throttle valve wide open.
- Bend the throttle lever tang until the bubble is centered.