SUB-EGR Valve Cleaning

Remove the Sub-EGR valve from the carburetor and clean as described.





1. Push the Sub-EGR valve pin in the direction shown until it stops. Raise the lever to disengage it from the pin.





2. Remove the valve from the carburetor.

Note:
If the Sub-EGR valve will not come out of the carburetor, remove the snap ring from the Sub-EGR valve pin. Then carefully remove the pin and the link, taking care not to lose the spring and steel ball from the valve. Insert a small phillips screwdriver in the pin hole for use as a handle. Loosen the carbon deposits by spraying carburetor cleaner into the Sub-EGR valve passages. Then, remove the valve from the carburetor.

3. If removed, install the spring, steel ball, pin and snap ring.

Note:
If needed, a steel ball and snap ring are included in the EMR-92-011 emission kit.





4. Wet a piece of fine crocus cloth and cup it in the palm of your hand. Clean the valve by twisting it in the crocus cloth (Figure 17)...





... or, if no crocus cloth is available, use the round brass brush and carburetor cleaner (Figure 18).

CAUTION:
Do not clean the valve with a steel wire brush or wire wheel as it may scratch the valve. Scratches will allow carbon to build up on the valve quickly.





5. Clean the plunger hole in the carburetor with carburetor cleaner. Insert a round brass brush into the Sub-EGR valve bore and clean the plunger hole. Use the round brass brush to clean the underside valve passages.

CAUTION:
Do not use a screwdriver or a steel bristle wire brush in the bore of the Sub-EGR valve since this will scratch the bore and cause carbon to build up on the valve quickly.






6. Dry the valve and plunger hole thoroughly. Re-install the Sub-EGR valve in the carburetor. Connect the valve linkage to the pin and carefully seat the rubber boot onto the carburetor.