Cleaning & Inspection

1. The following parts should not be placed in carburetor cleaner:
a. Rubber parts, electrical solenoids, plastic parts, vacuum diaphragms and pump plunger. The plastic cam on the air valve shaft and the bushing in bowl will withstand normal cleaning. Rinse thoroughly after cleaning.
b. Choke coil and cover assembly.
c. Fuel filter.
2. Thoroughly clean all metal parts. Ensure all passages and metering parts are are free of burrs and dirt. Do not pass drills or wire through jets. Blow dry all parts and passages with compressed air.
3. Inspect upper and lower casting surfaces for damage. Replace as necessary. If float bowl requires replacement, and bowl contains the letters ``MW'' on casting next to fuel inlet, the float bowl contains a machined pump well. When float bowl or pump requires replacement, ensure parts specified for this application are used.
4. Thoroughly inspect all internal parts for damage, wear, burrs, binding or distortion.
5. On E4MED models, check dual capacity pump system as follows:
a. Fill float chamber and pump well with clean solvent, then seal the two pump discharge passages on top of float bowl with two fingers. Push pump assembly downward into pump well. Pump assembly should not fully bottom in well. If pump assembly bottoms fully, check pump cup for wear or damage and pump well for wear or scoring.
b. Check for solvent leaking through or around pump discharge plug or pump valve assembly. If bubbles are evident around plug or valve area, plug or valve may be loose or damaged, or gasket under valve may be missing or defective.
c. Seal pump discharge passages of float bowl as outlined in step a, then apply 12 volts to pump solenoid connector. Pump assembly should move in well as solvent bypasses through open valve assembly. If solenoid does not energize when voltage is applied, check for short or open circuit. Replace solenoid if defective.
d. Refill float chamber and pump well, then push pump assembly downward into well until solvent is visible at top of pump discharge passages. Remove pump assembly while observing solvent level. Level of solvent should not drop. If level drops, pump discharge or pump valve assembly check ball may be incorrectly seated or damaged. Repair or replace as necessary.