18. MOVIE CARBURETOR EURO 3 MOVIE SYSTEM Check top cap and spring for cracks and damage. Top Cap Spring Check the diaphragm (1) of the coasting enrichment valve for tears. Check the spring (2) and cover (3) of the coasting enrichment for damage. Jet Needle Check jet needle, needle jet, slow jet, needle Pilot Screw jet holder, main jet and pilot screw for bends, wear and damage. Needle Jet Needle Jet Holder Main Jet Slow Jet 18-12