On the left side of carb (drivers side) is the fuel enrichment valve. Follow the 2 wires to the plug end. With a volt meter connect the neg. lead to the green. wire and positive lead to the yellow wire. Do not unplug just push the leads into the end of the plug making sure contact is made with metal wire end. Start the engine and check that you are reading voltage. If no voltage is present then you will need to trace both wires to find the problem. If voltage is present then remove the enrichment valve by removing the 1 or 2 small clamp screws securing the valve. with valve removed unplug from harness then using jumper wires connect the green to negative and yellow to positive directly to a battery. In 2 - 3 minutes the needle should completely extend. Looking in the bottom end you will notice a spring which will compress as the needle extends. That spring will be totally compressed when needle is fully extended. If not totally compressed or needle does not extend your enrichment valve will need replacement. One other thing to check and I would do first due to its simplicity is remove the fuel cap and inspect the underside to look for any deformation of the plastic which will look as if melted at the same time shaking to hear if check ball is rattling. If deformed or ball does not rattle the cap is bad not letting the tank vent and will need replacement. Let us know the results.
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