I bought a 1988 Jet ski 550 and the carb is not getting fuel. I cleaned out the carb but noticed there is a valve attached to the hull with two wires going to it and three fuel lines linking through this valve. I think this valve is the "ON" and "RES" fuel switch. How can I test if it is working properly? This valve has three hoses going to it but not sure if I can bypass the valve so I can test to get the engine running. Note the jet ski has been stored for about 8 years and it turns over and has spark and compression but it's not getting any fuel at all. Thanks for your help.