I have a 1991 johnson 200hp model J200TXEIB that the electric choke is not working. I replaced the ignition switch but did not fix the problem. The engine will not start without priming it first, but runs and starts great after you run it 20 or 30 seconds. I need to know where to start to repair the choke problem? I know it has a primer solenoid and have located it but do not know how to test or repair. Any help appreciated....