I am having no luck getting the wrc ibef (from Troy built models) to work with my 9503 radio. I hav tried all sorts of different end points and channel reversing and have tried it on different channels in the receiver with no luck getting the light to come on and send power to the ign. Did a google search and found somebody else with the same problem but that thread did not end with a solution. Anybody out there run into this problem and have a solution they can share. I don't know the model of the receiver but it is the 9ch that comes with the 9503.