Hi, new to this site and just purchased an old 1973 Scamper. Having a few issues with the water heater, Iโm assuming I should be able to turn the knob marked pilot, on and off? Seems to be seized up or maybe Iโm missing something. Some instructions would be handy. Thanks in advance. Hmm, not sure how to add a picture at the moment but itโs a Unitrol.