Problem with air/fuel adjuster on 1989 Itasca Sunflyer.

Ok, thank you for the tip. I will pass it on to my mom, though she is very stubborn and insists that the air adjuster just needs to be adjusted carefully, which I've already tried numerous times, and, that nothing needs to replaced lol. Tough to reason with someone who just doesn't want to spend any money to fix the problem. I'll see what I can do. Thanks for your help!