Here is a very nice and hard to find cam gear for a small Associated or United hit and miss engine. I’m not exactly sure what size of engines this will fit so please check the measurements. It has to be half the diameter of your crank gear and have half the number of teeth. Check out the pictures and see if you need it. The mounting hole is about 25/32 in diameter. Thanks for looking at this listing! If you want to check out my reputation and such please feel free to google search my name. My name and address is. 14316 State Route 281. If you can find a way to talk to me with your voice you will almost always get a quick response. If you message me please try not to sound like a caveman. I have terrible grammar myself so I understand but sometimes it is very difficult to comprehend what some people write. If I make a mistake on my measurements or you feel something is not as described please let me know and I will try to make it right. I think most all of my customers with a normal level of sanity are happy. I think most people would agree that I do an extremely good job of packing items so I guess it’s worth the wait. Check out my other items. Be sure to add me to your favorites list.