Originally Posted by
Mixedreef89
Wow this is great guys. I'm so thankful for all the help so far. I know I've got a lot to learn. I'm just glad to see everyone helping out. That's what makes hobbies worth it. So I've got a question I know I could Google but I like getting my knowledge straight from the source. How do I tell what prop is on the plane now. Do I need to replace it or would this be a good one to use? And we fished going through the house and we found nothing else for the plane except a spare wheel lol. I have plenty of wall timers from when I first started my reef tanks. Now they sit in a box cause I built a wifi controller for them. So I tore the engine apart today and it looked pretty bad inside. I would take pics but I can't get either of my cameras to adjust to it no matter what light. I'll try again tomorrow.
I don't recommend taking engine the apart. Only reason to do that is if you suspect bearing failure or other internal damage. You may introduce air leaks that were fine before the tear down.
The prop size is printed on the outside face behind the prop nut and washer. It might look like 10-06 in fine print. Nothing wrong with a 10-6 on a 40FP. It is a middle-range speed prop. But like myself and others have suggested, an 11-4 will keep the speed down, good for a new pilot. Getting working radio gear and a local instructor are higher priority.