Again, thank you guys for the comments so far. That's right, I need to provide pictures with better lighting. I hope the following two pictures are more useful.

Also, this is how I have adjusted the engine so far:

1. The engine was bought new from Aircraft International two and half years ago.
2. I broke it in with Lawn Boy at 1:32.
3. Then I switched to Amsoil at 1:50.
4. I have leaned the high end needle about 1/8 turn.
5. I have never touched the low end needle.
6. This engine is on a 33 pounds Ziroli P-40. I fly very conservatively. My flights are usually short, about 5 to 10 minutes.

Thanks again. Hopefully with the better pictures and a short history about this engine, I can get more help from you guys.