JeffH,
I have been using 10% nitro 18% oil. (keep in mind I have had alot of gas and glow engines but this is my frist YS and I am learning)
I understand why installing an extra head gasket will lower the compression and this would be helpful especially in a supercharged engine.
Could you please explain why higher nitro is prefered on the YS engines? I'm not doubting your word, in fact I believe I read this a while back before I got the YS, I just would like to know for my own curiosity.
Also when I rebuilt this engine I questioned what the little brass button was for in the regulator. I have no problem in taking it out like you suggest. I was just wondering again for my own curiosity what ist is for.
Thanks,
Roy