Originally Posted by
robotfan
Also there is one suggestion for 15-25% nitro, does anyone disagree with that? 10% is not enough? 25% is not too much? Just checking.
Paul
I think I used as little as 5% up to ~15%. Don't remember using 25% for a Pet .099 back then. I think I propped it with a 7x4. I think I used a 7x6 also but that is a lot of prop for that engine. I would start with the 7x4 and 20% lube. Try different nitro contents and see what works for YOU.
Good luck with it.
George