Dave, I purchased my YS80 for my Freya on 6/24/02, and while flying it today it has lost alot of power, seems it has lost quite alot of compression. I have used WC 20% Helimix since day one, and OS#8 plug. Can I send it in for warranty work, I still have the reciept showing the date of purchase at 6/24/02. Thanks, Errol