I have New YS 63 mounted inverted, 20/20 fuel, 11.5 x 7 Bolly prop; have posted here before with problems with this engine; dowloaded instructions from performance and followed to the letter; engine starts at 1/4 throttle, will abvance throttle slowly after warming up for 30 seconds at fast idle; good transition and top end, bring throttle back to idle and back to full throttle quickly with fairly good response, but unreliable at times; plane performs well with this engine, lots of verticle, however, when I cut the throttle back to land, the engine will cut out; I have messed with this engine pretty much the whole time since I got it in May, idle for the most part is unreliable, it is no joy flying this plane with such an unreliable engine when it comes time to land, no one likes to deadstick everytime, fortunatley I was landing anyways; would putting an onboard glow that activates at low throttle help, or I keep hearing you tell people to send these engines in because the regulator is sticking; is this the problem with this engine; if I send it in will it be a warranty issue, which should still be valid considering I bought it in May; if this is the case do I contact service for authorization, or what is the procedure. Doug.