My 2006 Gen VI 496 MAG runs great from initial morning start, but after running a while at Mojave (~106* ambient temp), it is very difficult to start. It begins to fire right away, then immediately dies, almost like a sticky choke or vapor lock condition. Vapor lock is likely not the problem, but the symptoms are similar. The engine turns over and seems like it wants to fire, but idles really slow and dies again. Battery is fully charged. After several attempts it'll finally fire properly and run fine thereafter. No problems restarting after picking up a skier, i.e. shutting down and restarting within 15 or 20 minutes.