i have a 2006 Suzuki 250 EFI FourStroke/250 hp, V6 and after about 2 years of of only about 10 hours of use. i started using and it is trying to stall between 3900-4200 rpms. i runs great between 4500-6000 rpms. and also starts very well. i am going to check the fuel water separator. and i also have an issue with the shifter were sometimes it wont start the engine