I have a Deere 727 w/ 550 hours and well maintained. Today the engine started surging. Acting just as it would if it were getting low on fue. Messing with the choke would help. Then it would stop. 10 minuter start up again. No rhyme or reason. Seems similar to what happended with my 17 Kaw on a SCag few years back. Any ideas?? Yes, it's under warranty but to drive across town and have it not act up for the dealer(ie 17hp) just becomes a complete wwaste. Looking for a bit of education.