I just bought a 97 powder extreme with the 600 zrt triple engine. first time took it out started up just fine and ran good throughout the day second time took me about an hour of pulling to get her started and now this last time pulled tull my arms and shoulder were sore.... plugs are new! there is spark at all three cylinders. fuel is turned on and looks like fuel is getting to the carbs. on my first couple of pulls it tried to fire until I tried to give it fuel then die immeditaly then notthing no sign of firing.. tried new plugs still nothing ..... help Please fresh snow in da mountains!