Anyone else had an early clutch fry running double blades. I have a lazer z with a 23 horse Kholer and a little over 400 hours.One of my guys says to me "that mower is making funny noises". I look over and there are sparks shooting out of the clutch. My fear is that the 2 blade set up may be at least partially responsible. Interestingly, the replacement clutch is a Warner unlike the original equipment on this mower in the year it was built. The new z's come with warners. Perhaps exmark had some trouble with these. I have another z ( with new style clutch) but dont want to shell out the 300.00 for a new clutch every season.Any similar experiences?