I love my '04 super Z 27/60. This year I have really noticed it loosing power on hills. Even if I'm not bagging or if it's on a area I've already cut. It gets to the point sometimes I think it is about to cut off. It bogs down that low. I'm not talking about that steep of hills. When I first got it I was doing alot steeper hills (I really shouldn't have been on). I keep up with the regular maintenance schedule, if not doing everything sooner. I'm at about 500 hours. At 450, a few weeks ago, I changed everything again. The oil, filter, air filter, fuel filters and greased everything again. I try to keep it clean and blow it off everyday. Also it hardly ever starts on the first turn of the key. It useally takes two times if not more. It will just click one time when it don't start. Even if I've just turned it off. I've really just noticed to power loss this year. But the starting thing started last year and has gotten to being a all the time thing. Any suggestions?