'02 MB Sports 190. 575 hours. PCM 5.7 HO. (Great motor btw!) Maintenance is anal with me as these boats aren't cheap and should last a long, long time with proper care. As others have said, oil and filter get changed every 50 hours, Fuel filter every other year. Plugs, rotor, cap, etc. about every two years. Transmission fluid at the end of the season. Buy a suction device to remove the old stuff through the dipstick and save it to a measuring cup so you put back in the same amount. I used to change the impeller every other year but found my new one (installed Spring '08) was already deterriorating early last summer so now it's every year. I checked shaft alignment around 500 hours and it was perfect so I'll go another 500 hours. I also found that T-9 Boeshield is a great preservative for metal. I spray it on the propshaft (inside and outside the boat). It leaves an invisible waxy film so no rust spots on anything. RPG