I am very happy with the performance of the lawnmower but i can't seem to get parts for it. My dealer said that he would order all the general maintance parts when i bought it but now he can't seem to get them. I called another gravely dealer but he doesn't sell the gravely with a wisconsin robins engine.But he said he will try to get the air and oil filters. He also let me talk to his mechanic who told me that if i go over 70 hours with out a oil change my engine will burn up. I am at 72 hours and I have alot of grass to cut. so my questions is do any of u know where i can buy the parts off the net. i have emailed gravely but they have not responded. my lawnmower is a gravely 260z with a 22hp robins engine. i started ordering these parts when i bought it the dealer told me he would have the parts over night if i needed them.