I got a nice running old 900B last summer, had been sitting for some time. I changed the oil and used it some on the plow days, and pulled it some. Just changed the trans/rearend oil yesterday- what a milkshake mess. Anyway, I figured I should change the engine oil again since running it for around 15 hours after it sat for so long. I don't have an owners manual, but I do have an I&T manual. I noticed the clutch housing drain plug, and assumed I should drain it along with the engine oil, right? And the clutch housing should refill on its own? That's what I understood from the manual. Any advice is appreciated. Thanks-