Hi Migraine, The injectors were changed sometime between the WD9 and the 650. I am not an expert but remember a mechanic telling me this. I would not see that as a big concern, because some had head problems with these a lot of heads have been interchanged. A WD9 head will fit on a 650 or vice-versa, so check the head to make sure which you have. These injectors seldom cause trouble and are reasonable to repair. I would guess they have the same air cleaner. Good luck, Chuck
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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