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 - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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