Help! I'm reassembling an MC21 for a friend, but know very little about it. Got the clutch installed and the cover on using an on-line parts microfiche as a guide, but when I fill the 2-stroke oil tank it drains down into the clutch cover. Trying to see how it works, it makes no sense to me at all. Can anybody tell me how the injector pump works and what might be wrong?

TIA,
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