PW50 Oil Pump Leaking Premix

I'm freshening up an old PW50.  I got the oil injector pump hooked back up and it's working, but it leaks.  I found a couple quarter size puddles of premix oil on my garage floor from sitting overnight.  It's hard to tell, but it appears to be coming out of the pump mechanism somewhere.  The inlet and outlet hoses seem fine. 


Any ideas? 

Clean the pump really well, then spray it with brake cleaner or carb cleaner to dissolve any residue, let it sit over night and then take a handful of flour and blow it towards the pump. It should stick and get kind of dark where the oil is leaking from.

If you still can't find it, just put a drip pan under it and forget about it.

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