Customers are always wanting to go the cheap route. Here if the cheap carb is failure they still pay for it plus the one that works.
That's what I told her, initially. When I first cleaned this original carb, I told her the float bowl was rusty and it'll need to be replaced petty soon. So after a couple of months, it's running rough. I checked the float bowl and it's rusting faster than I expected. So I told her I wouldn't charge her labor for the R & R this time. (only the part) But if the cheap carb didn't work, then she'd have to pay for the part and labor on the OEM carb.
She was fine with that. So it's all good. She'll be a regular customer. Any loss, I'll make it up over time.
Plus she's my landlord. And reduces my rent $100 each time I mow her 5 acre yard. (with her mower). I'm thinking If I fertilize her yard, I may not have to pay rent til winter. lol