the part number is 0C8127 ( it's zero and in the number, not O as in the letter)
Ther fram part number is CA101
I cannot find a cross reference on a Purolator, Amsoil, or Fram filter for this number filter. I suggest you write down the Generac filter model # and go to your local auto parts store. They will be able to cross reference it to the filters they sell.
Generac Filter OC8127 is a 1st choice Wix Filter 49227 http://www.wixfilters.com/filterlookup/PartDetail.asp?Part=49227 Last choice Fram CA101 http://www.power-21.com/FramPower21i/PartDetailWindow.aspx?b=F&pn=CA101 The Fram CA101 has a slightly smaller inside diameter opening than the General 0C8127 Air Filter
I have found a filter, available from NAPA, which seems to match perfectly. NAPA's part number is 7181; the WIX number is 57181.
From what I can find on-line the Generac part number OG02070100 is an obsolete part number which was replaced by an OE7080. The same source lists the equivalent NAPA part number as 1762. Fram's website lists a conversion of the Napa 1762 as a Fram PH3600.
Wix 46033. Www.Wixfilters.com
Cross reference hydro-gear filter number 52114
cross reference from a JD LVA12812 filter to ?
What is the cross reference number for a kubota diesel oil filter #16271-32090
I cannot cross reference it without knowing the brand of filter this number you list applies to.
The Fram website crosses the generac 070185B to a Fram PH4967 but mentions this should be verified.
Cross reference John Deere oil filter GY20577 to Briggs and Straiten filter number?
You can find a cross reference to this number at Fluitek in the related link.