The motors that are missing the recoil starter are missing the right top nut because it's part of the starter assembly, the nut can't be removed separately .
I couldn't find a 1/2 inch UNC nut here so just put a tap in a slightly smaller nut taking it out to 1/2 inch UNC ( 13 TPI)
The nut was a little tight to thread on the first time with a spanner but it threads on and off by fingers now.
So if the 1/2 UNC nut is tight you may have to put a tap in the nut or a 1/2 inch UNC Die nut on the crank.
