Honda engines have never been used in any of these machines. That is a re-power.
Things that make you go Hmmmmm.
I have heard references to 6020 loaders with Honda engines, but never ran across one.
I have a wholesale dealer price list from 2005 that shows part numbers for 6020 and 7020 with Kohlers.
In the Bucket and attachments section, look at the 7th entry (for the belly mower
The (3,4) refers to a footnote and the footnote says:
(4) For Field Installation on 6020 Honda Unit, Order C47304 Wiring Harness
So, is the footnote a typo?