HRC2163HXA. The 1st serial # is MAKA 1077993 and is the one with the issue. The other #MAKA 1059147
Tim
Tim, both of those are in the effected range of mowers that
could have the "unintentional Roto-Stop Disengagement" problem. The only way to know for sure is to have them fully inspected and evaluated by a Honda dealer. Since these mowers are out of warranty, Honda handles possible goodwill on a case-by-case basis. When you arrange to have the mowers inspected, have the dealer refer to Honda Lawn Mower Service Bulletin #91 from November 2009. Mention to the dealer you understand some goodwill / help maybe available, but please understand it must happen after the units have been inspected, and the dealer may need to contact Honda's Dealer Techline for authorization to process any out-of-warranty goodwill repairs.
To find a dealer in your area, use this link; be sure to check off MOWERS and enter your ZIP code:
Find A Honda Dealer
The fix can vary a bit; in minor cases, a precision bend/modification to a contact point near the Roto-Stop button can solve the problem. In more severe instances, a complete replacement of the handlebar is required.
Best of luck Tim!