Length of LOB data (78862) to be replicated exceeds configured maximum 65536

The following steps should be performed:

  1. Go to SQL Server management Studio
  2. Right-click a server and select Properties
  3. Select Properties
  4. Go to advanced page
  5. Change the max text replication size to any value you want

Are you using Change Data Capture?

From How to: Configure the max text repl size Option (SQL Server Management Studio)

This option applies to transactional replication and Change Data Capture