Here's a link that will display the 1998 Jayco Travel Trailer and Fifth Wheel Owner's Manual
. The manual is in .pdf format.
On page 58 of the manual it discusses the operation of refrigerator models that were available that year.
In 1999, the Norcold N641 (6 Cu. Ft.) and N841 (8 Cu. Ft.) refrigerators replaced the 9100 and 900 series refrigerators in their Eagle travel trailers and fifth wheels.