The age of a specific XJ88TSLEDC Johnson motor would depend on its manufacturing date, which is typically indicated on the motor's identification plate. Without that information, it's impossible to determine its exact age. If you have the serial number or model year, you could look up the production year to find out how old it is.
How old is a Johnson 60 HP outboard motor serial G7050973
I have the same motor on my 1996 Cajun, motor built in 1995.
Johnson 4hp outboard bj4brcud
1965
mine is 1991
1953
23 years old made in 1988
Johnson outboards use the model number to determine the year model of their engines.
1992
1983
1970
the motor is a 1967 outboard