Can a toilet become sluggish from just being old

my toilet in spare bath(upstairs)which was added on prior to buying my house(1990) date stamped inside of tank lid is 1987,it's a Mansfield brand,Ive replaced all parts inside tank which required me to remove tank from bowl,due to the plastic threaded valve float being 1 vertical piece but seems it only flushes complete 1 in 3 flushes & I plungered & snaked it,but it still performs poorly& based on the amount of work to replace tank parts,I may as well buy a new toilet& 1 that only uses 1Gal.P.F. Etc. Any simple instructions or guide to swap out toilet

  7 answers
Your comment...