C152 has a Lycoming O-235 which has a longer TBO

snip

But, no matter how you dice it, TBO is 1800 hours max. The 152 could have
at most 2400 hours, but you had to do something to the engine to gain the
additional hours. I'm not sure, but I think it had to have different
pistons? Somebody would know for sure, I don't since I fly behind an
o-200 myself and am only familar with it.