If it is fine keep it flying.. absolutely.
Those 25 hours is a arbitrary amount of time determined by place and context. The same turbine in Germany has a 50 hours revision time.
It is fairly common to find old jetcats between 50 to 100 plus hours and working as good as new. (in fact in some cases, better than new, lol)
However if you hear or see something that seems that is not ok, send it to service no matter it has only 2 hours running time.
best regards, Enrique.