Small Engines (Lawn Mowers, etc.): Oil leaking, john deere s1400, loose screws

Question
I have two trimmers.  One a trim & edge homelite 25cc and the other a John
Deere S1400 30cc.  They both have oil leaking and smoking problems.  Would
changing out all the gaskets fix the problem?  Also, would this be worth doing
or are these disposable trimmers?

Answer
Michael

It may be more complex, but for starters, did you recently refill it from a new batch of gas/oil mix, and if so , what ratio did you use.
Gas burns quicker than oil so an excess of oil might be spewing out and also cause rough running.

Also it Sounds like it could be the crankcase gasket leaking. The oil/gas mixture in 2-cycle leaves some oil in the crankcase over time(especially if you have ran a too rich mixture/old gas etc). As the piston passes the exhaust port it creates compression in the crankcase to force air/gas mixure into the combustion chamber, over time the age of the gasket/vibration/loose screws can let the crankcase gasket start to leak and it blows out the old excess oil. Just replace the gasket and while you have it apart clean off the excess gunk that is in there with carb cleaner spray.