Hi i just got an OS 12TZ [P]-T3 brand new 2weeks ago i ran about 8 tanks in was running sweet no overheating and running 16% nitro
But the foll week its not starting changed plugs and nothing turns out no compression AT ALL [X(] i mean what the hell
Iwont be buying an os again thats for sure [:@] realy PISSED of with OS NOW

If the engine has no compression, that means that the piston/liner fit has become too loose. That's caused by an overheat, foreign object ingestion (dirt damage), or improper breakin. Both are very common things to happen to R/C car engines. Overheating is caused by low-oil fuel, dirt coating the outside of the engine--prevents good cooling, a too-lean needle stetting, air leaks in the fuel system, running high RPM with poor airflow over the engine, any running at all with bad airflow over the engine, and so forth. Dirt damage is self-explanatory, and can be prevented by using a good-quality air filter that is properly maintained.

Problems with your engine may or may not be covered by the warranty. It depends upon what actually caused the difficulty.

We've seen many engines damaged by improper breakin. You can only break in an engine while it's being run. You cannot have an engine sit and idle for several tanks' worth of fuel and expect it to last. Many "experts" use such a method, and it may be good for a race weekend, but don't expect long life from an engine.

A low-oil fuel can also contribute to shortened life because the engine just won't get enough oil for good longevity.

Many, many factors are involved. Don't necessarily believe it's only the engine at fault.