OS 50 sx two-stroke problem
Bax, I'd much appreciate your help,again, please.
This time it's my OS 50 sx. It's nearly 5 years old, although it hasn't had that much use, and is being run on Model Technics 10% nitro fuel [which has 20% oil in it]. It is positioned upside down on the model.
All of a sudden it is 'wavering' at mid to full throttle quite noticeably, and is clearly not at all happy. I've changed all the plumbing tubes [and inside the tank, too], cleaned out the carb and changed the plug [an OS8] and tried different prop sizes/pitches. Nothing seems to work.
Any thoughts, please?