Carnt keep ryobi pcn 4545 running when i increse the power

How do you increase the power to an electric saw? By your question, I'm assuming a fueled engine model. Check the fuel filter, air filter, and muffler for any plugging. Check condition of fuel lines and tightness of carburetor fasteners. If no help, turn the H jet needle CCW about 1/4 turn--which should result in the engine 4-stroking. Will the engine now run at speed (but not as fast as before)? If ok, warm the engine up, open the throttle and adjust H CW until the engine speeds up somewhat, but still 4-stroking. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. This produces best power and least heat! Hope this helps!