My B&W 150 wont accelerate above 5000 rpm. The throttle cable is correctly adjusted. I replaced the 13g rollers with 11.5g rollers and still no difference. The belt is new. The spark plug is new. I put new premium gasoline in it. Suggestions?
I read some other threads and will look into possible vacuum leaks - lines, intake manifold, diaphragm. thx.