I am new to using a 4 stroke outboard for power, I have been using inboards. My question is, what kind of RPM do you guys cruise with? What is a safe range for an outboard? I have a Yamaha F150. With my inboards, I always cruised between 3000-3400 rpm, but had heard of guys in the 4000 range, I would rather cruise on the low side to save fuel and wear and tear on the engine.