Had this problem with both yamaha’s. Trying to get the engine to idle as quietly as possible without stalling out. Once the engine warms up I back off the idle screw slowly until the motor is quiet and running smoothly, then come back to crank it up a few hours later and it does not crank. What i’ve done in the past is slowly tighten the screw (trial and error) until the engine cranks and then just leave it at that setting. Are there any easier ways to fix this problem?