I recently purchased a boat with a 25 hp Mercury outboard. I am unsure the
age of the oatboard but it looks to have been well taken care of. The motor
is difficult to start when cold but starts very easily when warmed up. The
motor has a choke knob which you can turn to increase the throttle setting
while the engine is not in gear. Otherwise, when the tiller handle "speed
control" is twisted one way or another to increase engine speed, the
propeller is automatically engaged. My situation is that when the choke
control knob is turned fully clockwise it hardly increases engine speed at
all. Should turning the knob clockwise dramatically increase engine speed
when the motor is in neutral? If so, I feel that is my problem with a cold
start as the engine is at a low idle speed when attempting to start it. How
can I make an adjustment to increase the starting engine speed? I
appreciate anyone's help that is familiar with this motor.