25 hp Mercury Difficult Cold Start
 

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.

If you look closer, I think you will find a push/pull knob for choking the
engine. Not the idle adjuster you are turning.

--
Bill
Chesapeake, Va


"doctormdds" wrote in message
...
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.

Bill,
The push-pull choke knob is also used to adjust the idle by turning it. It
is turned clockwise to increase engine speed and counterclockwise to
decrease it. Starting instructions suggest turning the choke knob fully
clockwise for starting and then decreasing engine speed as desired after it
is started by turning the choke knob counterclockwise. I feel my problem is
that with the knob fully clockwise, engine speed is still at an idle and not
significantly increased. I appreciate your response Bill.

Stan

"IBNFSHN" wrote in message
news:Ms19d.3052$TY2.1256@lakeread04...
If you look closer, I think you will find a push/pull knob for choking the
engine. Not the idle adjuster you are turning.

--
Bill
Chesapeake, Va


"doctormdds" wrote in message
...
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.

On Wed, 6 Oct 2004 22:01:17 -0400, "IBNFSHN" wrote:

If you look closer, I think you will find a push/pull knob for choking the
engine. Not the idle adjuster you are turning.

======================================

I thinks it's the same knob on my 15 hp Merc. I'll have to go check
in the morning. If so, pull the knob out all the way and crank for a
few seconds. It should start right up. Push the kob in half way and
run for a few more seconds until it starts to smooth out, then push it
in all the way..

On Wed, 6 Oct 2004 21:12:00 -0500, something compelled
"doctormdds" , to say:

Bill,
The push-pull choke knob is also used to adjust the idle by turning it.

It's not a choke, it's a primer. Pull it out and push it back
in. I do it twice, and have no cold engine starting problems.

It
is turned clockwise to increase engine speed and counterclockwise to
decrease it. Starting instructions suggest turning the choke knob fully
clockwise for starting and then decreasing engine speed as desired after it
is started by turning the choke knob counterclockwise. I feel my problem is
that with the knob fully clockwise, engine speed is still at an idle and not
significantly increased. I appreciate your response Bill.

Stan

"IBNFSHN" wrote in message
news:Ms19d.3052$TY2.1256@lakeread04...
If you look closer, I think you will find a push/pull knob for choking the
engine. Not the idle adjuster you are turning.

--
Bill
Chesapeake, Va


"doctormdds" wrote in message
...
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.