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'78 Mercury 402 40hp

Motor will not stop running when key is turned off. Have to choke it in order to kill the engine.

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 5467 Answers

SOURCE: turn the switch off motor keeps running

It sounds like there is a short in the alternator or wiring for alternator. You are continuing running with the battery cut off. But the outboard generates its own power and its finding the way to the ignition. As for grounding, you may be idling too high for a quick shut off.

Posted on Jun 18, 2009

  • 1 Answer

SOURCE: 1993 40 HP 4 cyl. Mercury outboard: Running along

I solved it with no help from the professional assistant team. Thanks for no help till I send money...DON'T THINK SO!!! Thanks for wasting my time.

Posted on Sep 04, 2009

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SOURCE: Evinrude 3.3 does not run proper when the choke is off

It sounds like the manifold vacuum is low. This would mean the engine is getting more air than it needs and can not create the vacuum for fuel draw. When you choke it, the outside air is reduced and the vacuum goes up and more fuel is drawn in enriching the mixture. The raw gas can not atomize without the vacuum. You swing the other way when you dump gas without the choke.

If you can find a vacuum port to attach a vacuum gauge, you turn the airmixture screw until you have the most vacuum(highest) and then turn the mixture screw in until the vacuum just starts to drop. This is the optimum setting. Marine shops also use flow (meter)flaps to balance multiple carbs on a motor like they do on motorcycles.

You could get the timing checked because this will affect vacuum draw too. This site is suppose to have free manuals, but you may have to Browse the internet for other sources.
Let us know how you made out.

Posted on Sep 18, 2009

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1 Answer

How do you start it up


Make sure there is fuel in it.
Put the transmission in neutral.
If it has a choke, set it full on.
Make sure engine kill switch is in RUN position.
Turn key to on position.
Press START button.
Noise you hear should be engine starting.
Stop pressing start button.

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1 Answer

Motor wont turn off with key


Could be broken wire in loom,or bad connection in loom plug or faulty ign switch which is very unlikely

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The choke reduces the air flow into the carb. If you are having problems with the choke off, it means that not enough fuel is getting into the engine and it is running lean. When you choke it, the reduced air flow causes the mixture to be correct and it runs fine.

Feb 09, 2014 | Ridgid Rd80702 3300 Psi 3.0 Gpm 7 Hp...

1 Answer

Sym red devil feels sluggish


Instructions
    • 1 Locate the red button on the top of the handlebars. This is called the "kill switch." When you pull it up the engine can run; when you push it down, the engine will shut off immediately.
    • 2 Pull the kill switch up.
    • 3 Turn the key to the "on" position.
    • 4 Make certain the cord running from the key is attached to the steering column. This device acts in the same manner as the kill switch - the engine will run only when it is secured.
    • 5 Pull the start cord, which looks like an enlarged lawnmower pull-cord and is generally found on the right side of the machine.
    • 6 Listen to the engine - if it starts, let it get going slowly . If it "pops" but does not continue to run, try pulling the start cord a few more times. If you do not hear the engine turn over at all, proceed to the next step.
    • 7 Find the pull tab under the right side of the handlebars. This is called the choke - it often has a circle with a diagonal line through it. The choke helps to start an engine when the weather is very cold or the machine hasn't been used in a while. When using the choke, try leaving it on only long enough to hear the engine fire a couple times, then return it to the "off" position. A choke left on too long can flood the engine.
    • 8 Place the choke in the vertical position - this is called the half choke position. Pull the start cord several times. If the engine fires up, place the choke back down to its original position and let it slowly warm up. If the engine still has trouble starting, proceed to the next step.
    • 9 Pull the choke 180 degrees from its original position - this is called the full choke. Pull the start cord until the engine sputters a couple times.
    • 10 Replace the choke to the original off position and continue to pull the cord. The engine should fire up and settle into a steady hum, ready for fun in the snow.

Jan 15, 2013 | Motorcycles

1 Answer

Sym red devil feels sluggish


Instructions
    • 1 Locate the red button on the top of the handlebars. This is called the "kill switch." When you pull it up the engine can run; when you push it down, the engine will shut off immediately.
    • 2 Pull the kill switch up.
    • 3 Turn the key to the "on" position.
    • 4 Make certain the cord running from the key is attached to the steering column. This device acts in the same manner as the kill switch - the engine will run only when it is secured.
    • 5 Pull the start cord, which looks like an enlarged lawnmower pull-cord and is generally found on the right side of the machine.
    • 6 Listen to the engine - if it starts, let it get going slowly . If it "pops" but does not continue to run, try pulling the start cord a few more times. If you do not hear the engine turn over at all, proceed to the next step.
    • 7 Find the pull tab under the right side of the handlebars. This is called the choke - it often has a circle with a diagonal line through it. The choke helps to start an engine when the weather is very cold or the machine hasn't been used in a while. When using the choke, try leaving it on only long enough to hear the engine fire a couple times, then return it to the "off" position. A choke left on too long can flood the engine.
    • 8 Place the choke in the vertical position - this is called the half choke position. Pull the start cord several times. If the engine fires up, place the choke back down to its original position and let it slowly warm up. If the engine still has trouble starting, proceed to the next step.
    • 9 Pull the choke 180 degrees from its original position - this is called the full choke. Pull the start cord until the engine sputters a couple times.
    • 10 Replace the choke to the original off position and continue to pull the cord. The engine should fire up and settle into a steady hum, ready for fun in the snow.

Jan 15, 2013 | 2008 Sym Jet Red Devil 50

1 Answer

Finally started my 79 suzuki TS 250 and it wouldn`t stop. There`s no kill switch. I had to turn off the fuel and let it run out. Kind of worried about starting again. Tried starting it again, but having...


To stop a dieseling two stroke motor you can either choke them out (full choke) or block the air intake with a rag and starve the motor for air. Chances are the carburetor slide is sticking in a wide open position. Take the carburetor apart clean and inspect it. Also inspect the intake manifold for cracks and air leaks. For normal running add a kill switch so you can stop the motor without having to unplug or ground the spark plug. If the motorcycle is completely stripped except for a power wire to the coil, add the kill switch between the generator (wire coming out of the motor) and the coil.

May 09, 2011 | 1971 Suzuki T 350

1 Answer

Boat motor won't turn off !


im not sure on your motor but if you have a choke tube with a cylinder in it the cylinder could have came out take the top off and hit your choke and see what moves

May 16, 2009 | Boating

1 Answer

Ignition


i just had that same prob with mine. My Solution: NEW steering collum / key switch
what was happening was the key would get stuck in the igniton and i had to give it a little tap to get it to relese from the igniton. well, by giving it those taps, it popped a little plastic lever in the collum for the igniton switch. then the car would turn on with the key, but not turn off, i had to do the same thing that you had to do to to turn it off/on.

A steering collum later, and it was fixed

Jul 16, 2008 | 1996 Mercury Cougar XR7

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