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Mercury Outboard No Spark On One Cylinder. I then removed the flywheel and visually inspected the stator assumed it was good and ordered a new power-pack which came today. 1986 99 coil pack. If Im not mistaken your little Merc has a single carburetor and since one cylinder runs the other should as well - that eliminates fuel supply. Engine fails to run and has no spark possibly on only one cylinder.
114 7452k 1 Switch Box 2 Cylinder Cdi Electronics Youtube From youtube.com
Engine fails to run and has no spark possibly on only one cylinder. Posted 10-22-2013 1018 AM ET US My 1988 Mercury 115-HP in-line six-cylinder outboard engine also known as a Tower of Power has spark on cylinders 1 4 and 6 but no spark on cylinders 2 3 and 5. If ok the ignition switch shift switch or harness has a problem. If the engines ignition sparks the stop circuit has a fault. Whats this extra coil part do. Try disconnecting the blackyellow wire from the engine to check the kill circuit first.
As a verification swap the Trigger and spark plug Wire to the cylinder closest to the dead cylinder ie if 1 is dead swap the brown Trigger Wire with the white one.
If the dead cylinder starts firing replace the pack that was firing all three cylinders. One should go to the CDI while the other goes to the ground. This will change the engine starting cylinder. If the reading is now within spec the pack is bad. MercuryForce Two Cylinder Engines 1994-2006 Engines Using CDM Modules NO SPARK ON ANY CYLINDER. If the engines ignition sparks the stop circuit has a fault.
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If the problem persists in the new cylinder the. For instance if you have no spark on one cylinder and the triggers DVA reading for that cylinder is low disconnect the trigger wires and recheck the DVA output. Old triggers fail from internal failures from temperature. Connect a spark gap tester to the high-tension leads coming from the distributor cap and set the gap to approximately 716. Check for stuck reed valve.
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No fire on one cylinder. For instance if you have no spark on one cylinder and the triggers DVA reading for that cylinder is low disconnect the trigger wires and recheck the DVA output. If this does not fix your issue then Id suggest disconnecting the yellow wires to the rectifier from the stator. As a verification swap the Trigger and spark plug Wire to the cylinder closest to the dead cylinder ie if 1 is dead swap the brown Trigger. I didnt have spark on one and two but did on three and four.
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One should go to the CDI while the other goes to the ground. Engine is low on power or has a miss. Since this condition can be caused by the opposite switch Box pack disconnect the whiteblack jumper between the packs and retest. I didnt have spark on one and two but did on three and four. I would check the firing order first to make sure everything is right that thing should run like new.
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No fire on one cylinder. Disconnect the trigger wires and connect a jumper wire from the whiteblack trigger terminal to the black trigger terminal on the switch box. If there is no spark noticed at the plug remove it and replace it with a new one. A faulty or failing trigger can cause one or more symptoms. Engine fails to run and has no spark possibly on only one cylinder.
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And make sure that hollow sound is not from no water in there to be on the safe side. I then had good spark on number four telling me the coil was good and the coil which was firing perfectly on number four was not in the number one position. And make sure that hollow sound is not from no water in there to be on the safe side. If the engine still does not start change the whitegreen and the greenwhite stator wire. I would check the firing order first to make sure everything is right that thing should run like new.
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I then had good spark on number four telling me the coil was good and the coil which was firing perfectly on number four was not in the number one position. If ok the ignition switch shift switch or harness has a problem. Connect a spark gap tester to the high-tension leads coming from the distributor cap and set the gap to approximately 716. If the dead cylinder starts firing replace the pack that was firing all three cylinders. Try disconnecting the blackyellow wire from the engine to check the kill circuit first.
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Disconnect the BlackYellow stop wires from the harness and retest. Im sorry for the confusion. If playback doesnt begin shortly try restarting your device. If there is no spark noticed at the plug remove it and replace it with a new one. Since this condition can be caused by the opposite switch Box pack disconnect the whiteblack jumper between the packs and retest.
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On this particular model it is less likely to be the stator simply because of the way the ignition works on the portable 2 stroke Mercs - if the stator was bad you have NO spark at all unlike other Mercs where a single cylinder or pair will drop out with a bad stator. Usually when one cylinder goes out one assumes that CDI fuel is at fault. I swapped all coils around and they are all good. Disconnect the stop switch circuit and retest the spark output. Hi Paul Thank-you for your patience on this one.
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If you still dont get a spark you want to check for a faulty stop switch. If you remove the bias jumperand both work thats your problem. I then removed the flywheel and visually inspected the stator assumed it was good and ordered a new power-pack which came today. If the dead cylinder starts firing replace the pack that was firing all three cylinders. Start by disconnecting the stop wire BlackYellow wire on the powerpack and re-test.
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Start by disconnecting the stop wire BlackYellow wire on the powerpack and re-test. Old triggers fail from internal failures from temperature. If the engine now has spark replace the rectifier. Disconnect the Yellow wires from the stator to the rectifier and retest. The ones you remove.
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On a smaller pull-start outboard motor you find the stop button and follow the two stop switch wires back to the origin. If the engines ignition sparks the stop circuit has a fault. For instance if you have no fire on one cylinder and the DVA trigger reading for that cylinder is low disconnect the trigger wire and recheck the DVA out put to ground from the trigger wire. If ok the ignition switch shift switch or harness has a problem. One should go to the CDI while the other goes to the ground.
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If you remove the bias jumperand both work thats your problem. Engine is hard to start especially after sitting from a run. If the problem persists in the new cylinder the. Whats this extra coil part do. No Spark would most likely be stator ignition switch or pack.
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On this particular model it is less likely to be the stator simply because of the way the ignition works on the portable 2 stroke Mercs - if the stator was bad you have NO spark at all unlike other Mercs where a single cylinder or pair will drop out with a bad stator. If there is no spark noticed at the plug remove it and replace it with a new one. Old triggers fail from internal failures from temperature. Check the plugs first for some difference between them. 1986 99 coil pack.
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Whats this extra coil part do. If this does not fix your issue then Id suggest disconnecting the yellow wires to the rectifier from the stator. It appears that one lead to a coil does not send any power. Mercury One and Two Cylinder Engines 1966-1985 With 174-3996336-3996336-3962 StatorSwitch Box. On this particular model it is less likely to be the stator simply because of the way the ignition works on the portable 2 stroke Mercs - if the stator was bad you have NO spark at all unlike other Mercs where a single cylinder or pair will drop out with a bad stator.
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Usually when one cylinder goes out one assumes that CDI fuel is at fault. I would check the firing order first to make sure everything is right that thing should run like new. Hi Paul Thank-you for your patience on this one. Check the key switch harness and shift switch. They can sometimes wreck each other through the bias circuit.
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Since this condition can be caused by the opposite switch Box pack disconnect the whiteblack jumper between the packs and retest. After installing it though I still had no. Disconnect the Yellow wires from the stator to the rectifier and retest. The plugs HT leads and coils are OK but there is no spark at one of the plugs. Old triggers fail from internal failures from temperature.
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Cant get coil off stator 1968 Merc 200 20hp. Since this condition can be caused by the opposite switch Box pack disconnect the whiteblack jumper between the packs and retest. Old triggers fail from internal failures from temperature. If you still dont get a spark you want to check for a faulty stop switch. And make sure that hollow sound is not from no water in there to be on the safe side.
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Mercury 150hp V6- No spark on one side Like laddies said a lot of the time the bad switch box murkurese for power pack is the one that fires killing the other one through the bias circuit. 1986 99 coil pack. Connect a spark gap tester to the high-tension leads coming from the distributor cap and set the gap to approximately 716. The plugs HT leads and coils are OK but there is no spark at one of the plugs. Since this condition can be caused by the opposite switch Box pack disconnect the whiteblack jumper between the packs and retest.
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