1988 Merc 200 hp intermitten problem

[Mercury140-I6]

Hey guys:<br /><br />I have a friend that has a 1988 Mercury 200hp outboard and I need to know how to test the electronics to see what (If Anything) is bad. He said that it intermittenly acts like it is dropping cylinders and then picking them up again. How do I test the Trigger(s), Switch Boxes, Coils, Stator, and whatever else I am missing in this list. Your help is greatly appreciated.<br /><br />Craig

 

[KCLOST]

Re: 1988 Merc 200 hp intermitten problem

For the stator here are the Ohm readings you should see....<br /><br />My seloc manual states...<br />Between blue and red stator wires = 4.5-6.2 x1000<br />Blue/White and Red/White = 5.4-6.2 x1000<br />Red to Ground = 125-175 x1<br />Red/White to Ground = 125-175 x1<br /><br />These leads come from the stator and connect to the top of the switch boxes... Disconnect them from the boxes before testing...<br /><br />The trigger leads also connect to the switch boxes, and can be ohmed also, but I forgot those numbers, I'll check them tonight and post...