I have trouble with my 1989 50 h.p. 3 cyl.merc, weak firing on two cylinders.<br />All testing with ohm meter and various troubleshooting has led me to the switchbox as being bad. I do not believe there is a good way to test these at home but I am unsure. <br />I have changed this switchbox in the recent past ( 3 seasons in Maine with little use ).<br />My questions would be:<br />1.) Is it common that these only last several years of little use.<br />Is weak firing a symptom of a bad switchbox?<br />2.) Could the stator or any other faulty part cause it to fail prematurely, even though the stator ohms out within specs? <br />3.) Is there an easy way to test the switchbox with a meter or an oscilliscope?<br />4.) The last switchbox I purchased was a Quicksilver model. I have noticed other switchboxes ( aftermarket) for less money on the net. Would it be wise to do the aftermarket or stick with merc? <br />Any expert advice would be greatly appreciated. Thanks!
