I have a 1977 Evinrude 140 hp outboard motor.<br />There is very little or sometimes no spark on the two cylinders that are on the right hand side if your facing the motor.<br />The other two cylinders appear to be getting good spark.<br />The motor has been running good but will start cutting out after awhile. The last time I took it out it started right up at the launch and ran fine for the first thirty minutes or so. After fishing for awhile I went to start it up and it took probably 5-10 minutes to start and it ran like crap and smoked pretty good.<br />Since two cylinders aren't getting much spark I was wondering what needs replacing?<br />Thanks!!!!!!
