Is there a way to tell if you have a bad coil pack without a spark tester. I have not invested in a timing light or spark tester yet. My engine is a starlight 85 hp evinrude mid 70s model. It ran fine all summer. The last time I took the boat out it would start up but stall everytime it was shifted into gear. I have rebuilt the carbs thinking this was the problem but i am still having the same problem. The engine will run with the muffs on and stay running in gear. If the lower unit is submerged however it will stall every time shift into gear. I have also done a compression and leak down test and everthing checks out fine. I believe the problem is ignition related since this issue started "all of the sudden". I would apreciate any advice you all can offer.