1998 Searay 5.0 Merc Ign Problem
 

Trying to help a friend, actually is boat next to my slip.
Have not worked on it yet, but know it has no spark.
Do I need to do diagnostics, or could it just be a bad cap etc... I have been there before and I know the caps rot out with their aluminum terminals. The biggest reason for this post is that I will not be around to do the job because I have to go to work for a 24 hour shift in the FDNY and the boat has dead batteries, and I have been all over the place and have been everyone's favorite bilge rat ! Thanks for any assistance, BBB
It might be newer than 1998

It could be the cap, rotor, coil or coil wire. But one of the most common causes for no spark on a T-bolt system is the ignition sensor.

In any case, I never change anything until I find the problem. Yes, sometimes it actually takes longer than just swapping a few parts (if you get lucky and replace the faulty part), but to me troubleshooting is fun, part swapping is not.

Dave