Sorry, I should have added this. The spark seems pretty strong for each cylinder at idle on a water hose. I put a spark tester with a 3/8" gap on each one and it's a strong, blue spark at idle. I guess that doesn't mean much. A lot can change under load and at higher rpm/more throttle.
I have a new to me 98' Mercury 150 XR6. I bought it knowing it had good compression (125-130), but was not running right. This came on a 98' Nitro Savage 884. When I went to check out the boat/motor I could tell right away that the carbs were flooding the engine. Took it out on the lake and it...