Have a 2009 Pro XS 175. Has performed great. Last weekend the boat suddenly feels like it has water in it due to drop in performance. Hole shot dropped etc. Buddy's 200 dropped two coils last week. I used plug wire tester on mine. Found bad coil I guess. Can you tell me what PN I'm going to need. A search on the web about made my eyes bleed. Serial number is 1B7764xx. Is there anywhere that has them at a good price in stock? Thanks in advance.