I have a 2010 Mercury Pro XS 2 Stroke. Serial number 2B017938 and I’m running smart craft gauges and my battery is a 2 year old 31 series AGM ProGuide battery. Battery has been tested and is fine. I went out tonight and my initial 15 minute run no issues. On my way back, I kept throwing a high voltage alarm. I was monitoring as I was WOT and it would randomly shoot up to 17 Volts. I just replaced alternator less than a month ago. My first check tomorrow will be the fusible link. How to I tell if it’s blown? What else should I look at? Thanks.