First time posting so I appreciate any response. I am new to Volvo Penta and I/O boats but I just bought a 4.3 GL with the sx stern. Cleaned it up last weekend and while I was in there hooked up the battery to listen to tunes and when I turned the key to the on position an alarm came on it was coming from what looks like a fuse box attached to the port side exhaust manifold anyone know what that is? Also forgot to get the plugs from winterization from previous owner so what size do I need or where can I purchase new ones both block and exhaust manifold. Thanks for the help.