After using trim at near wot boat starts to misfire, won’t go over 3500 rpm’s and won’t plane again. The battery is new and there is a separate battery for trolling motor. It ran great first thing in the morning but began cutting out when I would trim. Later in the day it wouldn’t get up on plane at all. Volts drop from 13 to 11. Serial number is 1B288873. We are thinking alternator but appreciate any thoughts. All connectors are bright and shiny as well as securely connected.