Took my nephew fishing last week and the motor quit like it was starved for fuel and the buzzer sounded.
Pulled the cowl to find the serpentine belt had shredded. We fished our way back to the dock and loaded with the troll motor.
Long story short-- the stud which holds the idler assembly had backed out of the block to the point it let the belt get under it and ruined the belt while chewing the bottom off the pulley.. I don't think this happened very fast so I'm sure it was eating away the last time I was out. I'm hoping there is not more problems to come from debris being sucked into the intake. I spent half a day pulling the lower cowl and meticulously cleaning everything. I posted this on the Merc forum and one guy allowed he's seen it twice before
To add insult to injury I hit a deer that morning before daylight--she did put some wrinkles in the drivers side of my truck. My poor nephew who has been jumping up and down for me to take him fishing... Said: I bet you never take me again !!!!