Repairing old mounting holes

[Bad Habit]

I'm going to be installing a new transducer this year. Looking for advice on the best way to repair and seal the holes in the fiberglass from the old one. Want to make sure I do it correctly and don't get water seeping into them.

Rick

[TileMan Dan]

3m. 5200.

[Don Supon]

Fill holes using old screws into 5200. Suggest you purchase a mounting block for all future transducer applications, That way you don't drill into transom.