I keep mine pretty simple, it has covered everything I have needed. I dont need a full mechanics tool set on the water, I am not going to rebuild my motor standing knee deep in the lake. I keep more tools and parts in the truck.
-Pliers (have channel lock, needle nose and side cutters on board)
-fuses
-zipties
-electrical tape
-assortment of electrical connectors
-emery cloth
-jumper cables
-spare trolling motor prop
-screw drivers
-first aid kit
-nav light bulbs
-tow rope
-flash light
In the truck:
- bottle jack
- 4 way lug wrench
- air pump
- 12V work light
- mechanics tool kit
- hammer
- pry bar
- a few blocks of 2X4
- trailer lock
- spare prop (with nut, spacer and cotter pins, also keep a Flo-torq hub kit incase I have to borrow a prop)
- Minnkota steering cable set