Yamaha F250B Owner's Manual page 107

Single engine
3
1. Isolator lead with circuit protection
2. Red cable
3. Black cable
4. Fuse
5. Battery for accessories
6. Battery for starting
7. Negative connecting cable
2 1
4
6 5
7
ZMU05939
Twin engines
4 3
6
7
1. Starboard side engine
2. Port side engine
3. Red cable
4. Black cable
5. Isolator leads with circuit protection
6. Fuse
7. Battery for starting
8. Battery for accessories
9. Negative connecting cable
Maintenance
1 2
5
4
8
9
ZMU05941
3
7
101