When setting up your Honda outboard motor, choosing the right battery is essential for safe and reliable operation. Whether your model features an electric starter or a manual start, Honda specifies clear requirements to ensure optimal performance and longevity.
Battery Specifications
All Honda BF8D, BF9.9D, BF15D, and BF20D outboard motors operate on a 12-volt system. For electric-start models, Honda recommends a 12-volt battery with at least 35 Ah capacity and 270 CCA (Cold Cranking Amps). This ensures sufficient power to crank the engine and support onboard accessories.
Types of Batteries
Electric-Start Models:
- These outboards include battery cables — a red-banded positive (+) and a black-banded negative (–) lead. Use a high-quality starting or cranking battery, not a deep-cycle type, as deep-cycle batteries are not designed to handle engine starting loads.
Manual-Start Models:
- Even without an electric starter, these motors feature a 12-volt DC charging receptacle. You can connect it to a battery to power lights, electronics, or other accessories on your boat.
Installation and Safety Tips
Always use a corrosion-resistant battery box and mount it securely in a dry, ventilated area away from heat and direct sunlight.
The charging circuit includes a 20-amp fuse located within the engine compartment.
When working around batteries, wear eye and skin protection — the electrolyte inside contains sulfuric acid, which is highly corrosive.
Keep children and untrained individuals away from batteries.
Minimum Requirements
Voltage: 12 V
Capacity: 35 Ah
Cold Cranking Amps: 270 CCA