ARCO Marine Replacement Outboard Starter Brush Kit

The ARCO Marine Replacement Outboard Starter Brush Kit (BK900) is an essential maintenance component for anglers and boaters who rely on American-made permanent magnet outboard starters. After years of hard use—whether you're running coastal charters, freshwater tournament circuits, or weekend fishing trips—starter brushes wear down and lose their ability to deliver reliable cranking power. This replacement brush kit restores that critical starting performance without requiring a complete starter replacement, making it a cost-effective solution for keeping your boat operational when you need it most.

Starter brushes are carbon contacts that slide against the commutator inside your starter motor, transferring electrical current to the rotating armature. As these brushes wear—typically over 300–500 hours of engine use—they become thinner and lose contact pressure, resulting in weak cranking, slow starts, or complete starter failure. The ARCO BK900 kit includes new brushes machined to OEM specifications and sized to fit Mercury and OMC permanent magnet starters. The compact 3 x 1 x 3-inch kit is lightweight at 0.25 pounds, making it simple to carry aboard or keep in your maintenance locker for emergency repairs on the water.

This brush kit is compatible with Mercury starters (63292, 75384, 75384-1, 898265016) and OMC starters (385952, 433850), covering a wide range of outboard models from 1980s through early 2000s rigs still in service today. Professional boat mechanics and experienced DIYers can complete the replacement in under an hour using basic tools. For boaters operating vintage or legacy outboards in remote areas where downtime isn't an option, keeping a spare brush kit aboard provides insurance against unexpected starter failure and ensures you can return to the dock under your own power.