ARCO Marine Inboard Starter w/12-3/4" Flywheel & Gear Reduction

The ARCO Marine Inboard Starter with 12-3/4" Flywheel & Gear Reduction (Part No. 30460) is a direct-replacement engine starter engineered for reliability across multiple inboard marine platforms. Built for clockwise rotation, this unit delivers consistent cold-start performance in demanding saltwater and freshwater environments where engine reliability is non-negotiable. The gear-reduction design provides mechanical advantage during cranking, reducing strain on battery systems and improving cold-weather start capability—a critical consideration in offshore and remote waterway operations.

The 12-3/4" flywheel configuration fits Mercruiser, Volvo Penta, OMC, Yamaha, and comparable inboard platforms, replacing all CW (clockwise) rotating 10MT starters using the long-and-short-bolt straight-across mounting pattern. Precision-machined construction with anodized casting delivers corrosion resistance in salt-air conditions, while the nickel-plated brush holder extends service life and reduces maintenance downtime. The unit includes mounting bolts and gasket for immediate installation. ARCO Marine recommends operating with a fully charged battery; weak charge conditions can damage the starter and solenoid assembly, a critical point for operators maintaining remote vessels or backup engines.

This starter serves commercial fishing operations, expedition support teams, patrol boats, and private vessel owners requiring proven, immediate-availability engine restart capability. Weighing 8.9 lbs with compact dimensions (7 x 5 x 10 inches), it integrates cleanly into confined engine compartments while delivering the torque necessary for large inboard diesel and gasoline motors. Anyone operating Mercruiser, Volvo Penta, OMC, or Yamaha inboards—whether for professional duty, recreational use, or standby power—benefits from the reliability and fitment assurance of a purpose-built OEM-specification replacement.