Indmar 685018 Johnson Pump Bearing Restore smooth, reliable operation to your engine’s accessory drive system with the Indmar 685018 Bearing. Designed as a genuine OEM replacement, this marine-grade bearing is built to handle the constant load, heat, and vibration found in high-performance inboard engines. The 685018 bearing is commonly used in Indmar accessory drive assemblies and pulley systems, where it helps support rotating components and maintain proper belt alignment. A worn bearing can cause squealing, vibration, pulley wobble, or premature belt wear, eventually leading to charging or cooling system problems if left unaddressed. Built to Indmar factory specifications, this bearing delivers the proper fit and dependable performance needed for long-term durability in harsh marine environments. Whether you’re replacing a noisy pulley bearing or rebuilding an accessory drive assembly, the 685018 provides OEM-quality reliability and smooth operation. What This Bearing Is Used For The Indmar 685018 bearing is typically used in: Accessory drive pulley assemblies Idler pulley systems Alternator bracket and belt tension systems Raw water pump pulley applications on select Indmar engines It plays a critical role in keeping the serpentine or V-belt system aligned and operating smoothly, helping reduce belt wear and maintain proper accessory performance. Common Engine Applications The 685018 bearing is commonly found on Indmar GM-based marine engines, including: Indmar Assault 5.7L Indmar Monsoon 325 and Monsoon 340 Indmar 5.0L MPI Indmar 5.7L MPI Select Indmar 6.0L and 6.2L engine configurations These engines are widely used in popular towboats and wake boats such as: Supra Launch series Supra Sunsport Moomba Mobius LSV Moomba Outback and Mojo Malibu Wakesetter (Indmar-powered models) MasterCraft ProStar and X-Series boats with Indmar engines Fitment can vary depending on pulley configuration and engine setup, so confirming compatibility with part number 685018 before ordering is recommended.
