86840A05 U-Joint Bellows for Mercruiser 86840A3 86840A05 8M0062406 Sierra 18-2756 9-72702 89140 Boat Engine Parts Material: rubber Color: black Compatibility: fits Mercruiser Bravo I/II/III, Blackhawk, and other compatible models Temperature resistance: withstands temperatures up to 105℃ Vapor emission: meets applicable vapor emission standards Design: U-joint bellows with flexible construction for movement and sealing This U-joint bellows is designed for use in marine environments and constructed to endure operating conditions.Made from rubber, it provides flexibility and resilience during engine.The bellows supports smooth driveline performance by protecting the u-joint from water, and corrosion.Its design allows for efficient installation on specified boat engine models, including various Mercruiser and compatible aftermarket part numbers.The black finish helps resist degradation while blending with standard engine components.Suitable for use in a range of marine applications, this bellows contributes to consistent engine performance and drivetrain protection under varying temperature and environmental conditions.