74639Q02 816431A1 18654A1 Bellows Kit for MerCruiser Alpha One Gen II Replaces 74639A2 74369 31659 32734 32734A3 Material: rubber and stainless steel Product Type: Bellows Kit Design and Style: Engineered for and flexibility Usage and Purpose: Replacement parts for MerCruiser Alpha One Gen II engines Performance and Property: Resistant to temperatures (105℃), with low emission levels (≤XRmarine) Compatibility: Specifically designed for MerCruiser engines Dimensions: As shown in the figure, a precise fit for your MerCruiser Alpha One Gen II outboard engine Fitment: MerCruiser R/MR/ALPHA ONE Gen II models from 1977-1990 This bellows kit serves as a direct replacement for components, proper fit and function.The U-Joint Bellows (816431A1) and Exhaust Bellows (18654A1) are built to endure marine conditions.The Shift Bellows (74639Q02) and Sealing Kit (27-94996Q2) provide effective sealing to prevent water intrusion and protect the engine's internal systems.Each part is constructed to meet the operational requirements of marine environments.The materials used maintain integrity under extreme temperatures up to 105℃ without performance loss.Low emission characteristics contribute to a cleaner boating experience.The kit performs reliably whether operating in calm or challenging water conditions.Installation is simplified with all necessary components included: Shift Bellows, U-Joint Bellows, Exhaust Bellows, and Sealing Kit.Using this kit supports consistent engine efficiency and , contributing to extended engine service life.It is a practical choice for maintaining the performance of MerCruiser Alpha One Gen II outboard engines.