Yamaha Motor University Practice Exam

When assembling the lower unit, it is important to use oil, grease, and sealant in their designated areas to ensure a proper seal and lubrication during operation. Each of these substances serves a specific purpose in the assembly process.

Oil is typically applied to moving parts and internal components where lubrication is necessary to reduce friction and wear. Grease is used at certain points to provide thick lubrication, especially in areas that experience heavier loads or where water intrusion could occur. Sealant is crucial for preventing water ingress into the unit, ensuring that all joints and connections are watertight.

Using all three substances together helps maintain the performance and longevity of the lower unit. Proper lubrication and sealing prevent damage and ensure that the unit operates efficiently under various conditions. Overall, recognizing the importance of each substance and applying them appropriately contributes significantly to the reliability of the assembly.