90105-ZVA-000 Oil Check Bolt - Overview. The 90105-ZVA-000 Oil Check Bolt is a vital component in Honda marine engine systems. It allows for easy visual inspection of the engine oil level, helping to maintain proper lubrication and prevent engine damage. Designed specifically for Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This oil check bolt provides a reliable means to visually verify engine oil