50515-ZV5-000 Tilt Lever Spring - Overview. The 50515-ZV5-000 Tilt Lever Spring is an essential component in Honda marine engine systems, specifically in the tilt and trim mechanism. This spring provides the necessary tension to the tilt lever, enabling smooth and secure adjustment of the engine's tilt angle for optimized operation and handling on the water. It plays a vital role in maintaining the precise mechanical motion needed to engage and disengage the tilt lever efficiently and reliably..