17108-ZY3-000 Inner Manifold Spacer - Overview. The 17108-ZY3-000 Inner Manifold Spacer is a critical component within Honda marine engine systems, specifically designed to support the intake manifold system of Honda outboard engines. This spacer serves as a gasket or barrier positioned between manifold sections to ensure a precise seal, promoting optimal airflow and engine efficiency. By maintaining proper intake sealing, it helps the engine operate reliably and prevents leaks that could cause