Tohatsu Thermostat & Gasket Four Stroke 4HP, 5HP & 6HP. Part numbers: 3H6-01030 & 346-01032. Thermostat and housing gasket.  To fit the following four stroke models:   MFS 4 C & D. MFS 5 C & D. MFS 6 C & D. This is a genuine Tohatsu part, not a pattern / aftermarket item.  If you are in any doubt as to whether this will fit your outboard, please contact us before purchasing. Thank you for looking. (O)