New Full Overhaul Gasket Kit Fit for Yanmar Marine Boat Engine 3GM30 3GM30F. 1set OverHaul Gasket Kits (Including Head Gasket). Fit for Yanmar Marine Boat Engine 3GM30 3GM30F. International Buyers – Please Note. If you need to receive the goods. If you are not satisfied with the item, you can return it, except for any installed parts. Please send item back in original package (new and un-used, accessories included).