Convenient Transom Seal Kit includes everything needed to remove & reinstall a Mercruiser Alpha 1 Gen II stern drive from the transom. Mercruiser Alpha One Gen II Transom Seal Kit | Sierra 18-8218 Sierra Alpha One Gen II transom service kit For Mercruiser Alpha One Generation II stern drives from serial number 0D468859 and up (1991 and up) Contains exhaust bellows, u-joint bellows with retainer, shift cable bellows, water hose, clamps, sealed gimbal bearing, and gasket mounting kit Includes sealed gimbal bearing Will retrofit older Gen II drives with greasable gimbal bearing to the new sealed gimbal bearing Replaces Mercury 30-803099T1