Sierra 18-2644 Mercruiser Alpha I Gen II Drive Shaft Housing Seal Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Alpha I Gen II Kit Contains 1 18-2003 Oil Seal 2 18-2056 Oil Seal 1 18-2715 Check Valve Kit 1 18-2944 Seal Ring Gasket 1 18-2945 Drain Screw Gasket 1 18-3289 Double Lip Seal 2 18-7103 O-Ring 1 18-7117 O-Ring 1 18-7161 O-Ring 1 18-7169 O-Ring 1 18-7188 O-Ring 2 18-7420 O-Ring Application Mercruiser Stern Drive Alpha One Gen II 1991-1995 0D469859 thru