Click here to shop for this part on Amazon.com Click here to shop for this part on ebay.com 18-2688 Marine Lower Unit Seal Kit Seal Kit Contents: Part # Desc. O.E.# Qty. 18-2027 Oil Seal 321459 2 18-2855 Shift Housing Cover to Gearcase Gasket 314082 1 18-4248 Washer 311598 2 18-7100 O-Ring 301877 1 18-7109 O-Ring 317178 4 18-7127 O-Ring 313446 1 18-7128 O-Ring 313754 1 18-2001 Oil Seal 330137 2 18-7129 O-Ring 314491 1 GLM Part Number: 87622; Sierra Part Number: 18-2688 WorksWith Evinrude 50 HP 1971 Model 50172 50173 Johnson 50 HP 1971 Model 50ES71, 50ESL71 Evinrude 50 HP 1972 Model 50202 50203 50272 50273 Johnson 50 HP 1972 Model 50ES72, 50ESL72, 50R72, 50RL72 Evinrude 50 HP 1973 Model 50302 50303 50372 50373 Johnson 50 HP 1973 Model 50ES73, 50ESL73, 50R73, 50RL73 Evinrude 50 HP 1974 Model 50442 50443 50472 50473 Johnson 50 HP 1974 Model 50ES74, 50ESL74