The GASKET- OUTDRIVE Mounting. GASKET (118-2743) is made of durable construction that is hard-wearing and non-corrosive to withstand the harsh marine environment. It is ideally fit for R, MR, Alpha One & Gen II drives (s/n 6225577 & Up) (1983 & Up). The GASKET- OUTDRIVE Mounting. GASKET (118-2743) contains one (1) 18-2820 Drive Shaft Housing to Bell Housing Gasket - replaces O.E. # 27-64818, one (1) 18-2840 Bell Housing Gasket - replaces O.E. # 27-35982, two (2) 18-7153 O-Ring - replaces O.E. # 25-25439, one (1) 18-7170 O-Ring - replaces O.E. This gasket is replaceable with 47-2743, 27-94996, 27-94996-2, 30999775771, 3099977577, and 9-61012. Key Features: It is made of durable construction that is hard-wearing and non-corrosive to withstand the harsh marine environment. It is ideally fit for R, MR, Alpha One & Gen II drives (s/n 6225577 & Up) (1983 & Up). It contains one (1) 18-2820 Drive Shaft Housing to Bell Housing Gasket - replaces O.E. # 27-64818, one (1) 18-2840 Bell Housing Gasket - replaces O.E. # 27-35982, two (2) 18-7153 O-Ring - replaces O.E. # 25-25439, one (1) 18-7170 O-Ring - replaces O.E. It is replaceable with 47-2743, 27-94996, 27-94996-2, 30999775771, 3099977577, and 9-61012. Specifications: Brand: Sea Star Solutions SKU: 18-2743 UPC: 030999775771 Weight: 0.12 LBS Unit Of Measure: EA Manufacturer Part Number (MPN): 118-2743 Fits: R, MR, Alpha One & Gen II drives (s/n 6225577 & Up) (1983 & Up)