Seller notes

General Information for Selecting and Purchasing an SEI 116 Upper Gearcases SEI 116 upper gearcases replace Mercuiser Alpha I, GEN II uppers produced from 1991 to current. Serial numbers covered are OD469858 and above. You must insure that the correct upper SEI gearcase is selected to maintain the correct gear ratio. See the chart below, although it is best to verify by the tooth counts as there are some variations. You can also contact us with your serial number to verify. SEI Part Number Gear ...

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