OMC OEM GASKET,CENTER VENTURI CLUSTER SCREW. ALSO AVAILABLE IN OVERHAUL KIT - PART NUMBER 381400 FOR155 HP,PART NUMBER 383615 FOR 80 HP.FOR HIGH ALTITUDEOPERATION USE HIGH ALTITUDE KIT - PART NUMBER 382131 FOR155 HP MODEL, AND USE HIGH ALTITUDE KIT - PART NUMBE - 0312433 | boats.net