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43-853640A2 Gear Kit (MerCruiser Gen II Upper Unit Gearcase 1998 & Up [SN 0L000040 and above]) 821823 & 853640 (stamped numbers)
) (1984-1985 Silver Paint) 1978-1980 models were similar but didn't have the two switches
Manufacturer Part Number: 381187 / 0381187
Set of 4 As pictured
With Design 1 thermostat housing
Mercury MerCruiser 46-37433A1 46-60367 Aluminum Water Pump Body Housing 1963-69 Mercruiser Propeller 43-853640A2 Gear Kit (MerCruiser GenPart Number(s) Included MerCruiser 46 37433A1 (46 37433 Stamped) ALUMINUM Water Pump Body Impeller Housing Replaces 46 32437A1 & 46 32437A3 General Application Compatibility MerCruiser MC I (1963) MC IA IB IC 1964 MC IA IB IC (EZ Shift) 1965 1966 MC 120 140 160 1967 1969 (Aluminum Housing) Mercury Outboards 650 (65hp 4cyl) 1963 1969 700 (70hp 6cyl) 1961 1962 850 (85hp 6cyl) 1962 1964 900 (90hp 6cyl) 1965 1967 950 (95hp 6cyl) 1965 1967 1000 (100hp