Mercury Kiekhaefer Outboard Mark30 Powerhead Crankcase Cylinder Block 821-1012A3 Pulley 135 HP--1987 & Newer

135 HP--1987 & Newer

Used with pretty much all Mercruiser Inline engines (2

1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 90hp 115hp 140hp 85hp 75hp 150hp

Found on a variety of Johnson & Evinrude V6 Outboards 150hp-235hp 1984-1992

(which are readily available online)

Mercury Kiekhaefer Outboard Mark30 Powerhead Crankcase Cylinder Block 821-1012A3 Pulley 135 HP--1987 & NewerThis is Off a 1956 Mercury Mark 30 1 Turbo Four (serial # 994104) Will work with 19 Item Condition: Good Overall Condition Selling for Parts: Compression Test: #1 127psi, #2 129psi, #3 110psi, #4 122psi Will need to be gone threw. Doesn't appear to be any damage. Spins freely may just need some rings. May not need anything low compression on 3 is from sitting a long time. Part#'s Crankcase: 821 1012A3, 17 20323, 17 20032, 23 6348 (compatable with 821