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OMC lower crankshaft bearing: 18 1996-97 20 1985-97 25 HP 1970-76 HP 1981-84 & Jet & 1978-80 & 1981-84 & 1985-97 & 1982-84 1977 & 1985-97 28 HP 1987-97 30 HP 84 1985-97 35 HP 1976-80 & & 330854 1981-84 & 1985-97 OMC Johnson/Evinrude: # 330854 SIE18-Sierra: # 1391