MerCruiser 10-98619A1 U-Bolt Heat Exchanger Bracket Holder 4" 470 4cyl 1983-89 Piston Sets 1967-1982) were also commonly used

1967-1982) were also commonly used during this time period as well and are interchangeable when swapping as a pair

Part #'s Upper Shift Shaft Assembly: 57244A 4

but this one was probably only used in the 1987-1990 period

In 1976 ONLY the 120hp / 140hp / 165hp GM inline models w/ "M" Suffix

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MerCruiser 10-98619A1 U-Bolt Heat Exchanger Bracket Holder 4" 470 4cyl 1983-89 Piston Sets 1967-1982) were also commonly usedItem Details You get the PAIR as pictured Overall Good Condition Parts Included 10 98619A1 U Bolt bracket To Heat Exchanger (x2) 98620 Strap (x2) 11 26484 Nut (x4) Compatibility For the most part it seems these parts were used from 1983 1989 on "470" models that used a 4" Heat exchanger ****(not the smaller 3" model)**** 1983 1984 1985 1986 1987 1988 1989 Alpha One 470 4 cyl 165hp 170hp 180hp 190hp 3. 7L 3. 7LX 224CID 488 485 Sterndrive