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Long Bolt (4 1/4"): 10-813642 10-805343 2 (2)
The cover had been removed from this and the diaphragm has been inspected thoroughly
Block casting # 361959 73-90 Big Block 4-Bolt Mains
This was used on 1989
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MerCruiser 4cyl 470 3.7L 190 190hp Rocker Valve Cover 41638A1 41637 1983-89 75hp Long Bolt (4 1/4"): 10-813642Item Details Removed from a 1985 1986 MerCruiser 470 (190hp) S N A681323 Overall Good Condition, original paint Parts Included MerCruiser Cylinder Head Valve Rocker Cover 41638A1 (Stamped 41637) This particular one was only used on 2bbl models as well as the 4bbl models with the 98348 C1 intake manifolds as these had the provision on the top for a stud for the 4BBL carburetors The 488 models had a different valve cover, but could be replaced by this
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