


Piston Kit: Mercury 20-50 Hp Cross Flow Hp .040 Over Size Only - 100-05-07K
Marsoni
M251S
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Friday, May 29
Piston Kit: Mercury 20-50 Hp Cross Flow Hp .040 Over Size Only - 100-05-07KITEM#: 100 05 07K PISTON KIT MERCURY MARINER 20 50 HP CROSS FLOW 72 97 . 040 OVER OEM#: 743 3366A2, 780 9119A10 2. 605" BRAND: WSM FITMENTS: Make Model Year(s) Mariner ALL Mercury 2 Cyl 2. 565 Bore Cross Flow 20 1972 1979 Mercury 4 Cyl 2. 565 Bore Cross Flow 40 1989 1997 Mercury 4 Cyl 2. 565 Bore Cross Flow 50 1970 1985 For more information on our policies please click the Shipping and Payments tab or to ask a question click our store name for our
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Reviewed in the United States on February 19, 2026
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