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Wiseco Piston Kit Standard Bore Size (2.875") This is a very high quality forged piston. This kit comes with the piston, Wiseco rings, wrist pin and pin clips. These pistons are available in STD, .020", .030" and .040" oversize Fits: Mercury / Mariner 3 Cyl Cross Flow 50hp 1984-1990 3 Cyl Cross Flow 60hp 1974-1990 3 Cyl Cross Flow 65hp 1973-1976 3 Cyl Cross Flow 70hp 1977-1983 6 Cyl Cross Flow 115hp 1984-1988 6 Cyl Cross Flow 140hp 1978-1981 6 Cyl Cross Flow 150hp 1973-1978 To order, select your desired options, then enter the quantity and click "add to cart". Most standard and oversize pistons are in stock however some sizes may be on a short backorder from time to time. Please don't hesitate to contact us for assistance. Replaces: 6605A3, 6637A3, 7437A3, 8199A3, 8200A4, 8600A3, 9137A9
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🇺🇸 Ship from USA · On Agora since 2026
$144.09