Piston Kit, Cast - Mercury, Mariner 115-175hp Optimax

Cast Piston Kit Standard Bore Size (3.500") This is a very high quality cast aluminum alloy piston. This kit comes with the piston, Riken rings, wrist pin and pin clips. This piston has the large wrist pin (0.920" O.D.) Check yours or compare OEM numbers for your serial to those listed below! (We are also here to assist. Give us a call.) These pistons are available in Port and Starboard in sizes STD, .015", .020", .030" and .040" oversize 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. Fits: Mercury / Mariner 115hp Optimax 2.5L (s/n 0T178499-Up) 135-150hp Optimax 2.5L (s/n 0T178499-Up) 175hp 2005-up Optimax (s/n 0T178500-Up) Replaces: 700-859563T4, 700-859563T17, 859563T4, 859563T17, 859562T17, 859563A5, 859562A5