This WISECO RING SET is for the 2-Stroke Marine Wiseco piston.  New item, old stock. Part# 3125KD

This ring part number is used in Wiseco piston kits :

Mercury V6 135 HP 1986-91, 150 HP 1979-90  Wiseco Part No. 3108PS, SS

Mercury V6 135 HP 1992-00, 150 HP 1992-00  Wiseco Part No. 3140PS, SS

And for many custom built pistons by Wiseco for different big bore or performance applications.

This is a new Half-Keystone Ring Set, for the 3.125" piston kit.  Check your piston and bore size before ordering.

A qualified machine shop is required to measure and/or bore your your cylinder to fit the piston kit to your cylinder.

You are purchasing quantity 1 each part no. 3125KD ring set for one piston kit for the Wiseco piston.

 Picture is for reference, and is exact model listed.