These rings will fit all Mercury 2 Cyl. 20 HP 1972-79 . WSM Rings are top quality RIK Japanese high performance rings. Will fit OEM factory pistons.
Wiseco rings will fit Wiseco forged piston only.
Ring set includes:
1 Top ring
1 Bottom ring
O.E. No. 39-18653A12
This ring set will fit the following applications only,
Mercury 2 Cyl. 20 HP 1972-79
