Sierra 18-3999 Piston Rings

Sierra 18-3912 Piston Rings This item has been discontinued by the manufacturer and is no longer available. Sierra replacement piston rings for Johnson/Evinrude Outboards. Bore Size: 3.030 .030...

Piston Rings - Special Order est. 10 Days

Sierra 18-3978 Mercury Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: Mercury Marine 39-15322M

Sierra 18-4089 Piston Rings Sierra high-quality engine parts are designed to meet or exceed OEM parts. Interchangeable with: Mallory 9-54425