1,Applicable Model: The motor piston ring is for Mariner outboard 2‑Stroke 20 to 25HP outboard 15HP 20HP 25HP. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2,OE Number: The part number for reference is 39‑827491A1 Please confirm whether it is consistent with the OE you need to avoid wrong buying and other problems. 3,Durable Material: The outboard motor piston ring is made of durable and reliable cast iron material, high strength and wear resistant, having long service time. 4,Improved Engine Efficiency: The outboard piston ring STD helps to maintain optimum engine performance by providing a tight seal between the piston and cylinder, preventing oil leakage, reducing friction and heat generation. 5,Easy Installation: This marine piston ring is easy to install, and doesn't require any complicated tools, perfectly fitting for ensuring seamless performance. 2 x Motor Piston Ring Item Type: Motor Piston RingMaterial: Cast IronDiameter: Approx. 65mm or 2.6in STD SizeInstallation Type: Direct Replacement InstallationOE Number: 39-827491A12Fitment: For Mariner Mercruiser Outboard Motor 2-Stroke series 20hp to 25HPFor Outboard 25HP 25HP XS B290347 andamp Up Crankshaft, Pistons, and FlywheelFor Mariner Outboard 20HP 20HP 7020201YD 1991 Crankshaft, Pistons, and FlywheelFor Mariner Outboard 25HP 25HP 7025201YD 1991 Crankshaft, Pistons, and FlywheelFor Outboard 15HP 15HP XD 9927000 THRU 0P016999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP 0G760300 THRU 0T979999 Crankshaft, Pistons, and FlywheelFor Outboard 15HP 15HP XD 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Mariner Outboard 25HP 25HP 7025312YD 1991 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 9807909 THRU 0P016999 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Marathon 0G044027 THRU 0G760299 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Marathon 9807909 THRU 0P016999 Crankshaft, Pistons, and FlywheelFor Mariner Outboard 25HP 25HP 7025211YD 1991 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Sea Pro 0G044027 THRU 0G760299 Crankshaft, Pistons, and FlywheelFor Mariner Outboard 20HP 20HP 7020211YD 1991 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Sea Pro 0G760300 THRU 0T979999 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Sea Pro 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Sea Pro 9807909 THRU 0P016999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP 0P325500 andamp Up Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Marathon 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP Marathon 0G760300 THRU 0T979999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP 9807909 THRU 0P016999 Crankshaft, Pistons, and FlywheelFor Mariner Outboard 25HP 25HP 7025311YD 1991 Crankshaft, Pistons, and FlywheelFor Outboard 15HP 15HP Sea Pro 0G044365 THRU 0G437999 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP 0T980000 THRU 0T999999 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP 0P325500 andamp Up Crankshaft, Pistons, and FlywheelFor Outboard 15HP 15HP Marathon 0G044365 THRU 0G437999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 0G044027 THRU 0G760299 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 0T980000 THRU 0T999999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP 0G044027 THRU 0G760299 Crankshaft, Pistons, and FlywheelFor Outboard 25HP 25HP 1B000001 andamp Up Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 0G760300 THRU 0T979999 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Outboard 15HP 15HP Marathon XD 0P017000 THRU 0P325499 Crankshaft, Pistons, and FlywheelFor Outboard 20HP 20HP JET 1B000001 andamp Up Crankshaft, Pistons, and Flywheel Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.