Rareelectrical Upper Main Bearing with Seal Compatible with Mercury 1.5L Optimax 3-Cyl Outboard 75 80 90 115 125 Hp 2004-2014 Mariner Replaces 31-879853A01 31879853A01 Crank Bearing New Engine Kit

APPLICATIONS: Mercury Optimax 1.5L 3-Cylinder Outboard: 75 HP (2004-2014) 80 HP (2007-2014) 90 HP (2004-2014) 115 HP (2004-2014) 125 HP (2008-2012) Bore: 3.6255 inches Seal: With Seal Mariner: Compatible by part number Component: Upper Main Bearing CROSS REFERENCE: 31-879853A01 31879853A01 SPECIFICATIONS: Type: Upper Main Bearing (With Seal) Engine: 1.5L Optimax 3-Cylinder Bore: 3.6255 inches Horsepower: 75 / 80 / 90 / 115 / 125 HP Brand: Mercury / Mariner Model Years: 2004-2014 Quantity: 1 Per Package PRODUCT DETAILS: Direct replacement upper main bearing with seal for Mercury and Mariner 1.5L Optimax 3-cylinder outboard engines covering 75, 80, 90, 115, and 125 HP models produced between 2004 and 2014. The integrated seal design combines the crankshaft bearing and crankcase seal into a single component, simplifying installation and ensuring proper sealing at the upper main bearing position. Mercury's Optimax direct fuel injection system was used across this entire engine family, providing the efficiency advantages of direct injection while maintaining the power-to-weight ratio of a 2-stroke design. All five horsepower ratings in this family share the same 3-cylinder block with 3.6255 inch bore, and the upper main bearing is common across all configurations from the entry-level 75 HP through the top-of-range 125 HP. The upper main bearing supports the crankshaft at the top of the powerhead and must handle the radial loads from crankshaft rotation during outboard engine operation. Manufactured to match specifications for reliable performance in Mercury Optimax outboard powerhead applications. Always confirm your model and part number before purchasing to verify proper fitment for your Mercury or Mariner outboard.

• Compatible with Mariner,Mercury. Please verify your OEM part number from your original unit to help ensure fitment.
• Replaces: Part Numbers: / 31-879853A01 31879853A01 / Item Specifications: / Component: Upper Main Bearing (With Seal) / Engine: 1.5L Optimax 3-Cylinder / Horsepower: 75/80/90/115/125 Hp / Brand: Mercury / Mariner / Compatible Models: / Mercury Optimax 1.5L 3-Cyl 75 Hp (2004-2014) / Mercury Optimax 1.5L 3-Cyl 80 Hp (2007-2014) / Mercury Optimax 1.5L 3-Cyl 90 Hp (2004-2014) / Mercury Optimax 1.5L 3-Cyl 115 Hp (2004-2014) / Mercury Optimax 1.5L 3-Cyl 125 Hp
• Applications: Applications: / Mercury Optimax 1.5L 3-Cylinder Outboard: / 75 Hp (2004-2014) / 80 Hp (2007-2014) / 90 Hp (2004-2014) / 115 Hp (2004-2014) / 125 Hp (2008-2012) / Bore: 3.6255 Inches / Seal: With Seal / Mariner: Compatible By Part Number / Component: Upper Main Bearing
• Applications: ...
• Upper Main Bearing Source: Aftermarket