Rareelectrical Upper Main Bearing Compatible with 1976-1997 Mercury 6-Cyl 2.4L Chrome Bore 175 200 Hp 2L 3.125 Bore 135 150 175 Hp 3-Cyl 60 Hp Mariner Outboard Replaces 31-74248 3174248 Engine New

Mercury / Mariner Outboard (1976-1997): 3-Cyl 2.955 Bore Looper: 60 HP (1991-1997) 6-Cyl 3.125 Bore 2L: 135/150/175 HP (1976-1989) 6-Cyl 3.375 Bore 2.4L: 175/200 HP (1978-1988) Inner Diameter: 1-1/2 inch applicable Mariner models by part number Component: Upper Main Bearing PART NUMBERS: 31-74248 / 3174248 31-74248T / 3174248T SPECIFICATIONS: Type: Upper Main Bearing Inner Diameter: 1-1/2 inch (38.1mm) Engine: 3-Cylinder / 6-Cylinder 2-Stroke Displacement: 2L / 2.4L Horsepower: 60 / 135 / 150 / 175 / 200 HP Brand: Mercury / Mariner Model Years: 1976-1997 Quantity: 1 Per Package PRODUCT DETAILS: Direct replacement upper main bearing for Mercury and Mariner 2-stroke outboard engines with 1-1/2 inch crankshaft journal diameter covering the 3-cylinder Looper 60 HP and 6-cylinder 2L and 2.4L models from 1976 through 1997. This bearing fits the 6-cylinder Mercury 2-liter engine in 135, 150, and 175 HP variants with 3.125 bore, and the 2.4-liter engine in 175 and 200 HP with 3.375 bore including both standard and chrome bore configurations. Also compatible with the 3-cylinder 2.955 bore Looper 60 HP model which shares the same upper main bearing specification. The upper main bearing supports the crankshaft at the top of the powerhead and proper bearing condition is essential for crankshaft alignment and engine reliability in these classic Mercury outboards. A failing upper main bearing presents as engine noise, vibration, reduced power, or visible crankshaft play during inspection. Manufactured to match specifications for reliable performance in Mercury outboard powerhead applications. Always confirm your model and part number before purchasing to verify fitment. Check your model and part number before ordering to verify correct application for your outboard.

• Compatible with Mariner,Mercury. Please verify your OEM part number from your original unit to help ensure fitment.
• Replaces: Part Numbers: / 31-74248 / 3174248 / 31-74248T / 3174248T / Specifications: / Component: Upper Main Bearing (1-1/2" Id) / Engine: 3-Cyl / 6-Cyl 2-Stroke 2L / 2.4L / Horsepower: 60-200 Hp / Brand: Mercury / Mariner / Applications: / 3-Cyl 2.955 Bore Looper: 60 Hp (1991-1997) / 6-Cyl 3.125 Bore 2L: 135/150/175 Hp (1976-1989) / 6-Cyl 3.375 Bore 2.4L: 175/200 Hp (1978-1988) / Applicable Mariner Models By Part Number / Product Details: / Direct
• Applications: Mercury / Mariner Outboard (1976-1997): / 3-Cyl 2.955 Bore Looper: 60 Hp (1991-1997) / 6-Cyl 3.125 Bore 2L: 135/150/175 Hp (1976-1989) / 6-Cyl 3.375 Bore 2.4L: 175/200 Hp (1978-1988) / Inner Diameter: 1-1/2 Inch / Applicable Mariner Models By Part Number / Component: Upper Main Bearing
• Applications: ...
• Upper Main Bearing Source: Aftermarket