Upper Main Bearing Compatible With Mercury Bigfoot 60 Hp Jet 30 40 45 Hp 50 55 60 Hp 3-Cyl 30 40 Hp

PART NUMBERS:
• 31-818889A1 31818889A1

ITEM SPECIFICATIONS:
• Component: Upper Main Bearing
• Engine: 2-Cyl / 3-Cyl / 4-Cyl
• Horsepower: 30-60 HP
• Brand: Mercury / Mariner

COMPATIBLE MODELS:
• 2-Cyl 2.992 Bore: 30/40 HP (1994-2007)
• 3-Cyl 2.992 Bore: 50/55/60 HP (1998-2014)
• 3-Cyl: 40 HP (1998-2005), Bigfoot 60 (1997-2004)
• 3-Cyl Jet: 30/40/45 HP (1997-2005)
• 4-Cyl 4-Stroke: 60 HP (2014)
• Applicable Mariner models by part number

PRODUCT DETAILS:
This upper main bearing is designed for Mercury and Mariner outboard motors in the 30 through 60 HP range spanning 2-cylinder, 3-cylinder, and 4-cylinder configurations produced from 1994 through 2014. The bearing fits the 2-cylinder 2.992 bore 30 and 40 HP models, the 3-cylinder 2.992 bore 50, 55, and 60 HP models, the 3-cylinder 40 HP, the Bigfoot 60 HP, and the 3-cylinder jet drive models in 30, 40, and 45 HP. Also compatible with the 4-stroke 4-cylinder 60 HP model from 2014, demonstrating the wide application range of this bearing across Mercury's mid-range outboard lineup. 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. A worn upper main bearing causes increased engine noise, crankshaft misalignment, power loss, and can lead to serious powerhead damage if not replaced during service. Manufactured to specifications for proper fit and reliable performance in Mercury and Mariner outboard engine applications. Verify your part number before ordering to confirm correct application for your specific Mercury or Mariner outboard.

PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.

WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov