Upper Main Bearing Compatible With 1985-2014 Mercury 4-Cyl Looper 100 115 125 Hp 3-Cyl 65 70 75 80

PART NUMBERS:
• 31-43013A1 / 3143013A1
• 31-43013T1 / 3143013T1
• 31-43013T3 / 3143013T3 (supersedes A1 and T1)

SPECIFICATIONS:
• Component: Upper Main Bearing
• Engine: 3-Cyl / 4-Cyl 2-Stroke Looper + 1.5L Optimax
• Horsepower: 65-125 HP
• Brand: Mercury / Mariner

APPLICATIONS:
• 3-Cyl Looper 3.375/3.500 Bore: 65/70/75/80/90 HP (1987-2006)
• 4-Cyl Looper 3.375/3.500 Bore: 80/100/115/125 HP (1985-2006)
• 1.5L Optimax 3.6255 Bore: 75/90 HP (2010-2014)
• Applicable Mariner models by part number

PRODUCT DETAILS:
Direct replacement upper main bearing for Mercury and Mariner outboard engines covering Looper and Optimax configurations from 65 through 125 HP produced between 1985 and 2014. The part number 31-43013T3 supersedes both the original 31-43013A1 and the 31-43013T1, and this bearing is compatible with applications calling for any of the three part numbers. Fits the 3-cylinder Looper models in 3.375 bore (70, 75, 80, 90 HP) and 3.500 bore (65, 75, 90 HP), the 4-cylinder Looper models in 3.375 bore (100, 115 HP) and 3.500 bore (80, 100, 115, 125 HP), and the 1.5L Optimax 75 and 90 HP. 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. A failing upper main bearing presents as increased engine noise, vibration, or reduced power output. Manufactured to match specifications for reliable performance in Mercury outboard powerhead applications. Always confirm your model and part number before purchasing to verify fitment.

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