REPLACES PART NUMBERS:
• 812881A1
ITEM SPECIFICATIONS:
• Component: Center Main Bearing Kit
• Includes: Loose Needle Rollers + Outer Race
• Application: Center Main Crankshaft Journal
• Engine Type: 2-Stroke 3-Cylinder Looper Outboard
• Brands: Mercury, Mariner
• HP Range: 45HP-60HP
COMPATIBLE MODELS:
Mercury: 45HP-60HP 3-Cylinder 2-Stroke Looper Outboard (1991-2000)
Mariner: All applicable models by part number
PRODUCT DETAILS:
This center main bearing kit includes loose needle rollers and the outer race for Mercury and Mariner 3-cylinder 2-stroke looper outboard engines from 45 horsepower to 60 horsepower. The center main bearing supports the crankshaft at its center journal position in the 3-cylinder powerhead, providing critical support between the cylinder bores for smooth crankshaft rotation. Compatible with Mercury 3-cylinder looper engines including the 50HP and 60HP with 2.955-inch bore, the 55HP with 2.992-inch bore, and the Jet 45HP model from 1991 through 2000. The loose needle roller design with hardened outer race allows for maximum load capacity at the center main position where crankshaft loads are concentrated during engine operation. Both the needle rollers and outer race should be replaced together during engine rebuild to ensure proper bearing clearance and prevent premature failure from mismatched components. Center main bearing failure can cause catastrophic crankshaft damage and engine seizure if worn bearings are not replaced during powerhead rebuild. Verify your part number before ordering to confirm correct application for your specific engine.
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
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