OEM & Cross Reference Numbers

OMC Cobra Sterndrive Fitment

The Pro Marine 83877 bearing fits a large number of OMC Cobra sterndrive applications. The supplied application data covers model years 1986 through 1993.

Representative Verified Model Numbers

The following are examples from the supplied fitment. They are not intended to replace the complete application list.

What This Bearing is Used For

The U-joint shaft assembly transfers rotational power through the sterndrive driveline. Bearings in this assembly support the rotating shaft and help maintain proper alignment while the drivetrain is operating.

A worn or damaged bearing can allow excessive movement, noise or roughness in the U-joint shaft assembly. Because this area operates under significant load, bearing condition should be checked whenever the drive is removed or the U-joint shaft assembly is being serviced.

Common Signs of U-Joint Shaft Bearing Wear

• Grinding or rumbling noise from the drive area
• Roughness when rotating the shaft by hand
• Excessive bearing play
• Vibration from the driveline
• Visible corrosion on the bearing
• Water intrusion into the U-joint / bellows area
• Bearing damage found during drive service
• Abnormal wear on related shaft components

Why Inspect the U-Joint Area During Drive Service?

The U-joint area is normally accessible when the sterndrive is removed. This makes routine drive service a good opportunity to inspect the U-joints, shaft bearings, bellows, seals and related driveline components.

Water intrusion or a damaged bellows can quickly contaminate bearings and other components. Any roughness, corrosion or excessive play should be investigated before the drive is returned to service.

Key Features and Benefits

• Pro Marine aftermarket OMC Cobra U-joint shaft bearing
• Pro Marine part number 83877
• Replaces OMC 0778117
• Replaces OMC 0983877 / 983877
• Cross references Sierra 18-1172
• Cross references 21542
• Cross references 878999
• Fits select 1986 OMC Cobra sterndrives
• Fits select 1987 OMC Cobra sterndrives
• Fits select 1988 OMC Cobra sterndrives
• Fits select 1989 OMC Cobra sterndrives
• Fits select 1990 OMC Cobra sterndrives
• Fits select 1991 OMC Cobra sterndrives
• Fits select 1992 OMC Cobra sterndrives
• Fits select 1993 OMC Cobra sterndrives

FAQ

What OEM numbers does Pro Marine 83877 replace?
It cross references OMC 0778117 and 0983877, along with Sierra 18-1172, 21542 and 878999.

Is 983877 the same reference as 0983877?
The supplied cross-reference information lists 0983877. OMC part numbers are also commonly searched without the leading zero as 983877.

What years does bearing 83877 fit?
The supplied application data includes a broad range of OMC Cobra sterndrives from 1986 through 1993.

Does this fit 1986 OMC Cobra drives?
Yes. The supplied fitment includes numerous 1986 applications such as 252AMKWB, 252APKWB, 302AMKWB, 432AMKWB, 434AMKWB, 504AMKWB, 574AMKWB and related models.

Does it fit 1987 and 1988 OMC Cobra?
Yes. A large number of 1987 FT / SR / AR configurations and 1988 RGDP / RGDE configurations are included.

Does it fit 1989-1991 Cobra drives?
Yes. Verified applications include numerous 1989 MED-series, 1990 PWR / PWS-series and 1991 RGD-series OMC models.

Does it fit 1992 and 1993 OMC Cobra?
Yes. The supplied list includes numerous 1992 AMH / AMK and 1993 JVB / JVN applications.

Can I order this bearing just by engine size?
No. OMC used different driveline configurations within similar engine families. Use the complete OMC model number and OEM bearing reference to verify the correct part.

When should this bearing be inspected?
Inspect it whenever the sterndrive is removed for U-joint, bellows or driveline service, especially if there has been water intrusion, noise, roughness or excessive shaft movement.

Searchable Terms

83877, Pro Marine 83877, 0778117, OMC 0778117, 0983877, OMC 0983877, 983877, OMC 983877, 18-1172, Sierra 18-1172, 21542, 878999, OMC Cobra U joint shaft bearing, OMC Cobra ujoint bearing, OMC sterndrive bearing, OMC Cobra drive bearing, OMC U joint bearing, OMC Cobra 1986 bearing, OMC Cobra 1987 bearing, OMC Cobra 1988 bearing, OMC Cobra 1989 bearing, OMC Cobra 1990 bearing, OMC Cobra 1991 bearing, OMC Cobra 1992 bearing, OMC Cobra 1993 bearing, OMC 232 bearing, OMC 302 bearing, OMC 432 bearing, OMC 434 bearing, OMC 502 bearing, OMC 504 bearing, OMC 574 bearing, OMC 584 bearing, OMC 744 bearing, OMC 754 bearing