The OMC Prop Thrust Washer (OEM 126870) is a critical component in the propeller mounting system on Johnson and Evinrude outboards. Positioned between the propeller and the gearcase, this washer is designed to absorb forward thrust loads generated by the prop and transfer that load evenly into the prop shaft and gearcase.
At Buckshot Racing #77, our version of the 126870 thrust washer is manufactured from stainless steel, offering a significant durability and corrosion-resistance upgrade over many original washers.
Function of the Prop Thrust Washer
The thrust washer plays a key role in protecting the lower unit. As the propeller pushes the boat forward, it generates a significant axial load. The 126870 thrust washer absorbs this load and ensures it is properly distributed against the prop shaft and bearing surfaces.
Without a properly fitted thrust washer, the propeller can sit incorrectly on the shaft, leading to misalignment, vibration, hub wear, or damage to the gearcase. Using the correct washer ensures the prop seats properly and operate
smoothly under load.
Stainless Steel Upgrade Advantage
Many original OMC thrust washers were made from standard steel, which can degrade over time due to corrosion, heat, and repeated load cycles. In marine environments—especially saltwater—this can lead to pitting, surface wear, and reduced effectiveness.
The Buckshot Racing #77 stainless steel 126870 thrust washer provides improved resistance to corrosion and long-term durability. Stainless construction helps maintain a smooth contact surface, ensuring consistent load transfer and reducing wear on both the propeller and shaft.
This upgrade is particularly beneficial for high-performance applications, offshore use, and frequent operation in harsh conditions.
Fitment Across Johnson and Evinrude Outboards
The OMC 126870 prop thrust washer fits a wide range of Johnson and Evinrude outboards, commonly referred to as OMC engines. It is used across many V4 and V6 platforms, as well as select inline engines, depending on prop shaft design.
Typical applications include engines ranging from mid-horsepower fishing motors to higher-output performance outboards, where proper propeller alignment and load transfer are essential.
Because OMC used consistent prop shaft and thrust washer designs across multiple years, the 126870 washer remains a widely used replacement part in both recreational and performance setups.
Importance During Prop Installation
Whenever installing or changing a propeller, the thrust washer should be inspected for wear, deformation, or corrosion. A damaged washer can prevent the prop from seating correctly, which may lead to vibration, reduced efficiency, or damage to the prop hub and shaft.
Replacing worn washers with a new stainless steel 126870 thrust washer ensures proper fitment and helps maintain smooth operation.
Built for Performance and Reliability
From everyday fishing setups to high-performance applications, the propeller system must handle significant load and stress. The OMC Prop Thrust Washer 126870, upgraded to stainless steel, provides the strength and durability needed to support consistent performance.
At Buckshot Racing #77, we supply high-quality components designed to improve reliability and extend the life of your drivetrain—whether you're running a workhorse Johnson, a classic Evinrude, or a performance-tuned OMC outboard.