0354731 Evinrude Johnson O-Ring | Genuine OEM BRP Outboard Part

🔧 Product Description

Genuine BRP Evinrude Johnson Driveshaft Bearing Housing O-Ring - Part Number: 0354731

A genuine BRP large gearcase O-ring used to seal the driveshaft bearing housing in selected Evinrude and Johnson lower units.

The O-ring prevents gear lubricant from escaping around the bearing housing and helps stop water from entering the gearcase.

⚙️ Key Features

• Genuine BRP OEM bearing-housing O-ring
• Correct OEM part number 0354731
• Common unprefixed number 354731
• Large-section gearcase sealing ring
• Used around the driveshaft bearing housing
• Suitable for selected twin-cylinder, three-cylinder, V4 and V6 lower units
• Sierra, EMP and Recmar alternatives available

🚤 Compatibility

Commonly used on selected

• 40HP-60HP twin-cylinder and three-cylinder gearcases
• V4 outboard lower units
• V6 outboard lower units
• Standard-rotation gearcases
• Counter-rotation gearcases
• Selected 40HP-235HP two-stroke applications
• OMC Cobra, Stringer and King Cobra assemblies where the corresponding bearing-housing O-ring is specified

Important fitment note

• Confirm the bearing-housing number and gearcase diagram.
• Do not confuse this O-ring with the propeller-shaft carrier O-ring or water-pump seals.
• Repeated O-ring failure may indicate bearing-housing corrosion or damage.

🔌 Function

The O-ring seals the outside diameter of the driveshaft bearing housing against the gearcase bore.

Installation considerations

• Remove the bearing housing with the proper puller
• Inspect the housing and gearcase bore
• Clean the O-ring groove
• Lubricate the new O-ring with approved gearcase lubricant
• Do not twist or stretch it excessively
• Protect the O-ring from sharp housing edges
• Seat the bearing housing squarely
• Pressure- and vacuum-test the gearcase
• Refill with the specified gear lubricant

⚠️ Common Signs of Failure

• Gear lubricant leaks
• Gear oil becomes milky
• Water enters the lower unit
• Pressure or vacuum test fails
• O-ring is flattened
• Rubber becomes brittle
• Bearing-housing bore is corroded
• Internal gears and bearings show water damage

🔄 Supersession & Cross Reference

OEM Supersession / Related Chain

• 0314728
• 314728
• 0354731
• 354731

Aftermarket / Verified Equivalents

• Sierra: 18-7130
• EMP: 25-00263-1
• Recmar: REC314728
• Generic gearcase O-ring replacing 0314728 / 0354731

Approximate aftermarket catalogue dimensions

• Inside diameter: approximately 2-1/8 inches
• Outside diameter: approximately 2-5/16 inches
• Section thickness: approximately 3/32 inch

Dimension note

• Dimensions are provided only as a cross-check.
• Select the seal by OEM number and bearing-housing application rather than by measurement alone.

📦 Condition

• Genuine BRP Evinrude Johnson OEM part
• Brand new
• Supplied in genuine or equivalent protective packaging