0389923 0763922 Evinrude/Johnson Viper TBX 14 1/2 x 21 Stainless Steel Propeller – 15 Spline | Genuine Used Part

🔧 Product Description

Genuine Evinrude Johnson Viper TBX 14 1/2 x 21 Stainless Steel Propeller - Part Number: 0389923 / 0763922

A genuine used Viper three-blade right-hand stainless-steel propeller for large Evinrude, Johnson, OMC and compatible Volvo Penta 15-spline gearcases.

The current 0763922 Viper TBX propeller is nominally 14 1/2 inches in diameter with 21 inches of pitch. It is intended for the 4 3/4-inch large gearcase and uses the appropriate TBX / 15-spline hub components.

⚙️ Key Features

• Genuine BRP Viper large-gearcase propeller
• 14 1/2-inch diameter x 21-inch pitch
• Three-blade stainless-steel construction
• Right-hand rotation for 15-spline 4 3/4-inch gearcases
• High-rake Viper design for cruising speed and bow lift

🚤 Compatibility

Commonly used on

• Evinrude and Johnson 4 3/4-inch large gearcases with 15-spline shafts
• Compatible OMC Cobra, Sea Drive and Volvo Penta SX propeller systems

Typically suits

• Engine models:
• Johnson / Evinrude 90HP, 100HP, 115HP, 120HP, 125HP, 130HP and 140HP models fitted with the 4 3/4-inch 15-spline gearcase
• Johnson / Evinrude 135HP, 150HP, 155HP, 175HP and 185HP V6 outboards
• Johnson / Evinrude 200HP, 225HP, 235HP, 250HP, 275HP and 300HP V6 / V8 outboards
• Evinrude E-TEC 90HP, 115HP and 130HP 25-inch models with the large 15-spline gearcase
• Evinrude E-TEC 135 H.O., 150HP, 175HP, 200HP, 225HP, 250HP and 300HP
• Evinrude E-TEC G2 150HP, 175HP, 200HP, 225HP, 250HP and 300HP
• OMC Sea Drive 2.0L, 2.6L, 3.0L and 4.0L installations
• OMC Cobra / King Cobra V6 and V8 sterndrives using the 15-spline propeller shaft
• Volvo Penta SX sterndrives using the compatible OMC-pattern 15-spline propeller shaft
• HP Range: 90HP - 300HP, plus compatible sterndrives
• Engine Type: Evinrude / Johnson V4, V6, V8, E-TEC and E-TEC G2 outboard; compatible sterndrive
• Year Range: Approximately mid-1970s onward, gearcase and hub controlled

🔌 Function

The propeller converts torque into thrust. The 21-inch pitch is generally selected for lighter or faster boats capable of carrying the pitch while keeping engine RPM within the specified operating range.

⚠️ Common Signs of Failure

• Blades are bent, chipped, cracked or out of track
• The rubber hub slips and engine RPM rises without matching boat speed
• Propeller vibration increases with engine speed
• Cavitation, ventilation or poor acceleration develops after impact damage
• Hub splines, drive-pin surfaces or thrust faces are worn or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0763922 → Supersedes 0389923
• 0389923 earlier 21-pitch OEM reference

OEM / Related Numbers

• 0389923
• 389923
• 0763922
• 763922

Aftermarket / Verified Equivalents

• Solas Rubex HR3: 14 1/2 x 21 stainless-steel alternative with correct OMC 15-spline hub
• Michigan Wheel Apollo: 14 1/2 x 21 stainless-steel alternative
• Turning Point Express / Mach-series: 21-pitch stainless-steel alternative with compatible hub

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated