O4347K COMPROP 12.8 x 17 Four-Blade Composite Propeller – Evinrude/Johnson 13 Spline | Genuine Used Part

🔧 Product Description

Genuine COMPROP O4347K Four-Blade Composite Propeller - Part Number: O4347K

A genuine used COMPROP four-blade right-hand composite propeller for Evinrude and Johnson 13-spline mid-range and V4 gearcase applications.

The O4347K propeller is nominally 12.8 inches in diameter with 17 inches of pitch. Its lightweight composite construction and four-blade layout are designed for smooth operation, strong cornering grip and efficient acceleration.

⚙️ Key Features

• Genuine COMPROP composite propeller
• Correct model O4347K; supplied listing variant 04347K
• Approximately 12.8-inch diameter x 17-inch pitch
• Four-blade right-hand construction
• 13-spline Evinrude / Johnson application

🚤 Compatibility

Commonly used on

• Evinrude and Johnson 13-spline outboard propeller systems
• Mid-range and V4 gearcases where diameter, clearance and WOT RPM are suitable

Typically suits

• Engine models:
• Johnson / Evinrude 40HP and 48HP twin-cylinder outboards with the compatible 13-spline gearcase
• Johnson / Evinrude 50HP, 55HP, 60HP, 65HP, 70HP and 75HP outboards with the compatible 13-spline gearcase
• Evinrude E-TEC 40HP, 50HP, 55HP and 60HP
• Johnson 40HP, 50HP, 60HP and 70HP four-stroke models where the same 13-spline gearcase is fitted
• Selected Johnson / Evinrude 75HP-140HP V4 gearcases where the 12.8-inch diameter clears and the 17-pitch load is suitable
• HP Range: 40HP - 140HP, gearcase and clearance controlled
• Engine Type: Evinrude / Johnson two-stroke, E-TEC and applicable four-stroke outboard
• Year Range: Application controlled by gearcase, spline count, propeller clearance and WOT RPM

🔌 Function

The propeller converts torque into thrust. Four blades increase blade area, which can improve grip, handling, stern lift and smoothness compared with a similar three-blade propeller.

⚠️ 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

• O4347K current known COMPROP model reference

OEM / Related Numbers

• O4347K
• 04347K
• COMPROP O4-347K

Aftermarket / Verified Equivalents

• Solas Amita 4: equivalent 17-pitch four-blade aluminium 13-spline application
• Turning Point Hustler four-blade: 17-pitch aluminium alternative with compatible hub
• Solas Amita 3 / Rubex 3: 17-pitch three-blade aluminium alternatives

📦 Condition

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