6K1-45978-00-98 6K1-45978-02-00 Yamaha M/T Series 13 3/4 x 17 LH Stainless Steel Propeller – 15 Spline | Genuine Used Part

🔧 Product Description

Genuine Yamaha M/T Series 13 3/4 x 17 Left-Hand Stainless Steel Propeller - Part Number: 6K1-45978-00-98 / 6K1-45978-02-00

A genuine used Yamaha three-blade left-hand black-painted stainless-steel propeller for counter-rotation Yamaha large gearcases.

This is a port-side / counter-rotation propeller for twin- and multi-engine installations. It must be fitted only to a gearcase designed to rotate the propeller counter-clockwise when viewed from astern.

⚙️ Key Features

• Genuine Yamaha Marine M/T Series propeller
• 13 3/4-inch diameter x 17-inch pitch
• Three-blade painted stainless-steel construction
• Left-hand / counter-clockwise rotation
• Pressed 15-spline hub for the 4 3/4-inch large gearcase

🚤 Compatibility

Commonly used on

• Yamaha counter-rotation 4 3/4-inch large gearcases
• Port-side engines in twin- and multi-engine installations

Typically suits

• Engine models:
• Yamaha L150, L175, L200, L225, L250 and L300 counter-rotation two-stroke outboards
• Yamaha LZ150, LZ175, LZ200, LZ225 and LZ250 HPDI counter-rotation models
• Yamaha LF150, LF175, LF200, LF225, LF250 and LF300 counter-rotation four-strokes
• Twin- and multi-engine installations where the port gearcase is configured for left-hand rotation
• Not suitable for a standard right-hand gearcase
• HP Range: 150HP - 300HP
• Engine Type: Yamaha counter-rotation V6 two-stroke, HPDI or large four-stroke outboard
• Year Range: Approximately mid-1980s onward, gearcase and rotation controlled

🔌 Function

The propeller produces left-hand thrust for the port gearcase. Opposite propeller rotations in a twin installation reduce steering torque and improve straight-line tracking and manoeuvrability.

⚠️ Common Signs of Failure

• Blades are bent, chipped, cracked or out of track
• The 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, thrust faces or retaining surfaces are worn or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6K1-45978-02-00 → Supersedes 6K1-45978-02-98
• 6K1-45978-02-98 → Supersedes 6K1-45978-01-98
• 6K1-45978-01-98 → Supersedes 6K1-45978-00-98 and 6K1-45978-00-00

OEM / Related Numbers

• 6K1-45978-00-00
• 6K1-45978-00-98
• 6K1-45978-01-98
• 6K1-45978-02-98
• 6K1-45978-02-00
• Yamaha M/T 13 3/4 x 17 left-hand propeller

Aftermarket / Verified Equivalents

• Solas HR Titan 3 left-hand: 13 3/4 to 14 x 17 stainless-steel alternative with Yamaha hub
• Solas Rubex HR3 left-hand 17-pitch propeller with RBX-203 Yamaha hub
• Michigan Wheel Apollo: 17-pitch left-hand stainless-steel modular-hub alternative
• Yamaha Saltwater Series left-hand 17-pitch stainless-steel functional upgrade

📦 Condition

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