1. Technical Specifications

2. Key Features

• Heavy-Duty Thrust & Quick Hole-Shot: The 13-5/8" large diameter combined with a 13" shallow pitch delivers immense water displacement and low-end torque, dramatically reducing time-to-plane under heavy boat loads.

• Shock-Absorbing Pressed-in Hub: Heavy-duty vulcanized rubber hub absorbs driveline torsion and impact shocks from submerged logs or rocks, protecting the propshaft and lower unit gear train.

• Dynamic Balancing & Low Drag Blade Profile: Each unit is dynamic-balance calibrated with precision hydrofoil blade edges, eliminating cruising vibration and enhancing fuel economy.

• Corrosion-Resistant Baked Enamel Coating: Multi-stage chemical surface passivation and factory-matched white baked paint provide robust protection against saltwater galvanic corrosion and marine fouling.

3. Compatible Models

Primarily compatible with Yamaha 4-1/4" gearcase outboards using the "K" series 15-spline propeller shaft:

• Yamaha 2-Stroke Series: 60HP (large gearcase models), 70HP, 75HP, 80HP, 85HP, 90HP (3-cylinder engines like 90AEO)

• Yamaha 4-Stroke Series: T50, T60 (High Thrust), F70, F75, F80, F90, F100, F115

• Outboard Clones: Compatible with Parsun, Hidea, Seapro, and other outboard brands utilizing the Yamaha "K" series 15-tooth spline 4-1/4" lower gearcase

4. Aftermarket & Brand Compatibility

• OEM Brand Fitment:

• Yamaha Marine: Designed for genuine Yamaha 60HP through 130HP outboard lower unit propulsion systems.

• PREMARINE Brand Aftermarket Replacement:

• PREMARINE Quality Standard: PREMARINE specializes in high-reliability marine propellers, hardware kits, and driveline components. This aluminum propeller is produced with high-pressure vacuum die-casting and robotic balancing lines.

• Direct OEM-Level Performance: Pitch accuracy, spline broach tolerances, and hub slip torque resistance meet or exceed OEM specifications, serving as the premier cost-effective choice for propeller replacement and onboard spares.

5. Common Symptoms & Troubleshooting

• Engine Revs High but Boat Lacks Forward Thrust (Spun Prop Hub):

• Cause: Inner rubber hub torn or delaminated from severe underwater impact or age degradation, causing the spline core to spin freely inside the outer barrel.

• Troubleshooting: Scribe a reference line across the inner bronze spline and outer aluminum hub; run the boat and check for mark misalignment. Replace the propeller if slipped.

• Heavy Hull Vibration and Tiller Shaking Underway:

• Cause: Bent blade tips, nicks, or loss of blade symmetry from hitting underwater obstructions.

• Troubleshooting: Visually inspect blade edges; repair minor dings or replace damaged propellers immediately to prevent lower unit shaft seal and bearing failure.

• Engine Fails to Reach Target WOT RPM (Engine Lugging):

• Cause: Boat is over-propped with too high a pitch for the current payload.

• Troubleshooting: Dropping down to this 13-pitch propeller restores engine operating RPM into its peak power band (5000–5500 RPM) under heavy loads.

OEM Part Numbers

Compatible OEM references include:

6E5-45949-00-EL

6E5-45949-51-EL

6E5-45949-00

Compatible Engine Models

This Aluminum Propeller is primarily designed for:

2-Stroke 60/70/75/80/85/90HP

4-Stroke 50/60/70/75/80/90/100/115HP

If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.

Applications

This Aluminum Propeller is commonly used for:

Outboard engine repair

Engine rebuilding projects

Marine maintenance workshops

Boat fleet maintenance

Commercial fishing vessels

Recreational boats

Marine spare parts distribution