15K ½ 13 Propeller
Product description
Propeller 13 ½ × 15-K offers a combination of strong acceleration, economical cruising speed, and long-lasting durability in the corrosive marine environment. If you’re looking to noticeably improve the performance of your 85 to 150 hp boat without a hefty cost, this model is a reliable choice.
Product Summary:
1. The 13 ½ × 15-K propeller is designed for Yamaha 85 to 150 hp engines and delivers optimal performance on high-speed recreational and light commercial boats.
2. With a diameter of 13 ½ inches and a pitch of 15-K, it provides an ideal balance between mid-range acceleration and cruising speeds of 30 to 40 mph.
3. Made of high-pressure cast aluminum with a dual-layer coating, it offers exceptional resistance to saltwater corrosion and sand impacts.
4. The stable operating RPM is 2250, and it performs without cavitation up to around 5500 RPM—ideal for long cruises or towing.
5. At cruising speeds of 30 to 40 mph, engine fuel consumption is reported to be up to 11% lower than standard propellers of the same diameter.
Technical specifications
| Feature | Value / Description |
| Model | 13 ½ × 15-K |
| Compatible Engines | Yamaha 85–150 HP (2-stroke & 4-stroke – max RPM: 5500) |
| Propeller Diameter | 13 ½ inches |
| Pitch | 15-K (for towing power and high cruising speed) |
| Recommended Operating RPM | 2250 RPM (stable cruising) |
| Optimal Water Speed | 30 – 40 mph |
| Material | High-pressure aluminum + dual-layer epoxy coating |
| Applications | High-speed recreational boats, fishing tours, water taxis ≤ 1.5 t load |
| Durability | Corrosion-resistant and sand abrasion-resistant |
| Warranty | 12 months |
The statistics are based on factory testing on a 6.2 m fiberglass boat with 5 crew members and 150 kg of side load.
Key technical specifications
Torque
150 Nm
Power
4700-5200 RPM
Material
Aluminium
Flexibility
205 MPa
Endurance
4800 RPM In 150h
Motor Horsepower
80 - 150 HP
Torque
● Three-blade design with reinforced root and 15-K pitch increases low-end torque by up to 12% compared to 17-P propellers; faster hole shot even with full load.
● Fixed 13° RAKE + adaptive CAMBER creates a spiral and steady water flow; the 150 HP engine delivers up to 150 N·m of usable torque in mid-range — sufficient for towing skiers or tubes in choppy water.
● Fixed 13° RAKE + adaptive CAMBER creates a spiral and steady water flow; the 150 HP engine delivers up to 150 N·m of usable torque in mid-range — sufficient for towing skiers or tubes in choppy water.
Horsepower Utilisation
● The 15-K pitch enables 85–150 HP engines to operate within the optimal 5200–4700 RPM range; fuel consumption is reduced by up to 11% compared to flat-blade props.
● In steady-speed testing at 35 mph on calm sea, fuel consumption was measured at 12.4 L/h for a 115 HP engine.
● No cavitation was observed in short waves, and rope tension remained stable.
● In steady-speed testing at 35 mph on calm sea, fuel consumption was measured at 12.4 L/h for a 115 HP engine.
● No cavitation was observed in short waves, and rope tension remained stable.
Flexibility
● Alloy rated at 205 MPa with 4% elasticity makes the blades resistant to impacts from floating objects.
● Hot-Spun Hub with rubber bushing absorbs 65% of torsional shock — reducing transmission of force to the gearbox.
● Blades can be hot-straightened (Prop-Tune) up to three times to repair bends.
● Hot-Spun Hub with rubber bushing absorbs 65% of torsional shock — reducing transmission of force to the gearbox.
● Blades can be hot-straightened (Prop-Tune) up to three times to repair bends.
Durability
● Single-phase epoxy coating withstands 800 hours in ASTM B117 salt spray testing.
● Hardened leading edge (Hard-Edge) doubles the lifespan of the attack edge.
● 150-hour continuous test at 4800 RPM showed no pitch loss or surface cracking.
● Hardened leading edge (Hard-Edge) doubles the lifespan of the attack edge.
● 150-hour continuous test at 4800 RPM showed no pitch loss or surface cracking.
Colors & Finish
| Recommended Color & Code | Type of Coating & Visual Finish | Suggested Advantage / Application |
|---|---|---|
| Silver Matte | Epoxy powder coating; low light reflection | Matches most fiberglass hulls; hides scratches well |
| Graphite Black | Semi-matte with microcrystal particles | Camouflages on dark transoms; reduces glare |
| Marine Pearl White | Dual-layer pearlescent gloss | Pairs with white hulls; easy salt stain cleanup |
| Navy Blue | Glossy polyurethane coating | Professional look for patrol boats; good underwater visibility |
| Sport Red | Glossy epoxy with UV-resistant pigment | Enhanced safety visibility; ideal for ski & racing boats |
| Aquamarine Green | Semi-transparent metallic overlay | Blends with shallow waters; unique for ecotourism boats |
| Titanium Grey | Hard anodized + clear lacquer | Maximum abrasion resistance; industrial luxury look |
| Solar Gold | Dual-layer metallic powder coating | Eye-catching for exhibitions; reflects warm light |
| Signal Orange | Matte polyurethane, UV-resistant | Best emergency visibility; recommended for rescue teams |
| Thunder Purple | Glossy metallic with dual-tone shimmer | Unique sunlight effect; ideal for custom branding |
Recommended Color & Code:
Silver Matte
Coating Type & Finish:
Epoxy powder coating; low light reflection
Benefit / Suggested Use:
Matches most fiberglass hulls; minimizes visible scratches
Recommended Color & Code:
Graphite Black
Coating Type & Finish:
Semi-matte with microcrystal particles
Benefit / Suggested Use:
Perfect camouflage on dark transom; absorbs light and reduces glare
Recommended Color & Code:
Marine Pearl White
Coating Type & Finish:
Dual-layer pearlescent gloss
Benefit / Suggested Use:
Matches white hulls; easy to clean salt stains
Recommended Color & Code:
Navy Blue
Coating Type & Finish:
Glossy polyurethane coating
Benefit / Suggested Use:
Professional look for patrol boats; better visibility underwater
Recommended Color & Code:
Sport Red
Coating Type & Finish:
Glossy epoxy with UV-resistant pigment
Benefit / Suggested Use:
Increased safety visibility; ideal for ski and racing boats
Recommended Color & Code:
Aquamarine Green
Coating Type & Finish:
Semi-transparent metallic coating
Benefit / Suggested Use:
Blends with shallow waters; unique look for eco-tour boats
Recommended Color & Code:
Titanium Grey
Coating Type & Finish:
Hard anodized + clear lacquer
Benefit / Suggested Use:
Maximum abrasion resistance; premium industrial appearance
Recommended Color & Code:
Solar Gold
Coating Type & Finish:
Dual-layer metallic powder coating
Benefit / Suggested Use:
Eye-catching in exhibitions; reflects warm light
Recommended Color & Code:
Signal Orange
Coating Type & Finish:
Matte UV-resistant polyurethane
Benefit / Suggested Use:
Best emergency visibility; recommended for rescue teams
Recommended Color & Code:
Thunder Purple
Coating Type & Finish:
Metallic gloss with dual-tone spectrum
Benefit / Suggested Use:
Unique sunlit appearance; ideal for custom branding
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