Piranha Propellers Complete A-Series 4-Blade Propeller | 4.5" Gearcase 120–260HP I/O & 150–250HP OB

Piranha Propellers Complete A-Series 4-Blade Propeller — Ready-to-Run 4-Blade Prop for 4.5" Gearcase I/O and High-HP Outboards

The Piranha A-Series 4-Blade Complete Propeller gives you everything you need to get on the water in one package: a fully assembled, ready-to-install 4-blade prop built from aerospace-grade composite material and engineered for performance, durability, and on-the-water repairability. Select your blade set diameter and pitch, then choose your engine manufacturer to get the correct hub configuration for your application.

Backed by a lifetime hub assembly guarantee and proudly Made in the USA.

Part Specifications

• Application: 4.5" Gearcase Diameter — 120–260HP I/O | 150–250HP Outboards
• Blade Configuration: 4-Blade (RH standard; LH variants available — see blade size selector)
• Blade Material: High-strength aerospace composite
• Hub Core: Aluminum core over-molded with aerospace composite
• Technology: HydroBites precision ridges (hole shot, vibration, ventilation control)
• Guarantee: Lifetime hub assembly guarantee

Propeller Includes:

• 1 × Piranha Propellers Hub Kit (hub configuration matched to selected engine manufacturer)
• 1 × Piranha Propellers A-Series 4-Blade Set (diameter and pitch selected above)

A complete Piranha Propeller consists of the Hub, 4 Blades, and the Cap. This listing includes one full blade set and the hub — everything needed for a complete, ready-to-install propeller. Spare blade sets, wrench kits, and gear bags are available separately in the Piranha A-Series 4-Blade Propulsion Kit.

Compatible Engine Brands

Mercury, Mercruiser, Yamaha, Honda, Evinrude, Johnson, Suzuki, Mariner, Volvo Penta, Volvo SX, Cobra SX, OMC Cobra 800. Select your engine manufacturer from the dropdown to ensure the correct hub is included with your order.

Why Piranha Composite Outperforms Standard Aluminum Props

• Stronger than aluminum — aerospace-grade composite built to outlast traditional metal props in salt and fresh water
• Shock-absorbing blade design — engineered to take the impact of a strike and protect your lower unit, gears, and prop shaft
• HydroBites technology — precision ridges on every blade that improve hole shot, reduce vibration, and control ventilation in tight turns
• Repair or re-pitch in minutes — individual blades are field-replaceable without special tools
• Corrosion-resistant — no rust, no pitting, season after season
• Saves on repair costs — replace only the damaged blade, not the entire propeller
• Made in the USA — lifetime hub assembly guarantee included

Installation Notes

• Confirm 4.5" gearcase diameter and HP rating for your specific engine make, model, and year before ordering
• Select your engine manufacturer at checkout — hub configuration is specific to engine brand and is not interchangeable
• LH (left-hand) blade variants are available for counter-rotating applications — confirm outdrive rotation direction before ordering
• Install per your engine manufacturer’s prop shaft torque and retaining nut specifications
• Always carry a spare blade set on board — individual blades are field-replaceable in approximately 5 minutes without special tools
• Re-pitch is possible by swapping to a different blade set pitch without replacing the hub

Additional Information

• Vendor: Piranha Propellers
• SKU: PIRANHA-A-4B (base)
• Product Type: Piranha Complete Propeller
• Country of Origin: USA
• HS Code: 8487.90 (propeller parts and accessories — verify for your import classification)

Frequently Asked Questions

Q: What’s included with this propeller listing?
A: One Piranha Hub Kit and one A-Series 4-Blade Set — a complete, ready-to-install propeller. It does not include a spare blade set, wrench kit, or gear bag. For the full backup kit, see the Piranha A-Series 4-Blade Propulsion Kit.

Q: How do I choose the right blade set diameter and pitch?
A: Select your desired diameter and pitch from the Blade Set Dia x Pitch dropdown, then choose your engine manufacturer to get the correct hub. If you’re unsure which pitch is right for your setup, contact us before ordering and we’ll help you dial it in.

Q: What engines is the A-Series 4-Blade compatible with?
A: Designed for 4.5" gearcase I/O drives rated 120–260HP and outboards rated 150–250HP. Compatible brands: Mercury, Mercruiser, Yamaha, Honda, Evinrude, Johnson, Suzuki, Mariner, Volvo Penta, Volvo SX, Cobra SX, and OMC Cobra 800. Select your engine manufacturer to ensure the correct hub is included.

Q: How does Piranha composite compare to a standard aluminum propeller?
A: Piranha’s aerospace-grade composite is stronger than aluminum, lighter, and completely corrosion-resistant. When an aluminum prop gets damaged, you replace the whole thing. With Piranha, you replace only the damaged blade — in minutes, on the water — at a fraction of the cost. The modular design also allows re-pitching by swapping blade sets without buying a new hub.

Q: Can I repair this propeller if a blade gets damaged?
A: Yes — individual blades are field-replaceable in about 5 minutes without special tools. Keep a spare blade set on board so you’re never stranded. Piranha replacement blade sets for the A-Series 4-Blade are available separately.