Yamaha Hub Assembly | Piranha Propellers YC3 Piranha Propellers Yamaha Hub Assembly | YC3 This assembly includes: CHYC Center Hub RCOC Rear Cap SSWA 5/8Flatwasher Greasepkt Piranha Sticker Info Brochure Instruction Booklet This assembly is used by:Yamaha: 60.0, 55.0, 50.0, 48.0, 40.0, 30.0, 25.0 HP Piranha Propellers are known for their high-strength composite material and their modular construction. The unique hub design allows for fast, easy on-the-go propeller repair, saving boaters time and money. The center hub is made with an aluminum core that is overmolded with the same high-strength composite as the blades. Every Piranha blade includes HydroBites, which are precision ridges that improve hole shot, reduce vibration, and control ventilation during tight turns. The rear cap completes the propeller by holding the blades in place in the hub. Piranha blades are designed to absorb the shock of a propeller strike, protecting the lower unit, gears and prop shaft from damage. Each blade is manufactured from a specially formulated high-strength aerospace composite material. Every Piranha blade comes with HydroBites — precision ridges that improve hole shot, reduce vibration and control ventilation associated with tight turns. The rear cap completes the propeller and secures the blades in the hub. The boat propeller from Piranha offers the fastest repair time around, but it’s important to have the parts to do the repair with. Whether you use 3 blade boat propellers or 4 blade boat propellers, since you can’t break more blades than are on the prop, we encourage you to simply carry a full spare set. True, you probably won’t damage them all at once, but this way you can ensure the propeller remains properly balanced and maintains the correct propeller pitch. Besides, won’t you feel better knowing you can fix it if you do, without ruining the rest of your day?