Sierra 18-3777 Prop Nut Kit for Suzuki Outboard, Replaces Suzuki 57630-94300

The Sierra 18-3777 Prop Nut Kit is a complete propeller hardware set built for Suzuki outboard motors. This kit bundles the four pieces needed to properly mount and secure your propeller in one package: a prop nut, a cotter pin, a washer, and a spacer, so you are not hunting down individual hardware pieces separately. The nut is manufactured from metal with a polished gold finish and a hexagonal shape, sized to an M14 thread with a 14 millimeter compatible groove diameter, and rated to an industrial grade standard for durability in continuous marine use.

Sierra engineers this hardware to meet or exceed the performance of the original equipment it replaces, and the company supplies parts to OEM engine manufacturers and boat builders. The kit is designed as a direct cross-reference for Suzuki outboard prop nut assemblies, making it a straightforward replacement when your existing prop hardware is worn, corroded, or missing pieces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3777
• Product Name: Prop Nut Kit
• Number of Pieces: 4
• Included Components: Prop Nut, Cotter Pin, Washer, Spacer
• Material: Metal
• Color: Gold
• Finish: Polished
• Item Shape: Hexagonal
• Fastener Type: Hex
• Screw Head Style: Flat
• Thread Size: M14
• Compatible Groove Diameter: 14 millimeters
• Grade Rating: Industrial
• Package Dimensions: 8 x 6 x 4 inches
• Weight: 0.54 pounds
• UPC: 808282258887

Fitment

Suzuki outboard motors.

Replaces (OEM)

• 57630-92E00
• 57630-94300

Frequently Asked Questions

What is included in the Sierra 18-3777 Prop Nut Kit? The kit contains four pieces: a prop nut, a cotter pin, a washer, and a spacer, giving you everything needed to mount a propeller on a compatible Suzuki outboard in one purchase.

Will the 18-3777 kit fit my Suzuki outboard? This kit is built for Suzuki outboard motors and cross-references directly to Suzuki OEM prop nut part numbers 57630-92E00 and 57630-94300.

What OEM part numbers does the Sierra 18-3777 replace? It replaces Suzuki OEM numbers 57630-92E00 and 57630-94300, so either of those original part numbers can be matched to this kit.

What material is the prop nut made from? The prop nut in kit 18-3777 is machined from metal with a polished gold finish, giving it corrosion resistance for saltwater and freshwater use.

What thread size does the 18-3777 prop nut use? The nut has an M14 thread size with a compatible groove diameter of 14 millimeters.

Is this a genuine Sierra part or an aftermarket copy? Sierra 18-3777 is a genuine Sierra-manufactured product engineered to meet or exceed the performance of the original equipment part it replaces, not a generic aftermarket copy.

How much does the prop nut kit weigh? The Sierra 18-3777 Prop Nut Kit weighs 0.54 pounds.

What shape and fastener type is the prop nut? The 18-3777 nut is hexagonal in shape and uses a hex fastener type with a flat screw head style.

How is the Sierra 18-3777 kit different from buying individual hardware pieces? Instead of sourcing a prop nut, cotter pin, washer, and spacer separately, the 18-3777 kit bundles all four matched components together in one package sized for Suzuki outboard applications.

Is the 18-3777 prop nut kit rated for industrial-grade durability? Yes, the kit carries an industrial grade rating, and Sierra builds it to withstand demanding marine environments and high horsepower outboard use.

What color and finish does the 18-3777 nut have? It has a gold color with a polished finish.