Sierra Prop Nut Kit 18-3716, Replaces OMC 175267, for Johnson/Evinrude Outboard Motors

The Sierra 18-3716 Prop Nut Kit is a three-piece hardware set for securing the propeller on Johnson/Evinrude outboard motors. It bundles the prop nut, cotter pin, and prop spacer needed for a complete prop nut replacement in one package, so there is no need to source each fastener separately. The kit is built from metal components with a machined finish and a #4 thread in a Unified National Coarse (UNC), right-hand thread pattern rated to an industrial grade standard.

This kit replaces OMC 175267 and is intended as a direct hardware replacement where that part number is called for. Each component in the kit corresponds to its own OEM number: the prop nut (Sierra 18-3705) replaces O.E. 314503, the cotter pin (Sierra 18-3742) replaces O.E. 314502, and the prop spacer (Sierra 18-4228) replaces O.E. 315810. Keeping these three parts matched as a set helps ensure the propeller is retained correctly and the cotter pin locks the nut in place as designed.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3716
• Product Name: Prop Nut Kit
• Kit Contents: Prop Nut (18-3705), Cotter Pin (18-3742), Prop Spacer (18-4228)
• Number of Pieces: 3
• Material: Metal
• Color: White
• Finish: Machined
• Thread Size: #4
• Thread Type: Unified National Coarse (UNC)
• Thread Class: Coarse
• Thread Style: Right Hand
• Screw Head Style: Hex
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.08 pounds
• UPC: 030999316370

Fitment

Designed for Johnson/Evinrude outboard motors.

Replaces (OEM)

• 175267

Frequently Asked Questions

What does the Sierra 18-3716 Prop Nut Kit include? The kit contains three parts: a prop nut (Sierra 18-3705), a cotter pin (Sierra 18-3742), and a prop spacer (Sierra 18-4228), giving you the complete hardware set needed to mount and secure a propeller.

What OEM part number does the 18-3716 kit replace? It replaces OMC 175267, so it is a direct swap wherever that OEM prop nut kit number is specified.

Is this prop nut kit made of metal? Yes, all three components in the Sierra 18-3716 kit are metal with a machined finish.

What thread size does the Sierra 18-3716 prop nut use? The nut uses a #4 thread in a Unified National Coarse (UNC), right-hand thread pattern with a coarse thread class.

What motors is the 18-3716 Prop Nut Kit designed for? This kit is designed for Johnson/Evinrude outboard motors.

How much does the Sierra 18-3716 kit weigh? The complete three-piece kit weighs 0.08 pounds.

Do I need to buy the prop nut, cotter pin, and spacer separately? No, Sierra part number 18-3716 bundles the prop nut, cotter pin, and prop spacer together as one kit, so all three pieces arrive in a single package.

What color is the Sierra 18-3716 Prop Nut Kit? The kit is white.

What are the individual OEM cross-reference numbers for the parts inside the kit? Within the 18-3716 kit, the prop nut (18-3705) replaces O.E. 314503, the cotter pin (18-3742) replaces O.E. 314502, and the prop spacer (18-4228) replaces O.E. 315810.

What size is the Sierra 18-3716 prop nut kit hardware? Each piece in the kit measures 0.39 x 0.39 x 0.39 inches.

Is the cotter pin included with the 18-3716 kit reusable? A new cotter pin (Sierra 18-3742) is included with every 18-3716 kit, so you have a fresh pin rather than needing to reuse the old one when replacing the prop nut assembly.

Does the Sierra 18-3716 kit come with installation instructions? The dossier for the Sierra 18-3716 Prop Nut Kit does not specify included instructions; the kit provides the prop nut, cotter pin, and prop spacer hardware only.