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⚓ Secure your ride with the ultimate prop nut kit—because every detail counts!
The Sierra 18-3733 Prop Nut Kit is a precision-machined, brass universal fit kit designed for SX Cobra and compatible watercraft. It includes a prop nut, keeper, cotter pin, and spacer, all engineered to meet or exceed OEM standards. With corrosion-resistant materials and a full warranty, this kit ensures reliable, long-lasting performance for marine propulsion systems.
| ASIN | B00144963S |
| Best Sellers Rank | #1,008,557 in Automotive ( See Top 100 in Automotive ) #2,357 in Wheel & Tire Lug Nuts |
| Brand | Sierra |
| Color | white |
| Customer Reviews | 4.5 4.5 out of 5 stars (138) |
| Date First Available | October 1, 2001 |
| Exterior Finish | Machined |
| Fastener Type | Prop Nut |
| Finish Type | Machined |
| Global Trade Identification Number | 00808282105624 |
| Inside Thread Size | M6 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.3 ounces |
| Item dimensions L x W x H | 6 x 1.25 x 7.12 inches |
| Item model number | 18-3733 |
| Lift Type | MOTOR |
| Manufacturer | Sierra |
| Manufacturer Part Number | SR18.3733 |
| Material | Brass |
| Metal Type | Brass |
| Model | Sierra 18-3733 Prop Nut Kit |
| Number of Pieces | 1 |
| Product Dimensions | 6 x 1.25 x 7.12 inches |
| Size | Onesize |
| Thread Class | Class 2A |
| Thread Coverage | Fully Threaded |
| Thread Size | M10 |
| Thread Style | Hexagonal |
| Thread Type | Right-hand |
| UPC | 808282105624 |
J**E
Perfect fit, nice quality.
I bought this set to replace my prop. Everything was a perfect fit, no issues. I bought a second set and zip tied it to my prop wrench in case I need to switch to my spare prop. Cheap piece of mind if you had to change out props in the water. you know your gonna drop something.....
J**F
Good quality
Item was good quality however did not fit my Volvo penta 5 Liter engine
B**R
Worked well
Part came as advertised, easy install, direct fit when I swapped out my aluminum propeller to a stainless steel propeller on a 2001 volvo penta 5.0 GL with SX cobra outdrive. I did find out that i needed a thicker thrust washer on the prop shaft for my stainless propeller to keep it from rubbing the outdrive housing, which is a completely different part than this.
E**N
Fits like factory.
Worked perfect for Volvo Penta SX-M
D**N
Everything needed to attach a prop
Good stuff!
C**S
Fits
Fits 2002 Glastron
R**W
Perfect.
Top quality and a perfect fit.
T**S
2010 Chaparral 4.3 Volvo Penta
Perfect fit
J**S
It’s a nut. With a spacer and cotter pin. And the retainer.
C**N
Worked Great.
K**S
Good quality and great to have as a spare in the boat in case you lose a prop.
S**H
👌☝️
B**Y
Perfect fit
Trustpilot
1 month ago
2 months ago