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Castle Nut
Yamaha Motors

Castle Nut 90171-18M04-00

Country of Origin:
Japan
Satisfaction rating
(21 Ratings)
Genuine OEM product
PartX Rating: Best
$16.79$20.99
You save 20%($4.20)
-20%
In stock
5+ in stock
Yamaha Motors logo
PartX Alternatives — This part: Best
Ratings provided by PartX™
ProductPriceRatingComment
Yamaha Motors 90171-18M04-00
Castle Nut
(viewing this product)
Genuine OEM product
$17.17$20.20
In stock
5+ in stock
Best
Factory OEM parts will always have a BEST rating unless there is substantial data to prove otherwise.
Factory OEM parts will always have a BEST rating unless there is substantial data to prove otherwise.
Recmar REC90171-18M04
NUT (REC90171-18M04)
Aftermarket product
$7.92$8.80
In stock
Only 4 remaining
Unknown
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
GLM Marine 21241
Prop Nut (21241)
Aftermarket product
$8.48$10.60
Cross Ship
Leaves in 3-5 days
Unknown
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
Parsun F115-04000024
SLOTTED NUT
Aftermarket product
$9.00
Cross Ship
Leaves in 3-5 days
Unknown
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
Peach Motors PM-90171-18M04-00
Nut, Propeller Castle
Aftermarket product
$16.85
Cross Ship
Leaves in 3-5 days
Unknown
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.
We are working hard to determine a rating based on all available information, including product and manufacturing specifications.

Product Description

Yamaha factory part. Search for more factory parts & parts diagrams.
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Product Questions 0

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21 Product Reviews

Very good experience! Got exactly what I needed in time. Customer service is friendly and helpful! Thank you all!

MIKALAI KANDALIN — Sep 12, 2026

Order online, each time everything has been in stock and sent out within 2 days. Great 👍.

Lawrence R Whitney — Sep 5, 2025

Information available on line was awesome. Staff was very supportive to add a missed item to the original shipment. Shipping was incredibly fast. Highly recommend and will continue to utilize as a primary resource

Wayne Parker — Apr 22, 2025

I was in the market for a new propeller for my 2013 Yamaha SHO, and I found a great price online at Crowley Marine. Having never purchased anything from Crowley previously, I called their shop and received expert advice and service from their parts & service team. I placed my order on February 27, and my new prop was delivered just one week later! Thank you, Crowley Marine!

Tim Miles — Mar 18, 2025

Parts Fitment

Please verify fitment before ordering.

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Supersession Chain

NameSKUSuperseding SKU
Castle NutViewing this product90171-18M04-00Current

Aftermarket Interchange

NameSKUPriceBrand
Prop Nut (21241)21241$8.48GLM Marine
SLOTTED NUTF115-04000024$9.00Parsun
Nut, Propeller CastlePM-90171-18M04-00$16.85Peach Motors
NUT (REC90171-18M04)REC90171-18M04$7.92Recmar