• Sea Water Pump Yanmar Johnson 128397-42500 - 1 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 2 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 3 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 4 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 5 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 6 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 7 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 8 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 9 - XRmarine
  • Sea Water Pump Yanmar Johnson 128397-42500 - 10 - XRmarine
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Sea Water Pump for Yanmar 128397-42500 Johnson 10-24509-01 w/ Bracket

Sea Water Pump for Yanmar 128397-42500 Johnson 10-24509-01 w/ Bracket

$154.99 USD
$154.99 USD
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Product Overview

Complete raw sea water pump assembly for Yanmar and Johnson marine diesel engines. Includes mounting bracket for easy installation. Designed for Yanmar 2GM, 3GM, 2YM, 3YM series and Johnson pump applications.

OEM Part Numbers

  • Yanmar: 128397-42500, 128377-42500
  • Johnson: 10-24509-01, 10-24509-02 (reduced cam), 10-13337-01, 10-13492-01
  • Johnson Pump: F4B-903, F4B-902 (reduced cam)

Compatible Engines

  • Yanmar 2GM, 3GM Series
  • Yanmar 2YM, 3YM Series

Package Includes

  • 1 x Raw Sea Water Pump Assembly
  • 1 x Mounting Bracket

Before You Buy

Please verify your engine model and pump type. Contact us for fitment confirmation.

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Boat Owners' Review

4.80 ★ (5)
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Before You Buy

Frequently Asked Questions

What is your refund policy?

We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.

See our full Refund Policy for complete details.

How does shipping work?

Free international shipping on every order — no minimums. We ship from our global warehouse network (US, Germany, UK, Australia). Typical delivery: 10-20 business days. Tracking included.

See our full Shipping Policy.

How do you keep prices fair?

We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.

Learn more on our About Us page.

What payment methods do you accept?

We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.