Water Pump Impeller – Fits Johnson/Evinrude 10-35 HP (Replaces 375638, 775518)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller
$15.99
$15.99
Subtotal: $15.99

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Water Pump Impeller – Fits Johnson/Evinrude 10 - 35 HP (Replaces 375638, 775518) - JLM Marine Boat Parts Limited

Water Pump Impeller – Fits Johnson/Evinrude 10-35 HP (Replaces 375638, 775518)

$15.99

Water Pump Impeller – Fits Johnson/Evinrude 10-35 HP (Replaces 375638, 775518)

$15.99

Water Pump Impeller – Fits Johnson/Evinrude 10-35 HP (Replaces 375638, 775518)

This water pump impeller is engineered for Johnson/Evinrude 10-35 HP 2-stroke outboard motors manufactured between 1949 and 1978. It features a durable brass hub and 6 precision-molded blades to ensure reliable performance and proper cooling system function.

This component serves as a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude 375638, 775518, and 777829, as well as Sierra 18-3002, GLM 89650, and Mallory 9-45215.

  • Designed for direct, hassle-free installation.
  • Constructed with a robust brass hub for enhanced durability.
  • Maintains proper engine temperature by restoring cooling system efficiency.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number Notes
Johnson/Evinrude 375638 / 0375638
Johnson/Evinrude 775518 / 0775518
Johnson/Evinrude 777829 / 0777829
Sierra 18-3002
GLM 89650
Mallory 9-45215
Mercury 802315 Cross-referenced by multiple sources but specific models not verified.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Johnson/Evinrude Various 10 2-Stroke 1949-1957 375638, 775518
Johnson/Evinrude Various 15 2-Stroke 1953-1965 375638, 775518
Johnson/Evinrude Various 18 2-Stroke 1953-1965, 1968-1970 375638, 775518
Johnson/Evinrude Various 20 2-Stroke 1966-1973 375638, 775518
Johnson/Evinrude Various 25 2-Stroke 1969-1978 375638, 775518
Johnson/Evinrude Various 30 2-Stroke 1970-1978 375638, 775518
Johnson/Evinrude Various 35 2-Stroke 1970-1978 375638, 775518
Mercury Various 802315 Cross-referenced by multiple sources but specific models not verified

Technical Specifications

Specification Value
Product Type Water Pump Impeller
Installation Direct Replacement
Housing Material Brass Hub
Housing Color Black
External Diameter 69.37mm (2.73")
Internal Shaft Diameter 12.68mm (0.5")
Height 13.08mm (0.515")
Number of Blades 6
Weight 42g (1.48oz)
Warranty Varies by seller (1 Year to Lifetime)

Package Contents

  • 1 x Water Pump Impeller (Replaces 375638/775518)

Explosion Diagram

Explosion Diagram

Installation Guide

  1. Disconnect Power: Disconnect the spark plug wires and the negative battery terminal for safety.
  2. Drain Gearcase: Place a drain pan under the lower unit and remove the drain/fill screws to empty the gear oil.
  3. Remove Lower Unit: Remove the bolts connecting the lower unit (gearcase) to the upper engine housing.
  4. Access Pump Housing: With the lower unit removed, locate and unbolt the water pump housing cover.
  5. Remove Old Impeller: Note the orientation of the old impeller blades before carefully sliding it off the driveshaft.
  6. Clean and Inspect: Thoroughly clean the inside of the pump housing and inspect it for scoring or corrosion. Replace if damaged.
  7. Install New Impeller: Lightly lubricate the new impeller and housing. Slide the new impeller onto the driveshaft while turning the shaft clockwise to bed the vanes correctly.
  8. Reassemble: Reinstall the pump housing, ensuring all seals and gaskets are correctly seated. Torque bolts to manufacturer specifications.
  9. Reattach Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, water tube, and shift shaft align. Securely fasten the bolts.
  10. Refill and Test: Refill the gearcase with fresh lubricant. Reconnect the battery and spark plug wires, and test the engine using a water source (flushing muffs) to confirm water flows from the telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Johnson/Evinrude engine?
A: First, check the "Compatible Engine Models" table to see if your engine's HP and year range are listed. Second, compare your existing part number to those in the "Part Number Cross-Reference" table. Matching the physical dimensions in the "Technical Specifications" provides a final confirmation.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating, a weak or intermittent water stream from the tell-tale outlet, or finding cracked, brittle, or broken blades during a visual inspection of the old impeller.

Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation. Service intervals should be shorter if the engine is used frequently in saltwater or sandy/silty conditions.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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