Water Pump Impeller Kit for Yamaha 40 50HP (1984–1996) 6H4-W0078-00

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller Kit
$36.00
$36.00
Subtotal: $36.00

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Water Pump Impeller Kit for Yamaha 40 50HP (1984–1996) 6H4-W0078-00 JLM Marine

Water Pump Impeller Kit for Yamaha 40 50HP (1984–1996) 6H4-W0078-00

$36.00

Water Pump Impeller Kit for Yamaha 40 50HP (1984–1996) 6H4-W0078-00

$36.00

Product Details:

  • Yamaha OEM Part Numbers: 6H4-W0078-00-00, 6H4-W0078-01-00, 6H4-W0078-A0-00
  • Sierra OEM Part Number: 18-3429

Compatible Models:

Yamaha

2-Stroke Engines

  • 40HP: All models (1984–1994)
  • 50HP:
  • Standard models (1984–1987)
  • Pro Series 50 (1987–1990)
  • P50 Series (1995–1996)

Technical Specifications:

  • Impeller Material: Neoprene (heat-resistant, flexible)
  • Hardware Material: Stainless steel bolts (corrosion-resistant)
  • Gaskets: Non-asbestos fiber (OEM-compliant)
  • Blade Count: 6 (assumed based on Yamaha standards)
  • Hub Type: Plastic (assumed from context)

Additional Information:

  • Critical Notes:
  • Verify engine model code (e.g., Pro Series 50 vs. P50) and production year before purchase.
  • Lubricate seals and gaskets during installation (silicone grease recommended – not included).
  • Designed exclusively for 2-stroke engines.

Package Contents:

  • Impeller & Housing Components:
  • 1 × Water Pump Impeller (6H4-44352-00)
  • 1 × Insert Cup (663-44322-00)
  • 1 × Wear Plate (663-44323-00)
  • Seals & Gaskets:
  • 1 × Gasket (663-44315-A0)
  • 1 × Gasket (663-44316-A0)
  • 1 × Gasket (663-44324-A0)
  • 1 × Grommet (663-44366-00)
  • Hardware:
  • 2 × Bolts (97080-08045)
  • 2 × Bolts (97080-08055)
  • 1 × Woodruff Key (90280-03024)

Key Features:

  • Complete Rebuild Kit: Contains all gaskets, seals, and hardware for full water pump servicing.
  • Wide Compatibility: Covers 40HP/50HP Yamaha 2-stroke models from 1984–1996, including Pro Series and P50 variants.
  • Durable Construction: Neoprene impeller and stainless steel hardware ensure longevity in marine environments.
  • OEM Precision: Direct replacement for Yamaha 6H4-W0078 series and Sierra 18-3429 part numbers.

 

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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