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Sierra 18-3003 Water Pump Impeller for OMC Replaces 377178

Manufacturer

Sierra

Picture for manufacturer Sierra

Part Number

18-3003
11 reviews
03/13/2036 2:28 AM
Sale Price

$16.66

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3003 is a premium replacement water pump impeller designed for OMC (Outboard Marine Corporation) stern drive and inboard marine engines. This impeller directly replaces OMC part number 377178, ensuring proper fit and reliable cooling system performance.

Key Features:

  • Direct replacement for OMC part number 377178
  • Precision-molded neoprene construction for durability and flexibility
  • Maintains optimal water flow through the engine cooling system
  • Designed to meet or exceed OEM specifications
  • Easy installation with proper impeller tool

Regular impeller replacement is critical for preventing engine overheating and maintaining reliable marine engine operation. Sierra's impellers are manufactured to strict quality standards, making them a trusted choice for marine mechanics and boat owners. This impeller is compatible with various OMC Cobra stern drive models from the 1980s and 1990s.

Note: Impellers should be inspected annually and replaced every 2-3 years or per manufacturer recommendations, even if they appear intact, as neoprene can deteriorate over time.

Great price

Quick and easy

The shipping was fast and the customer service was great. I accidentally hit submit twice, and they promptly cancelled my accidental order. If you have any problems, just call!

Great pricing; easy to order.

Great website, fast and easy!

Easy checkout process.

So far good.

Prices are very good. There was a slight issue with my order, but it was taken care of after being passed around to a few different departments when I called. Would order from them again.

Good service & communication with Sales Rep Keith Baldwin, Not so much the other guy I spoke with though. Great pricing and easy to navigate website.

Thanks

Great price,quick and easy process.

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