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Sierra 18-3114 Marine Water Pump Impeller Insert Cup for Mercury & MerCruiser

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3114
13 reviews
Sale Price

$8.88

In Stock (6)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3114 Marine Insert Cup is a precision-engineered water pump impeller cup designed as a direct replacement for Mercury Marine and MerCruiser outboard and sterndrive cooling systems. This insert cup works in conjunction with the water pump impeller to maintain proper coolant flow and protect your engine from overheating.

Key Features:

  • Durable, non-corrosive construction engineered to withstand harsh marine environments
  • Designed for use with the 18-3116 water pump housing
  • Meets or exceeds OEM standards for reliable, long-lasting performance
  • Direct drop-in replacement — no modification required

OEM & Cross-Reference Part Numbers:

  • Mercury Marine: 48752, 48752T
  • GLM: 12810
  • Mallory: 9-43502

Sierra is a trusted name in aftermarket marine parts, offering premium-quality replacements across thousands of marine applications. The 18-3114 insert cup is a recommended service item whenever the water pump impeller is replaced, helping to ensure a complete and reliable cooling system repair.

So I left a review already about autoplicity and it was before I even checked when it was going to be delivered. I was happy to see it was already shipped but even more excited and pleased to see that it was only going to take two days to get here! Scheduled for delivery tomorrow! Could not be any happier with this company!

Thank you, it's a good day for buyers.

greaat price

fast and great pricing

fine so far

It was simple.

will let you know it gets to my house

Great and easy

Very good website. Easy to use. found the parts i needed and the order process was very easy since i could just login using my amazon account. Very convenient. Received my parts in a week.

......

best pricing for the item plus no tax and free ground shipping.better deal of all the online retailers

Good price

Easy order placement, fast shipment

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