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Sierra 18-3106 Marine Water Pump Coupler for Volvo Penta Stern Drives

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3106
13 reviews
Sale Price

$17.31

4 left at this price

delivery box

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 18-3106 Water Pump Coupler is a premium aftermarket replacement cooling system component engineered for Volvo Penta inboard/outboard stern drive engines. Designed to restore proper water pump function, this coupler connects the drive shaft to the water pump impeller and is a critical component in maintaining engine cooling system performance.

Key Features:

  • Direct replacement for Volvo Penta OEM part numbers 806256-4 and 831009-6
  • Also interchangeable with GLM 12840
  • Meets or exceeds original equipment manufacturer (OEM) specifications
  • Built to withstand harsh marine environments
  • Backed by Sierra's limited lifetime warranty against defects in workmanship and materials
  • Sold individually — one coupler per package

Compatible Engine Models:

  • Volvo Penta AQ 90, 95, 100, 110, 115, 120A, 130, 145, 151, MB3B, 17C, and D series stern drives
  • Volvo Penta inboard/outboard engines rated 10–170 HP (1965–1993)

Sierra is a trusted name in marine aftermarket parts, offering premium-quality replacements across more than 6,000 marine components. The 18-3106 is an easy, cost-effective way to service your Volvo Penta water pump without sourcing expensive OEM parts.

Very easy to look for parts.

Simple and easy purchase

Easy and great prices, Thanks!

Very high level of responsive customer service, wow! And the items arrived immediately, so fast I thought there might be a mistake. :D<br>thx Sean!

Had then part I needed for a great price!

Ok so far

First time shop here. I will find out how the product is going ot be. The processing is so easy.

Wow! Super fast delivery, excellent communication, will definitely do business with again.

So far so good. No description about which brake pads were for the front and which were for the back though. I haven't had a chance to install these yet but shipping was fast.

The item I bought was a great price! The delivery time was excellent and I got exactly what I paid for!

PARTS WERE CHEAPER THAN MOST

Easy.....

Your website is a little clunky, but your prices are worth it :D The parts showed up on time and well packaged. I was a little freaked because I googled Autoplicity after I placed my order and saw some bad reviews online. My experience was fantastic. Keep

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