Sierra Engine Parts

Sierra 18-3202 Water Pump Kit - OMC

SKU: 4002607 · UPC: 030999315649 · MPN: 18-3202
4.7 · 0 reviews
Authorized dealer21% off
$25.49
$32.29Save $6.80
or 4 payments of $6.37 with Affirm
In stock — Ships today
SAME-DAY SHIPPING · 14:23 EST
Order in time, ships today
Ships from your nearest warehouse. UPS Ground 2–4 business days.
Free shipping
Orders $500 or more
Free returns
Within 30 days
Same day shipping
Order before 3 PM (EST)
Ask anything
We're here to help
$25.49
02 · Overview

Sierra 18-3202 Water Pump Kit - OMC — Product description

Keep your OMC outboard running cool and reliable with the Sierra 18-3202 Water Pump Kit, a trusted aftermarket solution designed for seamless performance on the water. Whether you're prepping for a weekend fishing trip or tackling longer offshore adventures, this kit ensures optimal cooling to prevent overheating and extend engine life. Boat enthusiasts know that a failing water pump can sideline your vessel fast—don't let that happen.

Precision Engineering for OMC Engines

Crafted with high-quality materials, the Sierra 18-3202 mirrors OEM specifications while delivering enhanced durability. The nitrile rubber impeller resists wear from sand, salt, and debris, common culprits in marine environments. Its neoprene housing provides superior flexibility and heat resistance, maintaining peak efficiency even under demanding conditions. This isn't just a replacement; it's an upgrade that boaters rely on for consistent water flow and pressure.

Complete Kit for Easy Rebuilds

  • High-performance impeller for maximum water pickup
  • Durable wear plate to protect against abrasion
  • Stainless steel fasteners for corrosion resistance
  • Gaskets and seals for leak-free assembly
  • Key shaft and housing components for full rebuild capability

Everything you need arrives in one package, saving time and hassle during servicing. No more hunting for individual parts—get back on the water quicker.

Perfect Fit for Popular OMC Models

This kit fits a wide range of OMC outboards, including many Johnson and Evinrude models from the 1980s through the early 2000s. Always cross-reference with your engine's serial number for the best match, but it's a go-to for 40-150 HP inline engines. Boaters upgrading from worn factory pumps report smoother operation and quieter runs, thanks to the balanced design that minimizes vibration.

Installation Made Straightforward

DIY-friendly with basic tools: Drain the gear case, remove the old pump housing, inspect the drive shaft, and assemble the new kit using the included instructions. Pro tip: Apply marine grease to the impeller splines for smooth engagement and longevity. Most installs take under an hour, but flush the cooling system afterward to clear any old debris. Regular checks every 100 hours of use keep it performing like new.

Why Choose Sierra 18-3202 Over Others?

Unlike generic kits that fail prematurely, Sierra's rigorous testing ensures reliability in real-world saltwater and freshwater use. It supports higher RPMs without cavitation, crucial for towing skiers or powering through choppy waves. Owners praise its value, noting fewer breakdowns and lower long-term costs compared to dealer parts. Invest in peace of mind for your prized outboard.

Maintenance Tips for Longevity

To maximize lifespan:

  1. Inspect annually or every season for impeller wear
  2. Winterize by removing and storing dry
  3. Monitor engine temp gauges closely
  4. Use ethanol-free fuel to avoid gumming

Pair with a fresh gear lube change for comprehensive lower unit care. This proactive approach keeps your OMC humming season after season.

What engines is the Sierra 18-3202 Water Pump Kit compatible with?

It's designed for various OMC outboards, particularly Johnson and Evinrude models in the 40-150 HP range from certain years. Verify with your engine serial number for exact fitment.

How often should I replace the water pump impeller?

Replace every 2-3 years or 200 hours of use, or sooner if you notice reduced cooling water flow from the tell-tale.

Does this kit include all necessary gaskets and seals?

Yes, it comes complete with gaskets, seals, impeller, wear plate, and hardware for a full rebuild without extras.

Can I install the Sierra 18-3202 myself?

Absolutely, with standard tools like screwdrivers and pliers. Follow a step-by-step guide; it's a common maintenance task for boat owners.

What are the signs of a failing water pump?

Overheating engine, weak stream from the tell-tale, unusual noises, or steam from the exhaust. Address promptly to avoid damage.

Is this kit suitable for saltwater use?

Yes, its corrosion-resistant materials make it ideal for both salt and fresh water environments.

How does Sierra compare to OEM parts?

Sierra meets or exceeds OEM standards at a fraction of the cost, with proven reliability among marine mechanics.

Water Pump Kit - OMC


SKU: NVN-4002607
MPN: 18-3202
UPC: 030999315649
03 · The numbers

Technical specifications

BrandSierra Engine Parts
ModelSierra 18-3202 Water Pump Kit - OMC
SKU / MFR#4002607

Set product metafields under specs.* to populate this table.

04 · Before you buy

Frequently asked questions

No questions yet. Got one? Drop us a line.

05 · Customer voices

Customer reviews