Sierra 18-3327 Water Pump Kit w/Housing
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Within 30 days
Sierra 18-3327 Water Pump Kit w/Housing Product Description
Upgrade Your Outboard's Cooling System with Confidence
Keeping your outboard motor running cool under pressure is non-negotiable, especially during those long days on the water. This complete water pump kit delivers everything you need to restore peak performance to your engine's cooling system. Designed as a direct-fit replacement, it tackles common issues like impeller wear, housing cracks, and seal failures that lead to overheating and costly downtime.
What sets this kit apart? It's not just a patch—it's a full rebuild solution that matches original equipment specifications for seamless integration. Boat owners rave about the reliability, noting fewer breakdowns and smoother operation after installation. Whether you're prepping for fishing season or routine maintenance, this kit ensures your motor stays protected against the elements.
Everything You Need in One Kit
This thoughtfully assembled kit includes high-quality components precision-engineered for durability:
- Impeller (O.E.# 386084): Flexible rubber construction grips water efficiently for maximum flow.
- Housing (O.E.# 435390): Robust casting resists corrosion from saltwater exposure.
- Wear Plate (O.E.# 318995): Protects against abrasion, extending overall pump life.
- Water Pump Cup (O.E.# 324097): Seals tightly to prevent leaks.
- Grommets (O.E.# 302497 & 327035): Vibration-dampening seals for quiet, stable operation.
- Oil Seal (O.E.# 318972): Keeps lubricants in and contaminants out.
- O-Rings (O.E.# 303097 & 319085): Precision-fit for leak-proof assembly.
- Pin (O.E.# 300771): Ensures secure alignment during install.
- Stainless Steel Bolts (O.E.# 3191126, qty 4): Rust-resistant fasteners for long-term holding power.
No hunting for missing parts or settling for generics—this kit has it all, saving you time and frustration.
Perfect Fit for Popular Outboard Engines
Engineered for compatibility with select two-cylinder OMC/Johnson/Evinrude models in the 65-125 HP range (typically 1981-1987), this kit bolts on without modifications. Always cross-reference your engine serial number for exact fitment to avoid surprises. Users report it revives cooling efficiency on V4 and inline models prone to pump wear from prolonged idling or debris buildup.
Key Benefits for Boaters
- Prevents Overheating: Fresh impeller and seals restore full water flow, critical for high-RPM runs.
- Cost-Effective Reliability: OEM-equivalent quality at a fraction of dealer prices, with materials built to withstand harsh marine environments.
- Easy DIY Install: Most swaps take under an hour with basic tools—remove lower unit, swap components, and reassemble.
- Extended Engine Life: Proper cooling reduces stress on pistons, heads, and exhaust components.
Pro Tips for Long-Lasting Performance
To get the most from your new pump kit, inspect it annually or every 100 hours of use. Watch for signs of trouble like steam from the tell-tale, reduced water stream, or unusual engine temps. Flush with fresh water after saltwater use, and store your boat with the impeller dried out to prevent cracking.
Pro hack: During install, apply a thin layer of marine grease to the impeller vanes for easier future removal. Pair this kit with a fresh lower unit gasket set for a complete refresh that feels factory-new.
Frequently Asked Questions
What engines is this water pump kit compatible with?
This kit fits select OMC/Johnson/Evinrude two-cylinder engines in the 65-125 HP range, commonly from 1981-1987 models. Verify your engine's serial number and original equipment numbers for precise compatibility.
Does the kit include the housing and all seals?
Yes, it includes the full housing (O.E.# 435390), impeller, wear plate, multiple O-rings, grommets, oil seal, pin, and stainless steel bolts—everything for a complete rebuild.
How do I know if my water pump needs replacing?
Look for weak water flow from the tell-tale, engine overheating, visible impeller chunks in the strainer, or milky oil from seal failure. Annual checks prevent bigger issues.
Is installation difficult for a beginner?
It's straightforward for DIYers with basic tools. Drop the lower unit, remove the old pump, install new parts, and torque to spec. Service manuals provide step-by-step guidance.
Can I use this kit in saltwater environments?
Absolutely—the stainless steel bolts and corrosion-resistant housing make it ideal for both fresh and saltwater use. Regular flushing extends its life significantly.
What's the difference between this and a basic impeller kit?
This is a comprehensive kit with housing, wear plate, and all seals, addressing multiple failure points. Basic impeller kits leave you replacing worn housings later.
How often should I replace the impeller?
Replace every 1-2 years or 100 hours, especially if unused for months. Rubber degrades from dry rot, even without runtime.
Housing O.E.# 435390
Wear Plate O.E.# 318995
Water Pump Cup O.E.# 324097
Grommet O.E.# 302497
Grommet O.E.# 327035
Oil Seal O.E.# 318972 O-Ring O.E.# 303097
O-Ring O.E.# 319085
Pin O.E.# 300771
Stainless Steel Bolt O.E.# 3191126 (4)
Save $5 when you buy the Sierra 18-3327 Water Pump Kit w/Housing for only $39 from NVN Marine! Same day shipping before 3pm.
Sierra 18-3327 Water Pump Kit w/Housing Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Sierra Engine Parts |
| Weight: |
0.42 lb |
| Replaces: |
OMC 394711, 386697, 391698 |
Sierra 18-3327 Water Pump Kit w/Housing User Reviews
Sierra 18-3327 Water Pump Kit w/Housing Shipping & Return
| Shipping Weight: |
0.42 lb |
|---|---|
| Box Sizes: |
2.00 (h) x 4.00 (w) x 4.00 (l) |
| Cubic Feet: |
32.0 |
| Returnable: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.