Sierra 18-3419
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Within 30 days
Sierra 18-3419 Product Description
Upgrading or repairing your outboard motor's cooling system starts with a reliable foundation, and the Sierra 18-3419 water pump base delivers just that. Designed as a direct replacement for demanding marine environments, this base ensures optimal water flow to prevent overheating during long days on the water. Boat owners trust it for its precision engineering that matches OEM standards without the premium price tag.
What sets this apart? It's not just a part—it's built to handle the corrosive saltwater assaults and high-RPM vibrations that plague standard pumps. Whether you're prepping for offshore fishing trips or casual lake cruises, this base restores your engine's cooling efficiency, extending its lifespan and keeping you on the water longer.
Key Features and Benefits
- Precision Fit: Engineered to OEM specifications for seamless integration, eliminating guesswork during installation.
- Corrosion-Resistant Materials: Constructed from high-grade aluminum with protective coatings to withstand harsh marine conditions, far outlasting stock components in saltwater use.
- Enhanced Durability: Reinforced design reduces wear on impellers and seals, minimizing leaks and failures under pressure.
- Easy Maintenance Access: Simplified mounting points make routine inspections and rebuilds straightforward, saving time and frustration.
- Performance Optimized: Promotes consistent water pressure for better engine cooling, supporting peak horsepower without thermal throttling.
Real-world users report fewer breakdowns and smoother operation after swapping in this base, especially on older engines showing signs of impeller slippage or base erosion.
Perfect Compatibility for Popular Engines
This Sierra base aligns flawlessly with a range of Mercury outboards and compatible stern drives. It's the go-to replacement for models prone to water pump issues, ensuring you get back to boating without compatibility headaches.
Key cross-references include legacy part numbers that mechanics know well, making it a staple in boatyards nationwide. Always verify your engine's serial number for the best match, but its versatile design covers many vintage and modern setups.
Pro Tips for Installation and Longevity
- Prep Work: Drain the cooling system and inspect the housing for cracks—replace if needed to avoid future leaks.
- Clean Mating Surfaces: Use a non-abrasive cleaner to ensure a flat seal; residue is the enemy of watertight fits.
- Torque Correctly: Follow your engine manual's specs (typically 10-15 ft-lbs) to prevent warping or stripping.
- Pair with Quality Components: Combine with a fresh impeller kit and gasket for a complete overhaul that performs like new.
- Post-Install Test: Run the engine on muffs with a hose, checking for steady flow before hitting the water.
Many skippers do this job in under an hour with basic tools, turning a potential shop visit into a DIY win. Regular flushing after saltwater runs keeps it performing season after season.
Maintenance Essentials for Peak Performance
To maximize this base's reliability, integrate it into your annual service routine. Flush with a marine-safe solution after every brackish outing to combat salt buildup. Monitor for unusual engine temps via gauges—early detection keeps small issues from escalating.
Pro tip: Upgrade to a temperature-sensing impeller housing if your setup allows; it pairs perfectly for proactive cooling management on high-performance rigs.
Why Sierra Stands Out in Marine Parts
Sierra has earned its reputation through decades of supplying parts that boaters rely on. This 18-3419 exemplifies their commitment: rigorous testing in real marine scenarios, not just lab benches. It's the choice for those who demand affordability without sacrificing quality, backed by widespread use in marinas from Florida keys to Great Lakes ports.
Frequently Asked Questions
What engines is the Sierra 18-3419 water pump base compatible with?
It's a direct fit for many Mercury outboard models, cross-referencing OEM numbers like 46-42579A3 and 55-184. Check your engine's service manual for exact serial number matches.
Is this base suitable for saltwater use?
Absolutely—its corrosion-resistant construction handles saltwater exposure better than many OEM bases, making it ideal for coastal boaters.
Do I need special tools to install the Sierra 18-3419?
No, standard socket sets and torque wrench suffice. Most installs take 30-60 minutes for experienced DIYers.
How often should I replace the water pump base?
Every 3-5 years or at the first sign of impeller wear, leaks, or erosion—whichever comes first, especially in harsh conditions.
Can this base improve engine cooling?
Yes, by providing a solid, leak-free foundation, it ensures consistent water flow, reducing overheating risks during extended runs.
What's included with the Sierra 18-3419?
The base itself, ready for mounting with your existing or new impeller and housing components.
Does Sierra offer a warranty on this part?
Sierra parts come with manufacturer backing for defects—details vary by retailer, so confirm at purchase.
Save $8 when you buy the Sierra 18-3419 for only $24 from NVN Marine! Same day shipping before 3pm.
Sierra 18-3419 Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Sierra Engine Parts |
| Weight: |
0.21 lb |
Sierra 18-3419 User Reviews
Sierra 18-3419 Shipping & Return
| Shipping Weight: |
0.21 lb |
|---|---|
| Box Sizes: |
1.00 (h) x 6.00 (w) x 7.00 (l) |
| Cubic Feet: |
42.0 |
| Returnable: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.