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home > Sierra 18-3312 3312 Yamaha Water Pump Repair Kit > Sierra 18-3312 3312 Yamaha Water Pump Repair Kit

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Sierra 18-3312 3312 Yamaha Water Pump Repair KitKeep your Yamaha outboard running cool under pressure with a reliable water pump rebuild that tackles the toughest marine conditions. Over time, the impeller in your Yamaha's water cooling system wears down from sand, debris, and constant use, leading to reduced flow, overheating risks, and potential engine damage. This repair kit steps in as your go to solution, delivering everything needed for a full refresh without the hassle of sourcing parts

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Why choose thelockerguy wholesale?

Keep your Yamaha outboard running cool under pressure with a reliable water pump rebuild that tackles the toughest marine conditions. Over time, the impeller in your Yamaha's water cooling system wears down from sand, debris, and constant use, leading to reduced flow, overheating risks, and potential engine damage. This repair kit steps in as your go-to solution, delivering everything needed for a full refresh without the hassle of sourcing parts piecemeal.

Boat owners swear by these kits for their straightforward rebuilds that restore prime pumping performance, ensuring consistent cooling on long fishing trips or high-speed runs. It's about more than just parts—it's peace of mind on the water.

Top Reasons This Kit Outshines Basic Fixes

Superior Durability: Neoprene impeller material resists cracking and swelling in saltwater environments, outlasting stock options in gritty conditions.
Complete Rebuild Ready: Includes impeller, housing gaskets, seals, and often a wear plate—everything for a drop-in upgrade that matches OEM tolerances.
Cost-Effective Maintenance: Skip dealer markups and full pump replacements; rebuild for a fraction of the cost while extending engine life.
Easy Weekend Project: No special tools required beyond basics like pliers and a screwdriver, perfect for DIYers who want pro results.
Proven Reliability: Trusted by mechanics for consistent water flow that prevents vapor lock and keeps temps steady even at wide-open throttle.

Fits a Wide Range of Yamaha Outboards

This kit aligns perfectly with popular Yamaha two-stroke powerheads from 40HP to 90HP models, covering mid-range workhorses used in everything from bay boats to offshore rigs. Common fits include 48, 50, 60, 70, 80, 85, 90HP variants—always cross-check your lower unit housing for the exact match to avoid fitment headaches.

Pro tip: Inspect your current pump housing for cracks or scoring during disassembly. A fresh kit pairs best with a clean housing for optimal impeller spin-up and flow rates.

Horsepower Range	Typical Models	Key Fit Notes
40-50 HP	40TLR, 48TLR	Compact lower units
60-70 HP	60TLRB, 70TLRB	Standard shaft lengths
80-90 HP	80TLRB, 90TLRB	High-output carbs

Step-by-Step Rebuild Guide for Confident Results

Prep Work: Tilt the motor, drain the lower unit gear lube, and remove the pump housing with a gentle twist—avoid forcing it to prevent gear damage.
Disassemble: Pry out the old impeller using needle-nose pliers. Note the rotation direction (usually clockwise) for reinstall.
Clean Thoroughly: Flush the housing with soapy water to remove grit; a worn plate here kills new impeller life fast.
Install New Components: Lube the impeller with waterproof grease, slide it in observing vanes-away-from-gear orientation, then layer on gaskets and seals.
Test Run: Prime the system by matting the impeller with a drill before full assembly. Flush with fresh water post-install to check flow.

Common pitfalls? Skipping lube causes binding, and ignoring keyway alignment leads to no prime. Take your time— a 30-minute job saves hours of towing.

Maximize Longevity with Smart Upkeep

After rebuild, flush after every saltwater outing to rinse salt buildup. Check water tell-tale stream for strong pressure at idle and WOT. Annual impeller swaps prevent surprise failures during peak season. Pair with fresh gear lube changes every 100 hours for holistic lower unit health.

"Swapped this in on my '92 70HP Yamaha—cooling flow doubled, no more hot spots on hot Texas days. Solid kit." — Experienced angler

Frequently Asked Questions

What models does the Sierra 18-3312 water pump repair kit fit?

It fits Yamaha two-stroke outboards in the 40-90HP range, including popular 48, 60, 70, 80, and 90HP models. Verify your lower unit housing for precise compatibility.

What's included in this Yamaha water pump rebuild kit?

Typically includes a high-quality neoprene impeller, gaskets, O-rings, seals, and wear plate for a complete overhaul.

How often should I replace the water pump impeller on my Yamaha?

Inspect annually or every 100 hours; replace if vanes are chipped, glazed, or swollen to avoid overheating.

Can I install this kit myself without special tools?

Yes, basic hand tools suffice. Follow a simple disassembly process, and use soapy water for cleaning—no marine mechanic needed.

Why is my Yamaha outboard overheating after a pump rebuild?

Common causes: Incorrect impeller orientation, debris in housing, or faulty thermostat. Double-check vane alignment and flush thoroughly.

Does this kit work for both freshwater and saltwater use?

Absolutely—durable materials handle both, but always flush saltwater residue to prolong life.

How do I know if my water pump needs rebuilding?

Signs include weak pee stream, steam from powerhead, rubber bits in tell-tale, or erratic temps. Proactive checks save engines.

Refer to Sierra's Catalog for more information

SKU: NVN-4002096
MPN: 18-3312
UPC: 030999753304

Sierra 18-3312 3312 Yamaha Water Pump Repair Kit

Name: Sierra 18-3312 3312 Yamaha Water Pump Repair Kit
Brand: bdelite
SKU: 57379919418
Price: 60.39 USD
Availability: InStock
Rating: 4.6471 (2242 reviews)