Sierra 18-7759 Carburetor Repair Kit (Yamaha )

Restore Your Yamaha Outboard's Power with Precision

Nothing disrupts a day on the water like a sluggish Yamaha outboard engine bogging down from a faulty carburetor. Fuel delivery issues, rough idling, or hesitation under load often stem from worn diaphragms, clogged jets, or degraded gaskets. This carburetor repair kit steps in as your go-to solution, delivering fresh components to breathe new life into your 2-stroke powerhouse. Engineered for seamless compatibility, it tackles common wear points that plague marine environments—salt spray, ethanol-blended fuels, and constant vibration.

Crafted with high-grade materials like Viton for fuel resistance and precision-machined brass fittings, this kit ensures reliable sealing and flow. Boaters swear by it for quick fixes that match or exceed factory performance, getting you back to smooth acceleration without the hassle of sourcing individual parts.

Key Components for a Complete Rebuild

• Diaphragms: Flexible, ethanol-resistant membranes that maintain consistent fuel metering, preventing lean spots or flooding.
• Gaskets and O-rings: Custom-fit seals that eliminate vacuum leaks, a frequent culprit in hard starts.
• Needle and seat assemblies: Polished for optimal shutoff, ensuring precise fuel control even after prolonged storage.
• Float assemblies: Lightweight and durable, they keep fuel levels steady for reliable operation at all RPMs.
• Screens and jets: Fine-mesh filters and orifices to combat debris buildup from dirty tank water or old gas.

Every piece is individually inspected for quality, making this kit ideal for DIY mechanics or seasoned techs aiming to minimize downtime during peak boating season.

Perfect Fit for Popular Yamaha Models

Designed specifically for Yamaha 40HP to 70HP 2-stroke outboards from the mid-80s through the 2000s, this kit covers a wide range of carburetors including PT, PZ, and similar series. Verify your engine's carb model (often stamped on the body) for the best match—common applications include the 40TLRU, 50TLRU, 60TLRU, and 70TLRU variants. It supports both single and multi-carb setups, restoring that crisp throttle response Yamaha owners love.

"Swapped this in on my '92 60HP and it idles like new—night and day difference after fighting bogging all summer."

Why This Kit Outshines the Rest

In the world of aftermarket marine parts, reliability under harsh conditions separates the good from the great. This kit uses upgraded materials to fight modern fuel challenges like corrosion from E10 blends, extending service life beyond stock replacements. Save time with a complete package—no hunting for missing bits—and enjoy peace of mind from a brand trusted by marinas nationwide.

Proven Benefits

• Boosted Efficiency: Cleaner fuel atomization for better mileage and lower emissions.
• Quick ROI: Avoids costly full carb replacements while matching OEM specs.
• Easy Maintenance: Components designed for straightforward disassembly and reassembly.
• Weatherproof Durability: Resists UV, salt, and humidity for seasons of trouble-free use.

Step-by-Step Installation Tips

Reviving your carb doesn't require a shop lift. With basic tools—a carb cleaner spray, small screwdrivers, and compressed air—you can complete the job in under an hour per carb.

1. Disconnect fuel line and throttle linkage; drain float bowls.
2. Remove carb from manifold, noting gasket orientation.
3. Disassemble carefully, soaking in cleaner; inspect bores for wear.
4. Replace all soft parts first—diaphragms and gaskets—then seats and needles.
5. Reassemble with fresh bowls, sync floats, and bench-test for leaks.
6. Reinstall, prime, and fire up—adjust idle if needed.

Pro Tip: Always replace fuel lines and filters alongside for a total refresh. Run Sea Foam through the system post-install to clear residues.

Frequently Asked Questions