6H3-14992 Screw Drain for Yamaha C40 CV40 90ETLK 90ETLF 90ETLDA 90TJRZ 90TLRZ C85TLRU C85TLRP C75TLRT B90TLRX C90TLRV | JLM Marine

6H3-14992 Screw Drain for Yamaha Outboard 2-Stroke 40-90 HP Engines

This carburetor drain screw is designed to fit Yamaha 2-stroke outboard engines ranging from 40 HP to 90 HP across multiple model series and production years. Engineered as a direct replacement for OEM part number 6H3-14992-00-00, this drain screw ensures reliable carburetor maintenance and fuel system servicing on compatible C, CV, E, P, and B series models from the mid-1980s through the late 2000s.

Whether you're servicing carburetors on standard tiller models, electric start configurations, or precision-blend oil injection systems, this drain screw provides the precise fit required for leak-free operation. It supports routine carburetor bowl draining, seasonal maintenance, and fuel system winterization across a wide range of Yamaha outboard platforms.

• OEM Equivalent: Direct replacement for Yamaha 6H3-14992-00-00
• Application: Carburetor drain function for fuel system maintenance
• Compatibility: Fits Yamaha 2-stroke outboards from 40 HP to 90 HP (1984-2008)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 × Carburetor Drain Screw (6H3-14992)

Installation Guide

1. Turn off the fuel supply and disconnect the battery to ensure safe working conditions. Allow the engine to cool completely before beginning work.
2. Locate the carburetor bowl drain screw on the lower portion of the carburetor assembly. Position a suitable container beneath the carburetor to catch draining fuel.
3. Using the appropriate screwdriver, carefully remove the old drain screw by turning counterclockwise. Inspect the threads in the carburetor body for damage or debris.
4. Clean the threaded hole in the carburetor body with a lint-free cloth. Ensure no contaminants are present that could cause leaks.
5. Install the new drain screw by hand-threading it clockwise into the carburetor body. Avoid cross-threading by ensuring the screw engages smoothly from the start.
6. Tighten the drain screw gently to the manufacturer's torque specification using the appropriate tool. Do not over-tighten, as this may damage the threads or the screw gasket.
7. Reconnect the fuel supply and battery, then start the engine. Inspect the drain screw area for any fuel leaks while the engine is running at idle.
8. If leaks are detected, shut down the engine immediately and verify proper screw installation and torque. Recheck thread condition and gasket seating if necessary.

Troubleshooting & FAQ

How do I confirm this drain screw fits my Yamaha engine?
Cross-reference your engine's model number and year with the compatibility table above. You can also verify the OEM part number 6H3-14992-00-00 in your engine's parts diagram or service manual to ensure correct fitment.

What are the signs that my carburetor drain screw needs replacement?
Common indicators include fuel leaking from the carburetor bowl, difficulty draining fuel during maintenance, visible corrosion or thread damage on the screw, or a stripped or cracked screw head that prevents proper tightening.

How often should I inspect or replace the drain screw?
Inspect the drain screw during routine carburetor maintenance or seasonal winterization (typically every 100 hours of operation or annually). Replace it immediately if you observe leaks, corrosion, or thread damage to prevent fuel system issues.

Can I use this drain screw during winterization to drain the carburetor?
Yes, this drain screw is designed to facilitate fuel drainage from the carburetor bowl. Simply open the screw to allow fuel to drain completely before storing your outboard for the off-season, then retighten securely afterward.

What is the difference between this aftermarket screw and the OEM version?
This aftermarket drain screw is manufactured to OEM specifications (6H3-14992-00-00) using equivalent materials and tolerances. It provides the same fit and function as the original Yamaha part at a more competitive price point.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.