6H3-44391 Nipple Nylon for Yamaha Parsun | JLM Marine

6H3-44391 Nipple Nylon for Yamaha Parsun Outboard Motors

This nylon hose nipple is designed to fit a wide range of Yamaha and Parsun outboard motors, from compact 9.9 HP models up to 115 HP engines across 2-stroke and 4-stroke platforms. Engineered for reliable coolant and fuel line connections, this aftermarket replacement ensures a secure, leak-free seal in marine environments.

Direct replacement for Yamaha OEM part numbers 6H3-44391, 6H3-44391-00, 6H3-44391-01, 6BL-44391-00, and Parsun F15-05000009. Compatible with dozens of engine series spanning multiple decades of production.

• Material: High-grade nylon for corrosion resistance and durability
• Fits both 2-stroke and 4-stroke Yamaha outboards (9.9–115 HP)
• Also compatible with Parsun F-series engines

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 × Nylon Hose Nipple (6H3-44391)

Package includes all parts shown in the product images.

Installation Guide

1. Shut off the engine and allow it to cool completely. Relieve any residual pressure in the fuel or cooling system.
2. Locate the old nipple on the hose connection point; note its orientation and any clamp positions. Take a photo if needed for reference.
3. Loosen the hose clamp(s) securing the hose to the old nipple using a screwdriver or pliers.
4. Gently twist and pull the hose off the old nipple; if it resists, apply mild heat or a penetrating lubricant to ease removal.
5. Inspect the hose end for cracks, hardening, or damage; replace the hose if necessary.
6. Clean the hose bore and the mating surface on the engine block or pump housing to remove debris and old sealant.
7. Slide the new nylon nipple into the hose end, ensuring it seats fully and aligns with the original orientation.
8. Reposition the hose clamp over the hose-nipple joint and tighten it securely, but do not overtighten and risk cracking the nylon.
9. Reconnect any additional fuel or coolant lines that were removed during access.
10. Start the engine and let it idle for a few minutes, monitoring the connection for leaks or seepage.
11. Check the clamp torque again after the first run and retighten if needed.
12. Dispose of the old part responsibly and record the replacement date in your maintenance log.

Troubleshooting & FAQ

How do I confirm this nipple fits my specific Yamaha or Parsun engine?
Cross-reference your engine model and serial number with the compatibility table above, or consult your factory service manual's parts diagram. If your engine model appears in the list and the part number matches, fitment is confirmed.

What are the signs that my hose nipple needs replacement?
Look for visible cracks, warping, or brittleness in the nylon body, coolant or fuel weeping around the connection, or difficulty achieving a seal even with new clamps. Any of these symptoms indicate it's time to replace the nipple.

Can I reuse the original hose clamps, or should I install new ones?
Inspect the clamps for corrosion, bent threads, or worn screw heads. If they show significant wear or have been over-torqued previously, replace them with new stainless-steel clamps to ensure a reliable seal.

How often should I replace this nylon nipple?
Nylon hose fittings typically last several years under normal conditions, but inspect them annually during routine maintenance. Replace immediately if you observe cracks, discoloration, or leaks, as degraded nylon can fail suddenly.

Is there a difference between this aftermarket nipple and the Yamaha OEM part?
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.