Hose Nipple – Fits Yamaha 25HP 40HP 50HP 100HP 115HP 130HP 140HP 150HP 175HP 200HP 220HP 225HP 250HP (Replaces 6E5-44391, 6E5-44391-00)

Product Details

This Hose Nipple is designed for Yamaha outboard motors ranging from 25HP to 300HP, including models LZ250, Z240, L140, L130, L150, LZ150, Z150, D150, Z175, L200, LZ200, Z200, L225, Z225, L250, Z250, Z300, LZ300, and various horsepower configurations (100, 115, 130, 140, 150, 175, 200, 220, 225, 250HP). Engineered as a direct replacement for the lower motor cover nipple, it ensures reliable hose connection across a broad range of Yamaha engine series.

This aftermarket component directly replaces Yamaha OEM part numbers 6E5-44391, 6E5-44391-00, and 6E5443910000.

• Direct bolt-on installation to lower motor cover
• Compatible with freshwater and saltwater applications
• Includes one hose nipple per package

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

OEM Part Number

6E5-44391, 6E5-44391-00

Application

Lower motor cover hose connection

Fitment Type

Direct replacement

Material

Marine-grade composite

Compatibility

Yamaha outboard motors 25HP–300HP

What's in the Box

• Hose Nipple × 1

Installation Notes

1. Disconnect battery and relieve any residual fuel pressure before beginning work.
2. Locate the hose nipple mounting point on the lower motor cover assembly.
3. Remove the old hose nipple by carefully loosening any retaining clips or fasteners.
4. Clean the mounting surface to ensure a secure seal and prevent debris contamination.
5. Position the new hose nipple and hand-tighten initially to confirm proper alignment.
6. Torque fasteners to manufacturer specifications if applicable, avoiding over-tightening.
7. Reconnect hoses and inspect all connections for secure fit.
8. Reconnect battery and perform a visual inspection for leaks during initial engine run.

Troubleshooting & FAQ

Which Yamaha models are confirmed to fit?

This hose nipple fits Yamaha outboard motors from 25HP to 300HP, including LZ250, Z240, L140, L130, L150, LZ150, Z150, D150, Z175, L200, LZ200, Z200, L225, Z225, L250, Z250, Z300, LZ300, and horsepower ratings of 100, 115, 130, 140, 150, 175, 200, 220, 225, and 250HP. Always cross-reference your engine's OEM part number to confirm compatibility.

How do I confirm this is the correct part for my engine?

Verify that your engine currently uses Yamaha part number 6E5-44391 or 6E5-44391-00. Check your service manual or examine the existing nipple for stamped part numbers. If your model and horsepower appear in the compatibility table and the OEM number matches, this is the correct replacement.

What are common signs this nipple needs replacement?

Visible cracking, fuel or coolant leaks around the hose connection, difficulty securing hoses, or corrosion on the nipple surface are typical indicators. If you notice drips or reduced system pressure, inspect the nipple and surrounding hoses immediately.

Can I install this myself or should I hire a technician?

Installation is straightforward for users with basic mechanical skills and proper tools. However, working near fuel and cooling systems requires care to avoid leaks or engine damage. If you are unfamiliar with outboard service procedures, professional installation is recommended.

Is any sealant or gasket required during installation?

Most hose nipples rely on O-rings or hose clamps for sealing. Consult your engine's service manual to determine if thread sealant or a gasket is specified. Use only marine-grade sealants compatible with fuel and coolant if required.

How often should this part be inspected or replaced?

Inspect hose connections and nipples during routine maintenance intervals—typically every season or every 100 hours of operation. Replace immediately if you observe cracks, leaks, or corrosion. Preventive replacement every 3–5 years can help avoid unexpected failures.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

• Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement, not an OEM component.
• Professional installation is recommended for safety and performance.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.