90790-BZ442-BT Yamalube 10W30 Outboard | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamalube 4C 10W-30 Four-Stroke Outboard Oil - Part Number: 90790-BZ442-BT

Genuine Yamalube mineral-based 10W-30 marine engine oil formulated for Yamaha four-stroke outboards.

The marine-specific formulation provides lubrication, corrosion protection, deposit control and shear stability during extended high-rpm operation.

⚙️ Key Features

• Genuine Yamalube four-stroke outboard oil
• Correct original Yamaha part number 90790-BZ442-BT
• SAE 10W-30 viscosity
• NMMA FC-W marine performance specification
• Four-litre package reference

🚤 Compatibility

Commonly used on

• Yamaha four-stroke outboard engines
• Routine engine-oil changes and service filling

Typically suits

• Engine types:
• Yamaha portable four-stroke outboards
• Yamaha mid-range inline-three and inline-four engines
• Yamaha F75 through F200 four-strokes
• Yamaha V6 four-stroke outboards where 10W-30 is specified for the operating climate
• Yamaha high-thrust four-strokes
• Yamaha VMAX SHO engines where the service manual permits 10W-30 FC-W oil
• Product Type: Mineral marine four-stroke engine oil
• Viscosity: SAE 10W-30
• Package Size: 4 litres
• Specification: NMMA FC-W.

🔌 Function

The oil lubricates bearings, pistons, camshafts and valve-train components while protecting internal surfaces against corrosion and deposits.

⚠️ Common Signs of Failure

Common signs engine oil requires replacement

• Oil is dark or contaminated
• Oil level rises from fuel dilution
• Low oil-pressure warning
• Engine noise increases
• Scheduled service interval has been reached

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 90790-BZ446-BT current related four-litre Yamalube 10W-30 package
• 90790-BZ442-BT earlier four-litre Yamalube 4C package reference

OEM / Related Numbers

• 90790-BZ442-BT
• 90790-BZ446-BT
• Yamalube 4C 10W-30
• Four-litre marine engine oil

Aftermarket / Verified Equivalents

• NMMA FC-W 10W-30 marine engine oil meeting Yamaha's specified requirement
• Quicksilver 10W-30 four-stroke marine oil
• Sierra 10W-30 FC-W marine engine oil

📦 Condition

• Genuine Yamaha product
• Brand new
• Supplied in original packaging