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

🔄 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

🚤 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 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

📦 Condition

• Genuine Yamaha product

• Brand new

• Supplied in original packaging