90790-BZ445-BT Yamalube 10W30 1L Outboard | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamalube 4C 10W-30 Four-Stroke Outboard Oil 1L - Part Number: 90790-BZ445-BT

Genuine Yamalube mineral-based four-stroke marine engine oil supplied in a one-litre container.

The 10W-30 FC-W formulation is engineered for Yamaha outboard operating conditions, including sustained high engine speed, moisture exposure and long periods between use.

⚙️ Key Features

• Genuine Yamalube OEM four-stroke engine oil
• Correct Yamaha part number 90790-BZ445-BT
• SAE 10W-30 viscosity grade
• NMMA FC-W marine specification
• Supplied in a one-litre bottle

🚤 Compatibility

Commonly used on

• Yamaha four-stroke outboard engines
• Oil-level top-ups and scheduled engine-oil changes

Typically suits

• Engine types:
• Yamaha F2.5 through F25 portable four-strokes
• Yamaha F30 through F70 mid-range four-strokes
• Yamaha F75 through F130 inline-four engines
• Yamaha F150 through F200 four-strokes
• Yamaha V6 and VMAX SHO engines where SAE 10W-30 is approved
• Yamaha high-thrust four-stroke outboards
• Product Type: Mineral marine four-stroke engine oil
• Viscosity: SAE 10W-30
• Container Size: 1 litre
• Specification: NMMA FC-W.

🔌 Function

The oil lubricates and protects the engine's crankshaft, pistons, camshafts, bearings and valve train.

⚠️ Common Signs of Failure

• Oil level is below the dipstick mark
• Oil is dark or contaminated
• Low oil-pressure warning activates
• Engine noise increases
• Scheduled maintenance interval has been reached

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 90790-BZ445-BT current one-litre Yamalube 10W-30 package reference

OEM / Related Numbers

• 90790-BZ445-BT
• Yamalube 4C 10W-30
• One-litre four-stroke outboard oil
• 90790-BZ446-BT related four-litre package

Aftermarket / Verified Equivalents

• NMMA FC-W 10W-30 marine engine oil meeting Yamaha's required specification
• 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