Yamaha Metal, Crank (-0.4) – YF1-52612-39-20

Precision Engine Component for Optimal Crankshaft Performance

Maintain peak engine performance with the Yamaha - METAL, CRANK (-0.4) - YF1-52612-39-20, a genuine Yamaha crankshaft bearing designed for engines requiring a -0.4 mm undersize. This crank bearing ensures the correct oil clearance, supporting proper lubrication and smooth crankshaft rotation during high-stress marine operation.

Crafted to Yamaha's OEM standards, this component delivers the durability and precision required for reliable engine rebuilds or maintenance. If your engine's crank journal has been machined undersize, this part provides the exact fit and support needed for safe, efficient performance.

Key Features

OEM Yamaha Quality: Designed to match factory specifications for a perfect fit and function.

-0.4 mm Undersize Bearing: Ideal for crankshafts that have been ground to an undersized diameter.

Enhanced Lubrication Support: Maintains critical oil clearance for reduced friction and engine wear.

Durable Construction: Made from high-strength materials to withstand heat and rotational forces.

Compatibility

Part Number: YF1-52612-39-20

Undersize Spec: (-0.4)

Engine Type: Confirm with your Yamaha engine service manual or technician to verify undersize crank requirements.

Ideal Use Cases

Engine Rebuilds After Crankshaft Grinding: For engines with journals ground 0.4 mm undersize.

Maintenance of Older Outboards: Restores bearing support to meet factory specs.

Precision Performance Tuning: Ensures longevity and smooth operation during high RPM use.

Why Bearing Size Accuracy Matters

Choosing the correct crankshaft bearing size is crucial for engine longevity. A misfit can lead to poor oil pressure, increased wear, and premature failure. The Yamaha - METAL, CRANK (-0.4) - YF1-52612-39-20 is designed for precise oil film support in undersized crank journal applications, helping your Yamaha engine run smoother and last longer.

Frequently Asked Questions

How do I know if I need a -0.4 mm crank bearing?

You’ll need a -0.4 bearing if your crankshaft journals have been machined to that undersize. This is typically confirmed during engine teardown or machining.

Is this an OEM part from Yamaha?

Yes, this is a genuine Yamaha replacement part, ensuring a reliable fit and long-lasting performance.

Can I install this bearing without professional tools?

It’s strongly recommended that crankshaft bearings be installed by a qualified marine technician to ensure proper alignment and clearance.

• Supersessions
  YF1-56942-39-20, YF1-56942-39-20