Yamaha Piston (Std) – 6BH-11631-00-B0

Genuine OEM Standard Piston for Reliable Yamaha Outboard Engine Performance

The Yamaha - Piston (Std) - 6BH-11631-00-B0 is a factory-original standard-size piston designed to deliver precise fit and high-performance reliability for Yamaha outboard engines. Whether you're replacing a worn component or completing a full engine rebuild, this part offers the accuracy, strength, and longevity expected from genuine Yamaha parts.

Built to exact OEM specs, this piston helps restore compression and maintain consistent combustion, supporting the performance and durability your Yamaha motor was engineered to deliver.

Key Features

Standard-Sized OEM Fit

Designed to match the factory bore size—ideal for direct replacement with no machining required.

Durable Construction

Engineered using Yamaha-approved materials for lasting performance in marine conditions.

Maintains Engine Balance

Supports proper crankshaft movement and optimal power output.

Compatibility

Part Number: 6BH-11631-00-B0

Compatible with select Yamaha outboard engine models.

Always confirm fitment using your engine’s service manual or official parts catalog.

Ideal Use Cases

OEM Replacements

Replace old or damaged pistons without modifying the cylinder bore.

Engine Maintenance

Helps maintain compression and combustion efficiency.

Performance Restoration

Restores smooth operation and reduces vibration or power loss in marine engines.

Why Use a Genuine Yamaha Piston?

Aftermarket parts often fail to meet the tight tolerances Yamaha outboards require. The Yamaha - Piston (Std) - 6BH-11631-00-B0 is precision-machined to maintain engine integrity and avoid uneven wear, poor fuel efficiency, or premature failure. It’s your best choice when rebuilding or repairing your engine for dependable results.

Frequently Asked Questions

Is this piston ready to install in a standard bore cylinder?

Yes, this is a standard-size piston and does not require cylinder reboring if your current bore is within factory spec.

How do I verify that this part fits my outboard engine?

Check your engine’s model number against Yamaha’s official parts catalog or consult your service manual.

Should I replace the piston rings along with the piston?

Absolutely. Installing new rings ensures proper compression and prevents blow-by or oil consumption.