STD Piston Kit for Yamaha 4 HP 2-Stroke Outboards

Premium-quality aftermarket standard-size piston kit for selected Yamaha 4 HP 2-stroke 6E0 outboard engines.

Suitable for Yamaha 4A, 4AS, 4AC and 4ACMH models using the corresponding standard-size piston.

This kit can also be used on the equivalent Yamaha-manufactured Japanese Mariner 4 HP engines with 6E0 identification.

STD = Standard Size

Fits Yamaha Outboards

Fits selected:

Can also fit the equivalent Japanese Mariner 4 HP 2-stroke engines manufactured by Yamaha, identified by the 6E0 prefix.

It will NOT fit Mercury-manufactured Mercury / Mariner 4 HP engines.

OEM part numbers are used for identification and reference purposes only.

This is a STANDARD SIZE (STD) piston kit.

Before ordering, please make sure your engine still requires a standard-size piston and has not previously been rebored for an oversize piston.

Please do not order by 4 HP alone.

This kit is intended for the Yamaha 6E0 engine family.

Before purchasing, please check:

For Mariner applications, please make sure your engine is the Japanese Yamaha-manufactured 6E0 version.

If you are unsure, please send us a photograph of your engine identification plate before ordering.