OMC Johnson Evinrude NEW OEM .020 Oversize Piston 377073 0377073 NOS 0810

Johnson / Evinrude OEM .020" Oversize Piston — Part Number 377073
Brand: Johnson / Evinrude / OMC | Condition: New Old Stock (NOS)

You are purchasing a genuine Johnson/Evinrude OEM .020" Oversize Piston, part number 377073 (also 0377073), for Johnson and Evinrude 2-stroke outboard engines. This factory-specification .020" oversize piston is used during engine rebuilds following cylinder bore resurfacing — engineered to exact OEM dimensions for this oversize specification to restore proper compression, smooth operation, and long engine life. The piston does not include rings, wrist pin, or pin clips unless otherwise noted. This is an authentic factory original part — never installed, never used.

Condition Details: This is a New Old Stock (NOS) part. The piston itself is in new, uninstalled condition. As is common with NOS inventory, the original packaging may show signs of age, including shelf wear, dust, or minor cosmetic blemishes on the bag or box. The part is new and fully functional.

⚠ Important: This is a .020" oversize piston — for use only in cylinders that have been bored .020" over standard. Always verify cylinder bore size, engine model, serial number, and horsepower before ordering.

Part Number / Supersede Information:

• Primary OEM Part Number: 377073 / 0377073
• This part number may have been superseded by an updated Johnson/Evinrude part number. We recommend verifying any current supersede numbers through your local dealer or the official BRP parts catalog prior to ordering.

Compatible Equipment: Johnson and Evinrude 2-stroke outboard motors — verify specific model year, horsepower, serial number, and bore size fitment through your local dealer or the official BRP parts catalog prior to ordering.

Why Choose OEM Parts? OEM parts are engineered and manufactured to exact factory tolerances, ensuring a precise fit, reliable performance, and long service life. Unlike aftermarket alternatives, OEM parts are designed specifically for your engine — no modifications, no guesswork.

Returns: We proudly offer hassle-free returns. If you are not completely satisfied with your purchase for any reason, simply open a return request through eBay within 30 days of purchase and we will take care of you promptly.

Thank you for choosing QBS Parts Inc! We truly appreciate your business. If you have any issues whatsoever with your order, please give us the opportunity to resolve it before leaving feedback — we are committed to making every transaction a great experience. Please verify fitment using your equipment's model and serial number before purchasing. Feel free to message us with any questions — we're here to help!

QBS Parts, Inc. — Gardena, CA