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Sierra 18-3906 Johnson/Evinrude Piston Ring Set .020 Over (OEM 396503)

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3906
14 reviews
Sale Price

$15.99

In Stock (6)

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Usually delivered within 2 days

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3906 is a .020" oversize piston ring set designed as a direct replacement for Johnson and Evinrude outboard engines. Cross-referencing OEM part number 396503, this ring set is engineered to restore proper compression and sealing in worn or rebuilt engine cylinders that have been bored .020" over standard size.

Key Features:

  • Designed for Johnson/Evinrude outboard engines
  • .020" oversize for use with bored cylinders
  • Direct replacement for OEM part number 396503
  • Manufactured by Sierra International, a trusted name in marine engine parts
  • Restores proper compression and reduces blow-by in rebuilt engines
  • Precision-engineered for accurate fitment and long service life

Sierra International has been producing high-quality marine replacement parts for decades, offering OEM-equivalent performance at a competitive price. This piston ring set is an essential component for any Johnson or Evinrude engine rebuild where cylinders have been bored to .020" over standard specification.

so far this has been an excellent experience... we will see how the shipping, arrival, accuracy and quality when the parts show up.

Fast,prompt service and delivery. Very pleased.

Awesome price! I couldn't find a better bargain anywhere, and I searched for days.

so far so good

Good

fast

Easy to order. Fast Shipping. Excellent packing. Overall great experience. Will do business again and recommend to others!

Everything went nice and smooth. Thanks.

so far so good

The best prices and fast shipping!

So far it is good, we received our order in great time. I haven't installed the muffler yet, but looks like it should be the right one. Thanks

I have searched the internet for the best pricing on auto accessories and ended up at Autoplicity. I tried everything to negotiate prices with some supplies and still got the best pricing usins Autoplicity without any hassles or delays. My invoice number 9314 shows that I got a great deal thanks to Autoplicity. I will be a returning customer for my future purchases.

Great pricing on almost every product! Quick process and fast shipping! Will definitely order from Autoplicity again in the future.

Quick and easy! Love the Amazon pay feature!

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