Your Cart

Sierra 18-0670 Powerhead Base Gasket for Johnson/Evinrude Outboards

Manufacturer

Sierra

Picture for manufacturer Sierra

Part Number

118-0670
9 reviews
05/02/2036 3:21 AM
Sale Price

$15.78

In Stock (10+)

delivery box

Usually delivered within 2 days

Add To Cart

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-0670 is a high-quality powerhead base gasket designed for Johnson and Evinrude outboard motors. This gasket creates a reliable seal between the powerhead and the exhaust housing, preventing water intrusion and exhaust leaks that can lead to engine damage.

Key Features:

  • Precision-cut to OEM specifications for proper fit and seal
  • Manufactured from durable composite materials resistant to heat and corrosion
  • Replaces Johnson/Evinrude OEM part number 0318670
  • Essential component for powerhead removal and reinstallation
  • Sierra part number 18-0670 (also listed as 118-0670)

Sierra Marine is known for producing reliable aftermarket parts that meet or exceed OEM standards. This gasket is a critical replacement part during powerhead service, lower unit repairs, or engine rebuilds. Always replace this gasket when separating the powerhead from the midsection to ensure a proper seal and prevent costly water damage to the engine.

Ordering was easy. Got what I ordered at a fair price. Used the chat function to get an ETA on my package and they helped me quick and were responsive.

Awesome to work with. No delays. Product was perfect.

First off, the shipping was very quick! The battery was packaged very well. So, far so good. Just installed it in my SUV last night. Perfect fit! Thanks THMotorsports!

Very easy to search, locate, and order.

It was great! Good price, fast shipping.

Easy transaction, good price and delivery.

Great price and experience

Very easy and good to shop with

very good

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy