My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-2452 Upper Unit Assembly Marine Outboard

Manufacturer

Picture for manufacturer Sierra

Part Number

18-2452
13 reviews
Sale Price

$1,576.07

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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 18-2452 Upper Unit Assembly is a quality aftermarket replacement upper unit designed for compatible marine outboard engines. Sierra International is a leading manufacturer of marine replacement parts, offering dependable OEM-equivalent components for a wide range of outboard applications.

This upper unit assembly serves as a core drivetrain component, housing the driveshaft, water pump housing, and related internal components that connect the powerhead to the lower gearcase. Replacing a worn or damaged upper unit with a quality Sierra assembly helps restore proper engine function and cooling system performance.

Key Features:

  • OEM-equivalent replacement upper unit assembly
  • Engineered to Sierra's marine-grade quality standards
  • Designed for direct-fit installation on compatible outboard engines
  • Supports proper driveshaft alignment and cooling water passage
  • Manufactured by Sierra International, a trusted name in marine aftermarket parts

Sierra part number 18-2452 is intended for use on specific outboard engine applications. Always verify compatibility with your engine's model and serial number before installation.

So far so good

ill tell you when i get the product

Your site is kind of a pain to navigate, every thing else was good

Great price on my item. Order placed and shipped from manufacturer very quickly. Anxiously awaiting delivery.

Ordered a Dee Zee bed mat for my truck. Got it right away and it fits like a glove!!!

Easy to use site; and easily find products and product details.

Very, very good price on an item that I have been wanting for a very long time. I'll be sure to check here first when shopping for an item of interest! Thanks.

Easy mobile site. Chose 2nd day air. Would love if handling time was 1 business day. We shall see!

Great selection

By far the best price I found on a Bak flip bed cover! Shipped the next day, although I did have to call to get the tracking number. However, customer service was very nice and emailed me the tracking number immediately. I will do business here again!

good

Easy and effective searching tool

well so far

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