My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-2666 Upper Unit Seal Kit for OMC Stringer Sterndrive

Manufacturer

Picture for manufacturer Sierra

Part Number

18-2666
13 reviews
Sale Price

$75.46

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 18-2666 is a replacement upper unit seal kit designed for OMC Stringer inboard/outboard sterndrive systems. This kit directly replaces OEM part number 981799 and is also interchangeable with GLM part number 87651, making it a versatile aftermarket solution for maintaining your OMC Stringer upper gearcase.

Sierra International is a trusted name in marine aftermarket parts, and this seal kit is engineered to meet or exceed the original manufacturer's specifications, helping to prevent fluid leaks and protect the upper gearcase from water intrusion and premature wear.

Key Features:

  • Direct replacement for OMC OEM part number 981799
  • Cross-references with GLM 87651
  • Designed for OMC Stringer 100–245 upper units (1968–1972)
  • Meets or exceeds OEM specifications for a reliable, long-lasting seal
  • Backed by Sierra's limited lifetime warranty
  • Premium quality construction for extended service life

OEM Cross-Reference Numbers: OMC 981799 | GLM 87651 | Sierra 18-2666

This upper unit seal kit is an essential maintenance component for keeping your OMC Stringer sterndrive operating correctly. Replacing worn seals at regular service intervals helps prevent costly gearcase damage and fluid contamination.

good price

East to order

it was good

The order was easy and shipment was fast.They had what i was looking for at a great price.

Good

Great price, easy to follow menu. I look forward to a speedy delivery!

Sorting through part numbers is a bit of a pain - better organization would be great.

I wish there something that told me an estimate of when the item leaves the warehouse

it's so easy I am in the for first time using to buy online because I know speak and read good English but it's so easy to buy it thank you have a great day

Order arrived quickly and was exactly as described. Great prices and service!

Quick,easy,just the way every company should be. Thank you!

Autoplicity has great customer service, great communication along with fast shipping! When I called with a question about my order I didn't have to wait forever on the phone and the representative was very helpful. I'll definitely be ordering from autoplicity again.

Best Price i could find for some nice foglamps. easily navigable website.

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