4th of JULY SALE - Save an Extra 10-50% Off!
Fantastic Savings Everywhere!

O-Ring - 18-7420-9 - Sierra

Sierra
Blowout
Save 54% Off.
O-Ring - 18-7420-9 - Sierra
Meltdown Sale Price: $3.59
Save: $4.34
(54% Off $7.93)
Part # 18-7420-9 ValueShip™ Eligible
Hurry! Only 1 left in stock
No Reviews | Write Review | Ask Question
This item is found in the following Product Families
Mariner O-Rings
Mariner O-Rings
GLM 82240 replacement parts
Mercruiser Generation II Sterndrive Water Pump Assembly Exploded View
Mercruiser Sterndrive Water Pump Assembly Exploded View Diagram and Parts Fits Generation II Figure # Description O.E.M. # Sierra # Qty. 1 Face Plate …
Dimensions ( in )
I.D. .862
Width .139

Replaces OEM part #
  • MERCURY MARINE 25-21836
  • MERCURY MARINE 25-25439
Ask a question for
Question & Answer Guidelines
This product ships in 1 business day.

Add to Cart and enter your Postal Code to determine the shipping charges and estimated delivery date.
* Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
Do you need Professional Installation? iboats.com has teamed with a national network of independent installers that are ready to handle your installation needs.
Find your local Amtech dealer:
Gear up for Summer Boating.
Extra 10-50% Savings during the 4th of July Sale!