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🛠️ Seal the deal with precision and durability—never let a leak slow your adventure!
The Sierra 18-2945-9 Marine Drain Screw Gasket pack includes two stainless steel gaskets designed for 3/8-16 drain/fill screws used in MerCruiser, Mercury/Mariner outboards, and most lower units and sea water pumps. Engineered for a precise fit and corrosion resistance, these gaskets meet or exceed OEM standards, ensuring reliable, leak-free performance in demanding marine environments.
| ASIN | B000N9M48O |
| Best Sellers Rank | #908,247 in Automotive ( See Top 100 in Automotive ) #1,979 in Powersports Engine Gaskets |
| Brand | Sierra |
| Color | Original Version |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,260) |
| Date First Available | February 6, 2007 |
| Exterior Finish | Machined |
| Fastener Size | 3/8-16 |
| Global Trade Identification Number | 00808282164324 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.16 ounces |
| Item dimensions L x W x H | 4 x 4 x 1 inches |
| Item model number | 18-2945-9 |
| Manufacturer | Sierra |
| Manufacturer Part Number | 18-2945-9 |
| Material | Stainless Steel |
| Metal Type | Stainless Steel |
| Model | SR18.2945.9 |
| Number of Pieces | 2 |
| OEM Part Number | 307552 |
| Outside Diameter | 4 Inches |
| Product Dimensions | 4 x 4 x 1 inches |
| Size | 4 inches |
| UPC | 808282164324 |
| Washer Type | Fender |
S**N
Did the job
These replacement gaskets for my outboard are easy to install and work great
R**.
Perfect fit
Drain screw gaskets were a perfect fit. Good price as well!
J**E
Oil Drain Gasket
Perfect replacement for worn oil drain gasket. No more water intrusion to my lower end gear box.
R**G
Works great on older Mercury Outboards.
Changed the lower unit gear oil on my 2002 Mercury 115 Hp outboard--seals worked/great. Easy to replace, but hard to find. It is amazing how many places sell the lower unit gear oil, but not the drain seals. Received quickly--needed three of them, so I had to buy two packages; thought it was expensive for what you got.
T**Y
More than I expected, literally!
These fit perfectly on my Mercury 40hp outboard! Says pack of 2 but I got like a bunch, 4 or 5 packs of 2! No complaints here, good to go for a few seasons of oil changes!
R**8
They work
Not much else to say. No leaks.
A**R
Sierra International 18-2945-9 Marine Drain
Unlike one review, I received a package of two as was advertised. I hoped to receive a few more considering I payed over $5.00 for two very small washers. I should have gone to my local boat dealer and payed fifty cents each. Live and learn!
T**R
Looks like a good replacement part
Looks like a good replacement part. I won’t use them until I winterize in the fall.
L**L
TRES SATISFAIT
M**K
I bought these as spares to have on hand. Arrived in good shape.
A**R
The price point for product is expensive.
C**R
Worked great as replacement washers when swapping out my outboard gear oil on a 3.5hp Mercury (Tohatsu) outboard 4-cycle motor. Only thing is they have a bit more play than the snug on the bolt originals.
A**U
All parts needed are there , did the job as expected
Trustpilot
2 weeks ago
2 weeks ago