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WSM Gasket, Block Cover Mercury / Mariner 90 - 150 Hp 6 Cyl - 18-2807-9

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WSM Gasket, Block Cover Mercury / Mariner 90 - 150 Hp 6 Cyl - 18-2807-9Item#: 18 2807 9 Gasket, Block Cover Mercury Mariner 90 150 Hp 6 Cyl OEM#: 18 2807, 27 98185, 27 981853 Brand: Sierra FITMENTS: Make Model Year(s) Mariner ALL Mercury 6 Cyl 2. 875 Bore Cross Flow 115 1970 1988 Mercury 6 Cyl 2. 875 Bore Cross Flow 135 1970 1971 Mercury 6 Cyl 2. 875 Bore Cross Flow 140 1978 1981 Mercury 6 Cyl 2. 875 Bore Cross Flow 150 1973 1978 Mercury 6 Cyl 2. 875 Bore Cross Flow 90 1978 1986 Mercury 6 Cyl 3. 125 Bore 2L 150 1979,1985
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4.4 ★★★★★
Based on 1809 reviews
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Product Reviews
D
Verified Purchase
Daniel Raymond
Bozeman, US
★★★★★ 5
It fits 09 ram, works great!
Style: CA9401
Works great on my 09 ram
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
M
Verified Purchase
michael underwood
Lowell, US
★★★★★ 5
Quality filter at a great price.
Style: CA9401
Great filter, very similar to K&N at a way cheaper price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
S
Verified Purchase
scAmazon ShoPPer
Lexington, US
★★★★★ 3
Fit perfectly, but questionably thin.
Style: CA11053A
This was an exact fit for my 2017 Kia Forte S. My only convern is that it is half the width of the stock filters. Hopefully the different material will make the difference over time. Didn't notice a loss or gain of torque or acceleration after swapping for my old dirty filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2025
C
Verified Purchase
Casey M
Alexandria, US
★★★★★ 5
Increased MPG!
Style: 33-3131
I don't know if it increases power, but it for sure has an increase of 1-2 MPG. About the same MPG increase as a K&N, but half the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
J
Verified Purchase
John K.
Natrona Heights, US
★★★★★ 4
Time will tell
Style: CA11053A
As another reviewer pointed out, the OEM paper filter is almost 3 times thicker than this one. All things equal, thicker would mean for filtering surface area. So with less filter media surface area, the filter would clog up quicker. However, since this is washable, maybe that's a moot point. I also noticed on my Hyundai Tucson, the rim of this filter must be slighter thicker because I had a tougher time clipping the filter box closed with this one installed. I am keeping my OEM for now, just in case.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2025

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