WSM Gasket Kit, Powerhead Mercury 150 / 175 Hp 6 Cyl 76-'91, 500-226, 27-11338A8

WSM Gasket Kit, Powerhead Mercury 150 / 175 Hp 6 Cyl 76-'91, 500-226, 27-11338A8

Marsoni

M251S

$139.19

Get it in 3 business days with 1 day shipping. Friday, May 29

WSM Gasket Kit, Powerhead Mercury 150 / 175 Hp 6 Cyl 76-'91, 500-226, 27-11338A8Item#: 500 226 Gasket Kit, Powerhead Mercury 150 175 Hp 6 Cyl 76 91 OEM#: 27 11338A88 Brand: WSM FITMENTS: Make Model Year(s) Mercury 6 Cyl 3. 125 Bore 2L 175 1976 1981 Mercury 6 Cyl 3. 375 Bore 2. 4L 175 1981 1982 Mercury 6 Cyl 3. 375 Chrome Bore 2. 4L 175 1983 1990 Mercury 6 Cyl 3. 375 Steel Bore 2. 4L XR 4 150 1988 1991 Mercury 6 Cyl 3. 501 Bore 2. 5L EFI 175 1989 1990 Note: XR4

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I noticed the engine running much quieter using this oil. The pour mouth is pretty unique for this brand, you can just open the interior cap, pull up the accordion neck and pour into the engine which provides better control over traditional wide mouth, thus less messy. This oil rarely goes on sale and is typically 1.5x to 2x more expensive than the more common US brands.

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Reviewed in the United States on August 28, 2025

Verified Purchase

Cooch

Bozeman, US

★★★★★ 5

Best synthetic oil BMW

Excellent synthetic oil BMW 328I

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Reviewed in the United States on February 6, 2026

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Malu buys everything

Waukegan, US

★★★★★ 5

Last long

Love it ! Since I have a BMW this oil it’s good for it . The Price is good . Last long . No engine noise Or oil burning. Even the color looks good after 3 months.

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Reviewed in the United States on March 9, 2026

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Brian Classen

Whiting, US

★★★★★ 5

FRIENDLY REMINDER Don't overtighten the bolts

MUCH better than the cheap plastic OEM part, Just a reminder though, these thread into an aluminum block so be very careful to start them finger tight first, then evenly tighten both bolts to push the fitting into the chamber. If you don't, it will slightly misalign and you run the risk of stripping the threads. The one comes with the replacement o ring, and be sure to get some antifreeze on that seal prior to attempting to push it into the chamber. IT IS A TIGHT FIT, but that's what you want, so just be careful. You might also want an extra hose clamp on hand, as the one that came with this began to bend as it got tight, so I had to replace it for peace of mind. Overall, great product though.

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Reviewed in the United States on January 9, 2026

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Dklnyc

West Palm Beach, US

★★★★★ 5

Strong product

Great quality

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Reviewed in the United States on March 11, 2026