WSM Lower Unit Seal Kit Mercury 20 Hp 77-79 - 18-2627, 26-66303A1

WSM Lower Unit Seal Kit Mercury 20 Hp 77-79 - 18-2627, 26-66303A1

Marsoni

M251S

$119.97

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

WSM Lower Unit Seal Kit Mercury 20 Hp 77-79 - 18-2627, 26-66303A1Item#: 18 2627 Lower Unit Seal Kit Mercury 20 Hp 77 79 OEM#: 26 66303A1 Brand: Sierra FITMENTS: Make Model Year(s) Mercury 2 Cyl 2. 565 Bore Cross Flow 20 1977 1979

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We offer a 30-day return/exchange service after receiving.
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These brackets are heavy duty and came with the correct hardware. They were easy to install, the two holes were so helpful to know where to mark them. I think because they’re heavy duty you can place a good amount of weight on your shelves. The only thing I wasn’t happy with is that 4/69 of shelves, the paint was chipping but it was the perfect gold color.

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Reviewed in the United States on February 14, 2026

Verified Purchase

Port

Pawtucket, US

★★★★★ 5

Really nice looking work great

Size: 4 Inch, Color: Black

Great looking

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Reviewed in the United States on May 8, 2026

Verified Purchase

Sharon

Boise, US

★★★★★ 5

Don't hesitate - Great product!

Size: 12 Inch, Color: Black

Superior quality at an unbelievable savings over local retailers. Hardware for hanging included the cheaper plastic lags yet they also included the heavy duty lags, so no tapping in to our supply. Thank you for a great product

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Reviewed in the United States on December 13, 2025