WSM Bearing, Lower Unit Mercury / Mariner / Mercruiser 105 - 400 Hp - 447-300

WSM Bearing, Lower Unit Mercury / Mariner / Mercruiser 105 - 400 Hp - 447-300

Marsoni

M251S

$49.97

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

WSM Bearing, Lower Unit Mercury / Mariner / Mercruiser 105 - 400 Hp - 447-300Item#: 447 300 Bearing, Lower Unit Mercury Mariner Mercruiser 105 400 Hp OEM#: 18 1143, 31 36387A1, 31 8M0146566, 8M0146566, 9 75107 Brand: WSM FITMENTS: Make Model Year(s) Mariner ALL Mercruiser ALL Mercury 4 Cyl 4 Stroke 135 2008 2009 Mercury 4 Cyl 4 Stroke 150 2008 2014 Mercury 4 Cyl 4 Stroke 175 2008 2014 Mercury 4 Cyl 4 Stroke 200 2008 2018 Mercury 6 Cyl 2. 5L XS 200 2001 2006 Mercury 6 Cyl 3. 125 Bore 2L 135 1986 2000 Mercury 6 Cyl 3. 125 Bore

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Exactly as described at a decent price. I've found over my decades of doing my own tune ups, the one thing you can't skimp on when tuning up your vehicle, plugs and its shows if you do. Out of the box, all 4 were gapped correctly. Ease of installation depends on your vehicle and ones mechanical ability with PATIENCE. 100% compatible with my vehicle, be sure to match you numbers. Overall 5 stars for performance and price.

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Reviewed in the United States on May 14, 2026

Verified Purchase

APTYP

Lowell, US

★★★★★ 5

💯% Authentic NGK Made in Japan.

Got these for my 2016 Subaru Crosstrek. You can't go wrong with NGK, these are 💯% AUTHENTIC, and made in Japan, unlike other NGK plugs that may be sold by other sellers which could be made in Thailand. The Subaru Crosstrek is running like a brand new vehicle after I put these puppies in it.

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Reviewed in the United States on December 23, 2025

Verified Purchase

Britton Home Improvement

Houston, US

★★★★★ 5

buy these!!

these are legit original NGK, superior plugs, will buy again

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Reviewed in the United States on May 4, 2026

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Anonymous User