Mercruiser / Mercury / Mariner Lower Unit Bearing Assembly 135-400 HP 447-312

Mercruiser / Mercury / Mariner Lower Unit Bearing Assembly 135-400 HP 447-312

Marsoni

M251S

$36.97

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

Mercruiser / Mercury / Mariner Lower Unit Bearing Assembly 135-400 HP 447-312ITEM#: 447 312 LOWER UNIT BEARING ASSEMBLY: MERCURY MARINER MERCRUISER 135 400 HP OEM#: 31 48939A2, 31 8M0146553, 48939, 48939A2, 8M0146553 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 2014 Mercury 6 Cyl 2. 5L XS 200 2001 2006 Mercury 6 Cyl 3. 2283 Bore Verado 350 2009 2014 Mercury 6 Cyl

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Our puppy loves this ball. It has held up well so far, it’s about 2 weeks now of large breed pup play. It’s been outside for the last week, rain or shine, still in working order. Not as big as I thought it would be though. No squeak, bounces well. Thick rubber like material, that can be depressed when biting down.

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Reviewed in the United States on May 14, 2026

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AnaC

Lake Worth, US

★★★★★ 5

Great Quality and durability

Color: Ultra, Size: Large

I have a teething puppy and this is the only ball that has outlasted the rest!! Big chewer and still bounces and no tears! Keeps him entertained for hours!! Sturdy, solid, good quality and value!

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Reviewed in the United States on February 12, 2026

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Dana Kurtz

Cuba, US

★★★★★ 5

Durable, even for a Great Dane!

Color: Ultra, Size: XXL

I've bought many tennis ball sized ChuckIt balls in the past (for medium sized dogs we've owned), so when we knew we were going to be babysitting our daughter's Great Dane, I bought a bigger one for her. The 4" is perfect for her! She plays catch with it, but also likes to gnaw on it. It holds up great!

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Reviewed in the United States on April 19, 2026

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Ol' Hippie

Lowell, US

★★★★★ 5

Another great product from Chuckit!

Color: Ultra, Size: XL

Exactly the high quality that I've come to expect from Chuckit! The plastic/rubber used in their products is extremely tough yet gives enough that it's hard to actually pierce the it and tear apart. We have had Chuckit! Sticks and Balls with launcher for years and love them all. This particular ball is pretty big so my 45 pound pit mix struggles to pick it up but that's part of the fun for him. My 85 pound pit mix can pick it up no problem. The only "complaint" is that the two of them have been having so much fun with their new ball, they have already knocked something over and broke it. 😁

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Reviewed in the United States on March 26, 2026

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Cristy L. Spencer

Fort Morgan, US

★★★★★ 5

Perfect for my mid size pit bull

Color: Ultra, Size: XL

Updating my review, the ball only lasted 5 days. I left the 5 stars because we had enough fun those 5 days to be worth the small price. She has dog has a lot of jaw strength, so I’m not surprised We have a mid size foster pit bull. This ball is her favorite toy. It’s durable and the perfect size for her to play ball safely.

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Reviewed in the United States on February 22, 2026