• 318M0146553 Mercury MerCruiser Bearing | Genuine Quicksilver OEM Part
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318M0146553 Mercury MerCruiser Bearing | Genuine Quicksilver OEM Part

318M0146553 Mercury MerCruiser Bearing | Genuine Quicksilver OEM Part

$30.40 AUD
$30.40 AUD
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🔧 Product Description

Genuine Quicksilver Bearing Assembly Cup/Cone - Part Number: 31-8M0146553

A genuine Quicksilver cup and cone bearing assembly used in selected Mercury V6, V8, V10, Verado, Pro XS, SeaPro and Racing outboard gear housing driveshaft assemblies. This bearing supports driveshaft rotation and gearcase loading in 4.80 Torpedo, 5.44 Torpedo, Torque Master and Sport Master gearcase applications where specified.

⚙️ Key Features

  • Genuine Quicksilver OEM bearing assembly
  • Correct Mercury part number 31-8M0146553
  • Cup / cone bearing assembly
  • Supersedes earlier 31-48939A2 bearing reference
  • Used in selected Mercury V6 / V8 / V10 high-output outboard gear housings

🚤 Compatibility

Commonly used on

  • Mercury V6 / V8 / V10 gear housing driveshaft bearing applications
  • Mercury Racing Torque Master, Sport Master and 5.44 Torpedo gear housings

Typically suits

  • Engine / gearcase models:
  • Mercury 175HP 3.4L V6 FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 175HP 3.4L V6 FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 175HP 3.4L V6 Pro XS FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 3.4L V6 FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 3.4L V6 FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 3.4L V6 SeaPro FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 3.4L V6 SeaPro FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 225HP 3.4L V6 FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 225HP 3.4L V6 FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 4.6L V8 Pro XS FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 4.6L V8 Pro XS FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 200HP 4.6L V8 Pro XS FourStroke, Torque Master gear housing - serial 2B529482 and up
  • Mercury 225HP 4.6L V8 Pro XS FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 225HP 4.6L V8 Pro XS FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 225HP 4.6L V8 Pro XS FourStroke, Torque Master gear housing - serial 2B529482 and up
  • Mercury 225HP 4.6L V8 SeaPro FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 Pro XS FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 Pro XS FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 Pro XS FourStroke, Torque Master gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 SeaPro FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250HP 4.6L V8 Verado FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 250R 4.6L V8 Racing, 5.44 Torpedo gear housing - serial 1E080500 and up
  • Mercury 250R 4.6L V8 Racing, Torque Master gear housing - serial 1E080500 and up
  • Mercury 300HP 4.6L V8 FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300HP 4.6L V8 Pro XS FourStroke, 4.80 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300HP 4.6L V8 Pro XS FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300HP 4.6L V8 SeaPro FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300HP 4.6L V8 Verado FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300HP 4.6L V8 Verado SeaPro FourStroke, 5.44 Torpedo gear housing - serial 2B529482 and up
  • Mercury 300R 4.6L V8 Racing, 5.44 Torpedo gear housing - serial 1E080500 and up
  • Mercury 300R 4.6L V8 Racing, Torque Master gear housing - serial 1E080500 and up
  • Mercury 300R 4.6L V8 AMS Racing, 5.44 Torpedo / 1.60 applications - serial 1E081459 and up
  • Mercury 400R 5.7L V10 Verado Racing, 5.44 Torpedo / 1.60 applications - serial 3B272954 and up
  • Mercury 450R 4.6L V8 Racing, 5.44 Torpedo / 1.60 applications - serial 1E083006 and up
  • HP Range: commonly 175HP - 450R where specified
  • Engine Type: Mercury V6 / V8 / V10 FourStroke, Verado, Pro XS, SeaPro and Racing outboard
  • System Type: Gear housing driveshaft cup / cone bearing assembly

🔌 Function

The bearing assembly supports the driveshaft and gear housing load, maintaining correct shaft alignment and smooth lower-unit operation.

⚠️ Common Signs of Failure

  • Gearcase growling or rumbling noise
  • Metal particles in gear oil
  • Excessive driveshaft movement
  • Failed pressure / bearing inspection during gearcase service
  • Bearing replacement required during lower-unit rebuild

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 31-8M0146553 → Supersedes 31-48939A2
  • 31-48939A2 earlier OEM bearing assembly reference

OEM / Related Numbers

  • 31-8M0146553
  • 8M0146553
  • 318M0146553
  • 31-48939A2
  • 48939A2
  • 31-8M0146566 related bearing assembly
  • 8M0142873 related bearing reference

Aftermarket / Verified Equivalents

  • No direct aftermarket equivalent preferred over OEM for Mercury high-output gearcase service

📦 Condition

  • Genuine Quicksilver part
  • Brand new
  • Supplied in original or equivalent packaging

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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