• 0305123 Evinrude Johnson O-Ring | Genuine OEM BRP Outboard Part
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0305123 Evinrude Johnson O-Ring | Genuine OEM BRP Outboard Part

0305123 Evinrude Johnson O-Ring | Genuine OEM BRP Outboard Part

$4.54 AUD
$4.54 AUD
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide

🔧 Product Description

Genuine BRP Crankcase Head and Bearing Carrier O-Ring - Part Number: 0305123

A genuine BRP large-diameter O-ring used to seal the crankcase head or propeller-shaft bearing carrier on selected Evinrude, Johnson and OMC outboards and sterndrives.

The O-ring has an approximate inside diameter of 3.780 inches and a cross-section of 0.135 inches. It prevents oil, gear lubricant or water passing around the outer diameter of the installed housing.

⚙️ Key Features

  • Genuine BRP OEM large-diameter O-ring
  • Correct OMC part number 0305123
  • Used on crankcase-head and bearing-carrier assemblies
  • Approximate 3.780-inch inside diameter
  • Cross-references with Sierra, GLM, Mallory and SEI numbers

🚤 Compatibility

Commonly used on

  • Evinrude and Johnson propeller-shaft bearing carriers
  • Evinrude and Johnson crankcase-head assemblies
  • OMC outboard and sterndrive housing applications using the 3.780-inch O-ring

Typically suits

  • Engine models:
  • Evinrude / Johnson 65HP outboards
  • Evinrude / Johnson 70HP outboards
  • Evinrude / Johnson 75HP outboards
  • Evinrude / Johnson 85HP V4 outboards
  • Evinrude / Johnson 90HP V4 outboards
  • Evinrude / Johnson 100HP outboards
  • Evinrude / Johnson 115HP V4 outboards
  • Evinrude / Johnson 120HP V4 outboards
  • Evinrude / Johnson 125HP outboards
  • Evinrude / Johnson 135HP V4 and V6 outboards
  • Evinrude / Johnson 140HP V4 outboards
  • Evinrude / Johnson 150HP V6 outboards
  • Evinrude / Johnson 175HP V6 outboards
  • Evinrude / Johnson 200HP V6 outboards
  • Evinrude / Johnson 225HP V6 outboards
  • Evinrude / Johnson 235HP V6 outboards
  • OMC sterndrive bearing-carrier or crankcase-head applications specifying 0305123
  • HP Range: Approximately 65HP - 235HP
  • Engine Type: Evinrude / Johnson V4 and V6 outboard; selected OMC sterndrive
  • Year Range: Approximately 1968 - 2006

🔌 Function

The O-ring seals the outside of the crankcase head or bearing carrier against its housing. In a gearcase it retains lubricant and prevents water entry; in a powerhead it prevents oil or crankcase leakage.

⚠️ Common Signs of Failure

  • Gear lubricant leaking around the bearing carrier
  • Milky or water-contaminated gear oil
  • Gearcase fails pressure or vacuum testing
  • Oil seepage around the crankcase head
  • O-ring flattened, pinched, hardened or cut
  • Corrosion beneath the bearing-carrier sealing surface

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 0305123 current OEM service reference
  • 0321119 related / interchangeable OMC reference
  • 0777380 related BRP service-pack reference

OEM / Related Numbers

  • 0305123
  • 305123
  • 0321119
  • 321119
  • 0777380
  • 777380

Aftermarket / Verified Equivalents

  • Sierra: 18-7133
  • Sierra: 18-7133-9
  • GLM: 82400
  • Mallory: 9-76529
  • SEI Marine: 95-306-04

📦 Condition

  • Genuine BRP 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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