• 430331 Mercury MerCruiser 27430331 Gasket | Genuine Quicksilver OEM Part
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430331 Mercury MerCruiser 27430331 Gasket | Genuine Quicksilver OEM Part

430331 Mercury MerCruiser 27430331 Gasket | Genuine Quicksilver OEM Part

$13.18 AUD
$13.18 AUD
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide

🔧 Product Description

Genuine Quicksilver Gear Housing / Water Pump Base Gasket - Part Number: 27-430331

A genuine Quicksilver gear housing gasket used on selected MerCruiser Alpha One Gen II sterndrives and a wide range of Mercury / Mariner outboard water pump base and gear housing applications. This gasket seals the water pump base / gear housing joint to help maintain correct cooling water pressure.

⚙️ Key Features

  • Genuine Quicksilver OEM gear housing gasket
  • Correct Mercury part number 27-430331
  • Used on MerCruiser Alpha One Gen II and selected Mercury / Mariner outboards
  • Suitable for water pump base and gear housing sealing applications
  • Helps prevent water pressure loss and lower-unit cooling system leaks

🚤 Compatibility

Commonly used on

  • MerCruiser Alpha One Gen II water pump / gear housing gasket applications
  • Mercury / Mariner outboard water pump base gasket applications

Typically suits

  • Drive / engine models:
  • MerCruiser Alpha One Gen II sterndrive - serial 0D469859 and up
  • Mercury / Mariner 40HP - 60HP 4-Stroke BigFoot outboards
  • Mercury / Mariner 60HP 3-cylinder BigFoot outboards
  • Mercury / Mariner 75HP - 115HP 2-stroke outboards - USA serial 0A996142 and up
  • Mercury / Mariner 75HP - 115HP 2-stroke outboards - Belgium serial 9483121 and up
  • Mercury / Mariner 75HP EFI 4-Stroke outboards
  • Mercury / Mariner 80HP EFI 4-Stroke outboards
  • Mercury / Mariner 90HP EFI 4-Stroke outboards
  • Mercury / Mariner 100HP EFI 4-Stroke outboards
  • Mercury / Mariner 115HP EFI 4-Stroke outboards
  • Mercury / Mariner 150HP EFI 4-Stroke outboards
  • Mercury V-200 3.0L DFI outboard applications
  • Mercury / Mariner V-225 3.0L outboard applications
  • Mercury / Mariner V-250 3.0L outboard applications
  • Mercury Verado 135HP applications
  • Mercury Verado 150HP applications
  • Mercury Verado 175HP applications
  • Mercury Verado 200HP applications
  • Mercury Verado 225HP applications
  • Mercury Verado 250HP applications
  • Mercury Verado 275HP applications
  • Mercury Verado 300HP applications
  • HP Range: 40HP - 300HP where specified
  • Engine / Drive Type: MerCruiser Alpha One Gen II sterndrive and Mercury / Mariner outboard
  • System Type: Water pump base / gear housing gasket

🔌 Function

The gasket seals the water pump base and gear housing joint so the pump can build correct cooling water pressure without leakage at the base.

⚠️ Common Signs of Failure

  • Weak tell-tale or reduced water pressure
  • Water leakage at the water pump base
  • Engine overheating after pump service
  • Gasket tearing during pump disassembly
  • Poor cooling performance despite a new impeller

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 27-430331 current OEM service reference

OEM / Related Numbers

  • 27-430331
  • 430331
  • 27430331
  • 27-43033-1
  • 43033
  • 19234-ZW1-003 related cross-reference
  • 9-60020 related cross-reference
  • 30090 related cross-reference

Aftermarket / Verified Equivalents

  • Mallory: 9-60020
  • No additional aftermarket equivalent

📦 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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