• 8M0204714 Mercury MerCruiser 8M0204714 Thermostat Gasket | Genuine Quicksilver OEM Part
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8M0204714 Mercury MerCruiser 8M0204714 Thermostat Gasket | Genuine Quicksilver OEM Part

8M0204714 Mercury MerCruiser 8M0204714 Thermostat Gasket | Genuine Quicksilver OEM Part

$4.10 AUD
$4.10 AUD
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🔧 Product Description

Genuine Quicksilver Thermostat Gasket - Part Number: 27-8M0204714

A genuine Quicksilver thermostat gasket used in selected Mercury and Mariner outboard thermostat and cylinder head cooling-system assemblies. This gasket seals the thermostat or thermostat cover interface, helping maintain correct cooling water flow and temperature regulation.

⚙️ Key Features

  • Genuine Quicksilver OEM thermostat gasket
  • Correct Mercury part number 27-8M0204714
  • Cross-references with earlier 27-62386 and 27-62386001 gasket references
  • Used across selected 2-stroke, DFI / OptiMax, EFI and small outboard thermostat assemblies
  • Important replacement gasket during thermostat or cylinder head service

🚤 Compatibility

Commonly used on

  • Mercury / Mariner thermostat and thermostat cover gasket applications
  • Mercury DFI / OptiMax 1.5L and 2.5L cooling-system gasket assemblies

Typically suits

  • Engine models:
  • Mercury 15HP - serial 0T980000 to 0T999999
  • Mercury 15HP - serial 1B000001 and up
  • Mercury 15HP Marathon - serial 1B000001 and up
  • Mercury 15HP SeaPro - serial 1B000001 and up
  • Mercury 20 Jet - serial 1B000001 and up
  • Mercury 40 Jet - serial 0T980000 and up
  • Mercury 55HP 3-cylinder - serial 0T980000 and up
  • Mercury 75HP 3-cylinder - serial 0T980000 to 0T999999
  • Mercury 75HP 3-cylinder - serial 1B000001 and up
  • Mercury 80 Jet - serial 0T980000 to 0T999999
  • Mercury 80 Jet - serial 1B000001 and up
  • Mercury 90HP 3-cylinder - serial 0T980000 to 0T999999
  • Mercury 90HP 3-cylinder - serial 1B000001 and up
  • Mercury 75 DFI 1.5L 3-cylinder - serial 0T980000 to 1B226999
  • Mercury 75 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
  • Mercury 75 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885
  • Mercury 75 DFI 1.5L 3-cylinder - serial 1B736885 and up
  • Mercury 80 Jet DFI 1.5L 3-cylinder - serial 1B586067 to 1B736885
  • Mercury 80 Jet DFI 1.5L 3-cylinder - serial 1B736885 and up
  • Mercury 90 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999
  • Mercury 90 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
  • Mercury 90 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885
  • Mercury 90 DFI 1.5L 3-cylinder - serial 1B736885 and up
  • Mercury 115 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999
  • Mercury 115 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701
  • Mercury 115 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885
  • Mercury 115 DFI 1.5L 3-cylinder - serial 1B736885 and up
  • Mercury 115 Pro XS 1.5L 3-cylinder - serial 1B751825 and up
  • Mercury 125 DFI 1.5L 3-cylinder - serial 1B736885 and up
  • Mercury V-135 DFI 2.5L - serial 0T801000 to 1B226999
  • Mercury V-135 DFI 2.5L - serial 1B227000 to 1B417701
  • Mercury V-135 DFI 2.5L - serial 1B417702 and up
  • Mercury V-150 DFI 2.5L - serial 0T801000 to 1B226999
  • Mercury V-150 DFI 2.5L - serial 1B227000 to 1B417701
  • Mercury V-150 DFI 2.5L - serial 1B417702 and up
  • Mercury V-175 DFI 2.5L - serial 0T801000 to 1B226999
  • Mercury V-175 DFI 2.5L - serial 1B227000 to 1B417701
  • Mercury V-175 DFI 2.5L - serial 1B417702 and up
  • Mercury V-150 EFI 2.5L - serial 0T801000 to 1B226999
  • Mercury V-150 EFI 2.5L - serial 1B227000 and up
  • Mercury V-200 EFI 2.5L - serial 0T801000 to 1B226999
  • Mercury V-200 EFI 2.5L - serial 1B227000 and up
  • HP Range: broad outboard thermostat-family usage where specified by diagram
  • Engine Type: Mercury / Mariner 2-stroke, DFI / OptiMax and EFI outboard
  • System Type: Thermostat gasket / cooling system seal

🔌 Function

The thermostat gasket seals the thermostat housing or cover joint so the cooling system can regulate temperature without leakage or pressure loss.

⚠️ Common Signs of Failure

  • Water leakage around thermostat cover
  • Overheating from poor thermostat sealing
  • Salt build-up around housing joint
  • Torn gasket during thermostat service
  • Thermostat cover will not seal after removal

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 27-8M0204714 current OEM thermostat gasket reference
  • 27-8M0204714 → replaces / cross-references with 27-62386001
  • 27-62386001 → related to 27-62386 earlier thermostat gasket reference

OEM / Related Numbers

  • 27-8M0204714
  • 8M0204714
  • 278M0204714
  • 27-62386001
  • 27-62386
  • 27-62386B

Aftermarket / Verified Equivalents

  • Sierra: 18-0182
  • GLM: 30610

📦 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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