• 6H3-11181-A1 Yamaha Gasket Cover | Genuine OEM Yamaha Outboard Part
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6H3-11181-A1 Yamaha Gasket Cover | Genuine OEM Yamaha Outboard Part

6H3-11181-A1 Yamaha Gasket Cover | Genuine OEM Yamaha Outboard Part

$43.99 AUD
$43.99 AUD
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🔧 Product Description

Genuine Yamaha Cylinder Head Gasket - Part Number: 6H3-11181-A1

A genuine Yamaha cylinder-head gasket for selected 50HP, 60HP and 70HP three-cylinder two-stroke outboards.

The gasket seals combustion pressure, cooling-water passages and the cylinder-head joint between the head and cylinder block.

⚙️ Key Features

  • Genuine Yamaha OEM cylinder-head gasket
  • Correct Yamaha part number 6H3-11181-A1
  • Earlier service version superseded by 6H3-11181-A2
  • Used on Yamaha three-cylinder 50HP to 70HP two-strokes
  • Sierra, Recmar and WSM-style replacements available

🚤 Compatibility

Commonly used on

  • Yamaha three-cylinder two-stroke cylinder heads

Typically suits

  • Engine models:
  • Yamaha 25B applications using the 6H3 cylinder block
  • Yamaha 50G
  • Yamaha 60F
  • Yamaha E60H Enduro
  • Yamaha C60
  • Yamaha 70B
  • Yamaha 70C
  • Yamaha 60TL and 70TL three-cylinder models
  • HP Range: Commonly 50HP - 70HP, plus selected 25B applications
  • Engine Type: Yamaha three-cylinder carburetted two-stroke outboard
  • Year Range: Approximately 1984 - 2019, dependent on cylinder-head revision

🔌 Function

The gasket seals the combustion chambers and separates cylinder pressure from the engine cooling passages.

⚠️ Common Signs of Failure

  • Low or uneven compression
  • Cooling water enters a cylinder
  • Combustion gases pressurise the cooling system
  • Water or staining appears around the cylinder-head joint
  • Engine overheats or misfires after warm-up

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 6H3-11181-A2 → Supersedes 6H3-11181-A1
  • 6H3-11181-A1 → Supersedes 6H3-11181-A0
  • 6H3-11181-A0 → Supersedes 6H3-11181-01
  • 6H3-11181-01 → Supersedes 6H3-11181-00
  • 6H3-11181-00 earlier Yamaha cylinder-head gasket reference

OEM / Related Numbers

  • 6H3-11181-A1
  • 6H3-11181-A1-00
  • 6H311181A100
  • 6H3-11181-A2
  • 6H3-11181-A0
  • 6H3-11181-01
  • 6H3-11181-00
  • 6H3-11193-A1 related head-cover gasket

Aftermarket / Verified Equivalents

  • Sierra: 18-3831
  • Recmar: REC6H3-11181-A2
  • YiheoZux: 6H3-11181 replacement gasket
  • Asaki: 6H3-11181-A0 / A1 / A2
  • Direct aftermarket head gasket: 6H3-11181-A2

📦 Condition

  • Genuine Yamaha 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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