• 27997772 Mercury MerCruiser Rear Riser Open Gasket | Genuine Quicksilver OEM Part
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27997772 Mercury MerCruiser Rear Riser Open Gasket | Genuine Quicksilver OEM Part

27997772 Mercury MerCruiser Rear Riser Open Gasket | Genuine Quicksilver OEM Part

$17.20 AUD
$17.20 AUD
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🔧 Product Description

Genuine Quicksilver Rear Riser / Exhaust Elbow Open Gasket - Part Number: 27-997772

A genuine Quicksilver open-style rear riser / exhaust elbow gasket for selected MerCruiser standard cooling exhaust systems. This gasket seals the exhaust riser or elbow joint on older MerCruiser inline, 4-cylinder and V8 log-style exhaust applications.

⚙️ Key Features

  • Genuine Quicksilver OEM exhaust gasket
  • Correct Mercury part number 27-997772
  • Open-style rear riser / exhaust elbow gasket
  • Used on selected MerCruiser 120, 140, 165 L6, 470, 3.0LX and early V8 exhaust systems
  • Commonly supplied as a pair in aftermarket Sierra equivalent packs

🚤 Compatibility

Commonly used on

  • MerCruiser standard cooling rear riser / exhaust elbow applications
  • Older MerCruiser log-style manifold and riser systems

Typically suits

  • Engine models:
  • MerCruiser 120 MCM applications where 27-997772 is specified
  • MerCruiser 120 / 140, 1982-1995 rear riser gasket applications
  • MerCruiser 140 / 3.0L rear riser gasket applications
  • MerCruiser 3.0L / 3.0LX rear riser open gasket applications
  • MerCruiser 165 inline 6-cylinder rear riser applications
  • MerCruiser 470 3.7L, 1976-1982 rear riser applications
  • MerCruiser V8 5.0L / 5.7L early engines, 1982 and earlier
  • MerCruiser V8 5.0L / 5.7L, 1977-1982 log-style manifold applications
  • MerCruiser Ford V8 exhaust elbow applications where 27-997772 is specified
  • Engine Type: MerCruiser petrol sterndrive / inboard
  • System Type: Rear riser / exhaust elbow open gasket

🔌 Function

The gasket seals the exhaust riser / elbow joint while allowing correct exhaust and cooling water flow through the standard cooling exhaust system.

⚠️ Common Signs of Failure

  • Water leak at riser joint
  • Exhaust leak or fumes near manifold
  • Rust staining between riser and manifold
  • Overheating from restricted or leaking exhaust water passage
  • Gasket replacement required during riser removal

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 27-997772 current / later open gasket reference
  • 27-997772 supersedes / replaces earlier 27-997771 and 27-99777 family references where applicable

OEM / Related Numbers

  • 27-997772
  • 997772
  • 27997772
  • 27-997771
  • 997771
  • 27-99777
  • 99777
  • 27-99777B2
  • 27-52076

Aftermarket / Verified Equivalents

  • Sierra: 18-2833
  • Sierra: 18-2833-9
  • GLM: 31520
  • Mallory: 9-61407
  • Recmar: REC27-99777Q02

📦 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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