27879855001 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part
27879855001 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part
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🔧 Product Description
Genuine Quicksilver Cylinder Block / Crankcase Gasket - Part Number: 27-879855001
Genuine Quicksilver gasket used on Mercury 1.5L 3-cylinder DFI / OptiMax powerhead assemblies. This gasket is used with 75HP, 80 Jet, 90HP, 115HP, 115 Pro XS and 125HP DFI engines where the cylinder block or crankcase diagram specifies 27-879855001.
⚙️ Key Features
- Genuine Quicksilver OEM gasket
- Correct Mercury part number 27-879855001
- Used on Mercury 1.5L DFI / OptiMax block assemblies
- Commonly serviced with M10 block studs and crankcase hardware
- Direct replacement gasket for supported 75HP to 125HP DFI powerheads
🚤 Compatibility
Commonly used on
- Mercury 1.5L 3-cylinder DFI / OptiMax cylinder block assemblies
- Mercury 75HP to 125HP DFI crankcase service
- Powerhead service where gasket 27-879855001 is specified
Typically suits
- Engine models:
- 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 1B736884
- Mercury 75 DFI 1.5L 3-cylinder - serial 1B736885 and up
- Mercury 80 Jet DFI 1.5L - serial 1B586067 to 1B736884
- Mercury 80 Jet DFI 1.5L - serial 1B736885 and up
- Mercury 90 DFI 1.5L - serial 0T801000 to 1B226999
- Mercury 90 DFI 1.5L - serial 1B227000 to 1B417701
- Mercury 90 DFI 1.5L - serial 1B417702 to 1B736884
- Mercury 90 DFI 1.5L - serial 1B736885 and up
- Mercury 115 DFI 1.5L - serial 0T801000 to 1B226999
- Mercury 115 DFI 1.5L - serial 1B227000 to 1B417701
- Mercury 115 DFI 1.5L - serial 1B417702 to 1B736884
- Mercury 115 DFI 1.5L - serial 1B736885 and up
- Mercury 115 Pro XS 1.5L - serial 1B751825 and up
- Mercury 125 DFI 1.5L - serial 1B736885 and up
- HP Range: 75HP - 125HP where specified
- Engine Type: Mercury 1.5L 3-cylinder DFI / OptiMax outboard
- System Type: Cylinder block / crankcase gasket
🔌 Function
The gasket seals the specified block or crankcase joint to maintain internal sealing and prevent leakage between the mating surfaces.
⚠️ Common Signs of Failure
- Gasket disturbed during powerhead teardown
- Oil or residue around crankcase joint
- Poor sealing after block service
- Gasket crushed, torn or hardened
- Engine rebuild requiring new crankcase gasket
- Replacement required when related block studs are removed
🔄 Supersession & Cross Reference
OEM Supersession Chain
- 27-879855001 current OEM gasket reference
OEM / Related Numbers
- 27-879855001
- 879855001
- 27879855001
- Cylinder block gasket
- Crankcase gasket
- 16-892561001 related M10 x 136 block stud
- 11-40140 related M10 nut
- 12-8M0214963 related washer
- 39-8M0071643 related ring seal
Aftermarket / Verified Equivalents
- OEM gasket match recommended for 27-879855001
- Complete aftermarket gasket sets for Mercury 1.5L DFI may include this gasket where listed by OEM number
- Do not substitute by shape alone; porting and sealing bead layout must match the 1.5L DFI block diagram
📦 Condition
- Genuine Quicksilver part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
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
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?
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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