Mercury MerCruiser Alpha Bell Housing Rubber Gasket - 27-8M0204656
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The Mercury MerCruiser Quicksilver 27-8M0204656 is a genuine Mercury Marine OEM bell housing rubber gasket used on select MerCruiser sterndrive and transom assemblies. This gasket replaces the earlier 27-35982 / 35982 reference and is used where the factory parts diagram calls for this sealing ring at the bell housing interface. It helps seal the specified water, exhaust, or drive-interface passage so the sterndrive connection remains properly sealed during operation.
Key Features
- Genuine Mercury Marine factory OEM rubber gasket.
- Current Mercury/MerCruiser part number: 27-8M0204656.
- Short part number: 8M0204656.
- Earlier Mercury/MerCruiser reference: 27-35982 / 35982.
- Molded round rubber gasket/sealing ring for select bell housing and transom assembly locations.
- GTIN/UPC reference associated with the earlier part family: 745061138773.
- Used where the Mercury/MerCruiser sterndrive or bell housing diagram specifically calls for this gasket.
- Designed to seal the specified drive-interface passage during sterndrive assembly service.
Application Compatibility
Common where-used application groups include select MerCruiser sterndrive, transom, and bell housing assemblies by serial number and diagram location, including:
- IA / IB / IC EZ-Shift applications where specified
- MC-I applications where specified
- R / MR drive and transom applications where specified
- Alpha One applications where specified
- Alpha One Gen II applications where specified
- Select classic MerCruiser inline-4, inline-6, V6, small-block V8, and big-block V8 sterndrive packages where the diagram calls for 27-35982 or 27-8M0204656
Use this gasket only where the Mercury/MerCruiser parts diagram specifically calls for 27-8M0204656, 8M0204656, 27-35982, or 35982.
Fitment Notice
Confirm fitment by drive serial number, transom assembly, bell housing style, and exact Mercury/MerCruiser parts diagram before ordering. MerCruiser used different gaskets, O-rings, bellows, water passage seals, exhaust seals, and transom hardware across similar Alpha, MC-I, R, and MR drive families, so drive family alone is not enough to confirm fitment.
When This Part Needs Replacement
Replace this gasket whenever the bell housing or related sterndrive interface is opened and the original seal is compressed, hardened, cracked, torn, swollen, flattened, leaking, or damaged during removal. It should also be inspected if there is water leakage, exhaust leakage, visible deterioration around the bell housing interface, or sealing failure after drive service.
Installation Notes
Clean the mating surfaces fully before installing the new gasket. Remove old rubber, gasket material, salt buildup, corrosion residue, grease, and debris without gouging the sealing faces. Inspect the bell housing, transom assembly, water passage area, exhaust passage area, bellows, clamps, fasteners, and related seals while the drive is apart. Install the gasket in the exact position shown in the Mercury/MerCruiser service diagram and tighten the assembly using the correct service-manual procedure for the drive model.
Alternate/Superseded Part Numbers
- 27-8M0204656 — current Mercury/MerCruiser formatted service part number
- 8M0204656 — current short part number
- 27-35982 — earlier Mercury/MerCruiser reference
- 35982 — earlier short part number
Parts Desk Insight
Bell housing gaskets should be replaced whenever the sealing joint is disturbed. Even if the old gasket looks reusable, compression set and age can prevent it from sealing evenly after reassembly. Matching the gasket by Mercury part number and drive diagram helps prevent leaks at the sterndrive connection and avoids repeat teardown.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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