Throttle Body Gasket – Fits Mercury/Mercruiser MPI Engines (Replaces 27-805396)
Throttle Body Gasket – Fits Mercury/Mercruiser MPI Engines (Replaces 27-805396) is backordered and will ship as soon as it is back in stock.
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Throttle Body Gasket – Fits Mercury/Mercruiser MPI Engines (Replace...
Product Details
This high-quality aftermarket Throttle Body Gasket provides a precision seal between the throttle body and intake plenum on a wide range of Mercury/Mercruiser MPI (Multi-Port Injection) engines. It is designed for gasoline applications from 1993 to 1998, covering models like the 350 MAG, 454 MAG, 502 MAG, 7.4L, and 8.2L series.
It serves as a direct replacement for Mercury/Quicksilver part number 27-805396 and Mercury/Mercruiser 805396, ensuring a perfect fit and reliable performance.
- Engineered for direct-fit installation.
- Resists gasoline and engine oil degradation.
- Seals the throttle body to the intake plenum to prevent air leaks.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Quicksilver | 27-805396 |
| Mercury/Mercruiser | 805396 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mercruiser models, compatibility often depends on the engine serial number. Please verify your serial number falls within the specified range.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mercruiser | 350 MAG MPI SKI | 350 | 4-Stroke | 1995–1996 | 27-805396 | Serial: 0F350583-0F799999 |
| Mercury/Mercruiser | 350 MAG BRAVO MPI | 350 | 4-Stroke | 1995 | 27-805396 | Serial: 0F415189-0F601999 |
| Mercury/Mercruiser | 350 MAG BRAVO MPI (GEN+) | 350 | 4-Stroke | 1996 | 27-805396 | Serial: 0F602000-0K001500 |
| Mercury/Mercruiser | 350 MAG BRAVO MPI (GEN+) | 350 | 4-Stroke | 1997 | 27-805396 | Serial: 0K001501 and up |
| Mercury/Mercruiser | 454 EFI (SKI) GEN. V | 454 | 4-Stroke | 1995 | 27-805396 | Serial: 0F215800-0F820099 |
| Mercury/Mercruiser | 454 EFI (GEN. V) | 454 | 4-Stroke | 1994–1996 | 27-805396 | Serial: 0F115700-0F802349 |
| Mercury/Mercruiser | 454 MAG MPI (SKI) GEN. VI | 454 | 4-Stroke | 1996–1997 | 27-805396 | Serial: 0F820100-0K999999 |
| Mercury/Mercruiser | 454 MAG BRAVO MPI (GEN VI) | 454 | 4-Stroke | 1996–1997 | 27-805396 | Serial: 0F802350-0K999999 |
| Mercury/Mercruiser | 454 MAG MPI BRAVO (GEN VI) | 454 | 4-Stroke | 1998 | 27-805396 | Serial: 0L010029-0L058399 |
| Mercury/Mercruiser | 502 EFI (GEN. V) | 502 | 4-Stroke | 1993–1995 | 27-805396 | Serial: 0D840650-0F802599 |
| Mercury/Mercruiser | 502 MAG MPI (GEN VI) | 502 | 4-Stroke | 1996 | 27-805396 | Serial: 0F802600-0K999999 |
| Mercury/Mercruiser | 502 MAG MPI BRAVO (GEN VI) | 502 | 4-Stroke | 1998 | 27-805396 | Serial: 0L017000-0L085432 |
| Mercury/Mercruiser | 7.4L MIE MPI (LH) GEN. V | 454 | 4-Stroke | 1995–1996 | 27-805396 | Serial: 0F563052-0F820103 |
| Mercury/Mercruiser | 7.4L MIE MPI (LH) GEN. VI | 454 | 4-Stroke | 1996–1997 | 27-805396 | Serial: 0F820104-0K999999 |
| Mercury/Mercruiser | 7.4LX BRAVO (MPI)(GEN. V) | 454 | 4-Stroke | 1996 | 27-805396 | Serial: 0F602010-0F801999 |
| Mercury/Mercruiser | 7.4LX BRAVO (MPI)(GEN. VI) | 454 | 4-Stroke | 1996–1997 | 27-805396 | Serial: 0F802000-0K999999 |
| Mercury/Mercruiser | 8.2L MIE MPI (LH) GEN. VI | 502 | 4-Stroke | 1996–1997 | 27-805396 | Serial: 0F819620-0K999999 |
Technical Specs
- Product Type
- Throttle Body Gasket
- Application
- Seals between throttle body and intake plenum
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Material
- Composite gasket material
- Dimensions
- 11.25 × 6.0 × 1.13 inches (285.75 × 152.4 × 28.7 mm)
- Weight
- 0.03 lb (0.014 kg)
- Warranty
- OEM standard warranty
What’s in the Box
- 1 x Throttle Body Gasket (27-805396)
Installation Notes
- Disconnect the battery and ensure the engine is cool.
- Relieve fuel system pressure following the manufacturer's procedure.
- Remove the air intake housing and any connected sensors or hoses from the throttle body.
- Carefully disconnect the throttle linkage and any other connections.
- Unbolt and remove the throttle body from the intake plenum.
- Remove the old gasket and thoroughly clean both mating surfaces. Ensure they are free of old gasket material, oil, and debris.
- Position the new gasket onto the intake plenum, aligning it with the mounting holes.
- Reinstall the throttle body, tightening the bolts in a crossing pattern to the manufacturer-specified torque.
- Reconnect all linkages, sensors, and hoses.
- Reconnect the battery and start the engine to check for air leaks.
Troubleshooting & FAQ
How do I know this gasket is the right fit for my engine?
The best way to confirm fitment is to check your engine model and serial number against the compatibility table provided. This gasket replaces Mercury part number 27-805396. If your existing gasket part number matches, this is the correct replacement.
What are the symptoms of a failed throttle body gasket?
Common signs include a high or fluctuating idle, a whistling sound from the engine bay, a check engine light with lean or vacuum leak codes (e.g., P0171, P0174), and engine hesitation or stalling.
Do I need to use sealant with this gasket?
No, this gasket is designed to be installed dry. The composite material creates a seal when compressed. Using sealants can sometimes interfere with proper sealing or cause material degradation.
How often should this gasket be replaced?
It is recommended to replace the throttle body gasket whenever the throttle body is removed for service or cleaning. There is no fixed replacement interval, but it should be inspected for damage or leaks during routine maintenance.
What is the difference between this and the OEM gasket?
This aftermarket gasket is designed to meet or exceed OEM specifications for fit, form, and function. It is made from a comparable composite material and provides a reliable seal at a more accessible price point.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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