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27-807982 Carburetor Base Gasket Fits MerCruiser 120, 140

$10.50

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Product Overview

XR MARINE · CARBURETORS & REPAIR KITS

27-807982 Carburetor Base Gasket Fits MerCruiser 120, 140

This XR Marine carburetor base gasket is designed for the carburetor mounting interface on listed MerCruiser inline-four marine engines, including MerCarb carburetor base applications referenced to 27-807982. Use it when replacing the mounting gasket between the carburetor base and the intake manifold on listed MerCruiser 120, 140, 3.0LX, and 3.0L models. This listing is for a single carburetor mounting gasket category component, not a complete carburetor assembly or full rebuild kit.

Free shipping on all orders. Lifetime warranty for product quality defects. Normal wear and tear excluded.

Product Specifications

Key product details for identification and comparison.

Product Type Carburetor Base Gasket (Carburetor Mounting Gasket)
Brand XR Marine
Primary OEM Reference 27-807982
Installation Position Carburetor base / carburetor mounting interface
Carburetor Application Note MerCarb carburetor base (on listed MerCruiser models)
Listed Engine Models MerCruiser 120, 140, 3.0LX, 3.0L (Inline 4, 4-cylinder)

Fitment

The 27-807982 Carburetor Base Gasket from XR Marine fits MerCruiser 120, 140, 3.0LX, and 3.0L inline-4 stern drive engines in the model-year applications listed below.

Match the full model designation on your engine identification plate against the individual entries below, and compare the complete OEM reference number including any suffix. Engine displacement or cylinder count alone cannot confirm carburetor base gasket compatibility across different carburetor configurations.

  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1982 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1983 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1984 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1985 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1986 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1987 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1988 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1989 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1990 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1991 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1992 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1993 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1994 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 120 | Year: 1995 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1982 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1983 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1984 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1985 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1986 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1987 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1988 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1989 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1990 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1991 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1992 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1993 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1994 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 140 | Year: 1995 | Configuration: Inline 4, 4-cylinder | Displacement: 153/181 CID (grouped application displacement, not allocated individually by model)
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 3.0LX | Year: 1990 onward (end year not stated) | Configuration: GM 181 CID inline 4, 4-cylinder
    ✓ Fits
  • Brand: MerCruiser Stern / Out Drive | Model: 3.0L | Year: 1990 onward (end year not stated) | Configuration: GM 181 CID inline 4, 4-cylinder
    ✓ Fits

OEM & Part Number References

Use the complete reference number, including its suffix, when comparing parts. Reference numbers do not confirm that every version is interchangeable.

Brand / Source Reference Numbers
MerCruiser Stern / Out Drive 27-807982, 27-70143-1, 8079821, 27807982 1, 27-807982-1, 27-807982B
Mercury Mariner / MerCruiser Stern / Out Drive 27-701431, 27-8079821, 27-70143, 27-70143B1
OMC 0508568, 0778087, 0909758
Sierra 18-0994, 18-0994-9
GLM 32180
Mallory 9-61011
RECMAR REC27-8079821

What's Included

Check the supplied components before planning your repair.

  • Carburetor Base Gasket (OEM Reference: 27-807982)

Contact XR Marine to confirm the exact package quantity before ordering if your repair requires multiple gaskets.

Installation Guide

General installation overview. Follow the service manual for your exact engine and carburetor configuration. Fuel-system work requires the appropriate skills and precautions.

  1. Prepare the work area and remove the carburetor: Ensure the engine is shut off and cool, isolate the fuel supply and battery/ignition according to your service manual, and work in a well-ventilated space away from ignition sources. Label and disconnect the throttle linkage, choke connections, and fuel line, then unbolt and lift the carburetor from the intake manifold.
  2. Clean mating surfaces and verify gasket alignment: Carefully remove all old gasket residue from both the carburetor base flange and the manifold mounting surface without gouging the metal or allowing debris into the intake throat. Compare the new 27-807982 base gasket against the existing gasket, carburetor base, and mounting studs to verify that all bores, vacuum passages, and bolt holes align cleanly.
  3. Reinstall the carburetor and check for leaks: Position the new gasket in the orientation specified by your service manual, seat the carburetor evenly on the mounting studs, and tighten the fasteners in the sequence and specification required by the manual. Reconnect the fuel line and linkages, verify smooth throttle and choke travel without binding, restore the fuel supply to inspect for leaks, and only run the engine with proper cooling water supplied.

Before You Order

A careful fitment check helps you choose the right part the first time.

  • Match the full engine model designation on the identification plate.
  • Check the individual year entry and any serial-number or version restrictions.
  • Compare the complete OEM reference number, including its suffix. Horsepower or appearance alone is not enough.
  • Confirm the package contents and the quantity needed for your repair.
  • Do not select a gasket solely by the general "carburetor base gasket" name; verify that your MerCruiser inline-4 carburetor assembly calls for the MerCarb base gasket referenced to 27-807982.

Need help checking fitment? Have your engine identification details, the existing part number and clear photos ready when you contact XR Marine.

Ask XR Marine About Fitment

Why XR Marine

Carburetors are our focus. Fitment comes first.

XR Marine specializes in marine carburetors, carburetor repair kits and the related parts needed for these repairs. We keep our focus on this product line so that product information stays centered on the details that matter: engine applications, complete part-number references and what is included.

Use our individual fitment entries and part references to compare your application, then contact XR Marine if you need help before ordering.

Shipping

Free shipping on all orders. No minimum order value.

For questions about delivery to your destination or delivery timing, contact XR Marine before placing your order.

Contact XR Marine About Shipping

Lifetime Warranty

XR Marine provides lifetime warranty coverage for product quality defects. Normal wear and tear is excluded.

  • Covered: product quality defects.
  • Not covered: normal wear and tear.

Contact XR Marine for warranty assistance. Having your order details and a description of the issue available can help us understand your request.

Contact XR Marine About Warranty

Frequently Asked Questions

Answers to common questions about this product and its application.

Is this product a complete carburetor rebuild kit or just the mounting gasket?

This product is the carburetor base/mounting gasket only, referenced to 27-807982. It installs at the carburetor mounting interface and does not include internal carburetor rebuild components such as needles, seats, floats, or bowl gaskets.

Which MerCruiser engines are listed for this carburetor base gasket?

It fits listed MerCruiser Model 120 and Model 140 inline-4 (4-cylinder, 153/181 CID grouped application) engines from 1982 through 1995, as well as MerCruiser 3.0LX and 3.0L (GM 181 CID inline-4, 4-cylinder) engines from 1990 onward. Always verify your carburetor base gasket part number against your engine parts catalog before ordering.

Why do the MerCruiser 120 and 140 entries show "153/181 CID" together?

In the source application records, the 153/181 CID displacement is recorded as a grouped application across the Model 120 and Model 140 inline-4 series (1982–1995) rather than allocated separately by individual model. Because different carburetors can be mounted on inline-4 engines, always match the complete gasket reference number 27-807982 or one of the listed references.

How should I compare part numbers and suffixes such as 27-807982-1 or 27-807982B?

Always compare the complete part number—including hyphens and suffixes—found in your MerCruiser parts manual or on your existing gasket package. This listing references MerCruiser numbers 27-807982, 27-807982-1, 27-807982B, 8079821, 27-8079821, 27-70143, 27-70143-1, 27-701431, and 27-70143B1, along with OMC, Sierra, GLM, Mallory, and RECMAR references.

Does this gasket also correspond to OMC, Sierra, or GLM reference numbers?

Yes. In addition to the MerCruiser references, this carburetor base gasket is referenced to OMC 0508568, 0778087, and 0909758; Sierra 18-0994 and 18-0994-9; GLM 32180; Mallory 9-61011; and RECMAR REC27-8079821. Confirm your exact carburetor mounting flange layout before installation.

What shipping and warranty policies apply to this gasket?

All XR Marine orders include free shipping with no minimum order value. We also provide lifetime warranty coverage for product quality defects, with normal wear and tear excluded.

Related Parts

Review these related parts according to the relationship described below.

  • Component of: MerCruiser Wet Joint Exhaust Manifold Gasket Repair Kit — this carburetor base gasket (27-807982) is used as a component in selected MerCruiser Wet Joint Exhaust Manifold Gasket Repair Kits (in configurations requiring quantity 1 or quantity 2 depending on the kit). These manifold gasket kits are separate products and are not included with this carburetor base gasket.

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