27-863724 Exhaust Gaskets for MerCruiser - 2 Pack

SERDAMARINE / MARINE EXHAUST PARTS

Exhaust Elbow Gasket — Raw Water Cooling

This aftermarket exhaust elbow joint gasket (referenced to MerCruiser 27-863724) seals the exhaust manifold-to-elbow joint on listed MerCruiser Stern Drive V6 and V8 engines equipped with raw-water cooling. It serves specified Wet Joint exhaust systems from 1981 and 1983 onward, as well as designated GM V6 and V8 small-block Dry Joint "Alternative" configurations from 0M serial numbers and up.

This listing is for an individual exhaust gasket only, not an exhaust manifold or exhaust elbow assembly.

Configuration & Specifications

Engine Applications

Applies to the MerCruiser Stern Drive raw-water-cooled applications listed below. Match the gasket reference, cooling arrangement, and joint design to the parts installed on your engine; raw-water, fresh-water, and manifold-and-spacer gasket types are listed separately.

• MerCruiser Stern Drive — Model 175–205 (V6, GM 229 / 262 CID)
  Years / Serial Range: 1983 – 0M serial numbers. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint. Fits when specified
• MerCruiser Stern Drive — Model 200–320 (V8 Small Block, GM 305 / 350 / 377 CID)
  Years / Serial Range: 1983 – 0M serial numbers. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint. Fits when specified
• MerCruiser Stern Drive — Model 330–370 (V8 Big Block, GM 454 / 502 CID)
  Years: 1981 & UP. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint. Fits when specified
• MerCruiser Stern Drive — GM V6 / V8 Small Block
  Serial Range: 0M serial numbers & UP. Cooling: Raw water cooling. Joint Configuration: Dry Joint "Alternative" exhaust manifold-to-elbow arrangement. Fits when specified
• MerCruiser Stern Drive — 350 MAG, 454 MAG, 502 MAG / 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.2L
  Cooling: Raw water cooling. Position: Exhaust elbow joint. Applies where matched to the listed CID, serial number, and Wet Joint or Dry Joint "Alternative" requirements above. Fits when specified

Reference Numbers

The numbers below are public identification references for part lookup and do not by themselves establish universal interchangeability or original manufacturer identity.

Supplied Parts

• 2 × Exhaust Elbow Gasket — identical gaskets with the same OEM reference: 27-41813; 27-860233; 27-863724.

Service & Installation Notes

General service guidance only. Use the service manual for your exact engine and exhaust configuration.

1. Ensure the engine is shut down, completely cool, and secured against accidental starting before servicing the exhaust manifold-to-elbow joint.
2. Support the exhaust elbow during removal and installation, and clean both mating surfaces thoroughly without gouging or warping the sealing faces.
3. Compare the water passage layout and joint profile of the new gasket against the removed gasket and your engine's raw-water cooling configuration before assembly.
4. Tighten fasteners to the sequence and torque values specified in your engine service manual, then inspect the joint for exhaust or water leaks during initial operation with proper cooling water supply; shut down immediately if any leak or abnormal temperature occurs.

The Serdamarine Approach

Exhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.

Questions Before Replacement