27-863726 Exhaust Gaskets for MerCruiser - 4 Pack

SERDAMARINE / MARINE EXHAUST PARTS

Exhaust Elbow and Spacer Gasket for MerCruiser GM V6 & V8 Center-Riser Open Applications

This aftermarket exhaust elbow and spacer gasket corresponds to MerCruiser reference 27-863726 and seals the exhaust manifold, elbow, and spacer interfaces on specified MerCruiser GM V6 and V8 configurations. It aligns with the center-riser open passage layout (such as 27-860232 / GLM 32080) for designated wet-joint models (1981 and up or 1983 through 0M serial numbers, depending on engine family) and specified GM V6/V8 small-block Dry Joint "Alternative" manifold/spacer interfaces (0M serial numbers and up).

Configuration & Specifications

Engine Applications

This gasket fits the MerCruiser GM V6 and V8 exhaust applications listed below. Match the engine family, cubic-inch displacement, exhaust-joint design, required passage layout, and serial-number range to your assembly before ordering.

• MerCruiser Model 175-205 (V6, GM 229 / 262 CID) — Year / serial phase: 1983 – 0M SN#’s. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer. Fits when specified
• MerCruiser Model 200-320 (V8 Small Block, GM 305 / 350 / 377 CID) — Year / serial phase: 1983 – 0M SN#’s. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer. Fits when specified
• MerCruiser Model 330-370 (V8 Big Block, GM 454 / 502 CID) — Years: 1981 and up. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer. Fits when specified
• MerCruiser GM V6 / V8 Small Block — Serial numbers: 0M and up. Exhaust configuration: Dry Joint "Alternative" system at the manifold/spacer interface. Fits when specified

Application Check Required

• Mercury Mariner 200 (DFI / EFI), 200 PRO XS, 225 (EFI / DFI), 225 SEAPRO, 250 (DFI / EFI) 3.0L — Listed in supplementary notes without specific exhaust interface or serial-number details. Verify by OEM part number 27-863726 and physical gasket passage layout against your engine parts diagram. Confirm application

Reference Numbers

The numbers below are provided for part identification and cross-reference only; they do not alone guarantee interchangeability across different cooling flows or indicate OEM manufacturer identity.

Supplied Parts

• 4 × Exhaust Elbow and Spacer Gasket — identical gaskets with the same OEM reference: 27-863726.

Service & Installation Notes

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

1. Allow the engine and exhaust assembly to cool completely, shut off the battery switch, and take precautions to prevent accidental starting before loosening any exhaust hardware.
2. Support heavy exhaust elbows and spacers during disassembly so weight does not damage threads or cast sealing surfaces.
3. Clean old gasket material and corrosion from the mating surfaces of the manifold, spacer, and elbow without gouging or rounding the machined sealing faces.
4. Compare the new open center-riser gasket side-by-side with the required cooling passage layout for that specific joint; do not substitute an open gasket where your cooling diagram specifies a restricted (27-860233) or closed block-off (27-860231) gasket.
5. Tighten fasteners evenly in the sequence and to the torque specification listed in the engine manufacturer's service manual. After assembly, inspect the joint for exhaust or water leaks during initial operation and stop the engine immediately if any abnormality 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