Mercury 3" and 4" Blocked Flow Riser/Elbow Gasket 27-860231 

Mercury 3" and 4" Blocked Flow Riser/Elbow Gasket replaces MerCruiser part # 27-860231

Exhaust Elbow Gaskets have side leakage-proof treatment and sticking proof treatment.

• Temperature Limit: 1112 F
• Thickness: 1/16 Inch
• Density of Sheet:1.309 / cm3
• Compressibility: 15-35%
• Recovery: 20% Min.
• Bolt Holes measure 3-7/16" center to center lengthwise and 3-1/16 center to center width wise. 
• Blocks water flow for Closed Cooling applications